1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

FEATURES

84CXXX CPU

ROM, RAM and I/O configurations are device
dependent; see Chapter 3

Two test inputs: T0 (ANDed with Port 1 input lines)
and T1

3 single-level vectored interrupt sources:

external (T0/INT and Port 1, for keypad press

wake-up function)

timer/counter (TI)

hardware modulator interrupt

8-bit programmable timer/counter with 5-bit pre-scaler

Power saving: Idle and Stop modes are provided

Hardware Modulator providing pulse bursts, with:

programmable duty factor for each pulse

programmable number of pulses

One output line from the Hardware Modulator to control
the driver transistor for the infrared LED (IR-LED).
Capable of sinking 27 mA at V

= 2.0 V, V

OUT

= 1.0 V

Watchdog Timer to keep the transmitter from being
locked or malfunction

Available packages: SO and DIP types (SO20, SO24,
SO28, SDIP24 and DIP20); see Chapter 4

On-chip oscillator: 455 kHz to 6 MHz

Single supply voltage: 2.0 V to 5.5 V

Operating temperature:

20 to +50

GENERAL DESCRIPTION

The PCA84C122 is a stand-alone microcontroller
designed for use in remote control transmitters for a wide
range of applications.

The PCA84C122 provides a number of dedicated
hardware functions for remote controller applications.
These functions include the following additional blocks to
the 84CXXX core:

Interrupt Gate

Hardware Modulator

Output Driver

Watchdog Timer.

Although the PCA84C122 is specifically referred to
throughout this data sheet, the information applies to all
the devices. The differences between the PCA84C122
and the other devices are specified in Chapter 3.

Figure 2 shows the general block diagram of the device.
The 84CXXX core plus 8 kbytes ROM and 64 bytes RAM
has the same function as described in the PCF84CXXX
family description (see

"Data Handbook IC14").

When the transmitter is not in use the microcontroller is in
Stop mode and the oscillator is halted. The AND gate
connected to the Port 1 (P10 to P17) lines provides the
wake-up to end the Stop mode.

The Hardware Modulator produces pulse bursts according
to the required protocol. The ON-time and OFF-time of
each pulse (i.e. duty factor) and the number of pulses are
controlled by software.

The Watchdog Timer (WDT) will reset the PCA84C122
when it has not been reloaded (reset) in time, because the
program has run out of sequence (endless loop,
continuous Idle mode, etc.). During Stop mode the
oscillator is halted, therefore the Watchdog Timer is not
running.

Automatic system reset is generated by the WDT if the
timer is not reset before overflow from counting within
a certain period of time.

The Output Driver can handle sufficient current to drive a
single transistor, that provides the required current for the
IR-LED.

2.1

Important note

This data sheet details the specific properties of the
PCA84C122; PCA84C222; PCA84C422; PCA84C622
and PCA84C822. The shared characteristics of the family
of microcontrollers are described in the PCF84CXXXA
Family single-chip 8-bit Microcontroller of

"Data Handbook

IC14", which should be read in conjunction with this data
sheet.

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

MEMORY AND I/O CONFIGURATIONS

Note

1. 4 I/O lines with 10 mA sink capability.

ORDERING INFORMATION

Note

1. `X' in the type number denotes the numbers: 1, 2, 4, 6 and 8.

DEVICE

I/O LINES

ROM

RAM

PCA84C122A

32 bytes

PCA84C122B

PCA84C222A

PCA84C222B

PCA84C422A

PCA84C422B

PCA84C622A

64 bytes

PCA84C622B

PCA84C622C

(1)

PCA84C822A

PCA84C822B

PCA84C822C

(1)

TYPE NUMBER

(1)

PACKAGE

NAME

DESCRIPTION

VERSION

PCA84CX22AP

SDIP24

plastic shrink dual in-line package; 24 leads (400 mil)

SOT234-1

PCA84CX22AT

SO24

plastic small outline package; 24 leads; body width 7.5 mm

SOT137-1

PCA84CX22BP

DIP20

plastic dual in-line package; 20 leads (300 mil)

SOT146-1

PCA84CX22BT

SO20

plastic small outline package; 20 leads; body width 7.5 mm

SOT163-1

PCA84C622CT

SO28

plastic small outline package; 28 leads; body width 7.5 mm;
low stand-off height

SOT136-1

PCA84C822CT

Fig.1 Numbering scheme.

84C122

MLA973 - 1

technology:
PC = CMOS

temperature range:
A = 20 to 50 C

package:
P = plastic DIL
T = plastic mini-pack (SO)

generic type number

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

PINNING INFORMATION

6.1

Pinning

MCD251 - 2

84CX22AP
84CX22AT

P01

P00

RESET

VDD

XTAL2

XTAL1

P04

P05

P02

P03

VSS

P10

P11

P12

P13

P07

P06

P16

P17

P14

P15

T0 / INT

OUT

Fig.3

Pin configurations PCA84CX22AP (SDIP24)
and PCA84CX22AT(SO24).

Fig.4 Pin configuration PCA84CX22CT (SO28).

P14

P01

P00

RESET

V DD

XTAL2

XTAL1

P04

P05

P16

P17

P06

P07

P13

P12

P11

P10

VSS

P03

P02

P15

P22

P23

P20

P21

84C622CT
84C822CT

MLA977 - 1

T0/INT

OUT

P01

P00

RESET

V DD

XTAL2

XTAL1

P04

P05

P02

P03

VSS

P10

P11

P12

P13

P07

P06

MCD250 - 2

T0 / INT

OUT

84CX22BT

Fig.5 Pin configuration PCA84CX22BT (SO20).

Fig.6 Pin configuration PCA84CX22BP (DIP20).

84CX22BP

MLA975 - 2

P10

P03

P02

P01

P00

T0/INT

RESET

XTAL2

XTAL1

P04

P05

P06

P07

P12

P11

OUT

P13

V DD

VSS

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

6.2

Pin description

Table 1

Pin description for PCA84CX22AP, PCA84CX22AT, PCA84CX22BP, PCA84CX22BT and PCA84CX22CT

POWER-ON-RESET STATUS AND PORT OPTIONS

All Port lines are standard I/O (option 1).

RESET (Power-on-reset) level of 1.3 V.

After Power-on-reset, Port 0 is reset to LOW; Port 1, Port 2 and OUT are reset to HIGH.

SYMBOL

PIN

DESCRIPTION

SDIP24/SO24

(see Fig.3)

SO28

(see Fig.4)

SO20

(see Fig.5)

DIP20

(see Fig.6)

P00 to P07

3, 2, 23, 22,
10, 11, 14, 15

4, 3, 26, 25,
11, 12, 17, 18

2, 1, 20, 19, 9,
10, 11, 12

7, 6, 5, 4, 14,
15, 16, 17

standard I/O Port lines, generally
used for keypad scanning

P10 to P17

19, 18, 17, 16,
1, 22, 12, 13

22, 21, 20,19,
2, 27, 13, 16

16, 15, 14, 13

1, 20,19, 18

standard I/O Port lines, generally
used for keypad sensing

P20 to P23

14, 15, 1, 28

standard I/O Port lines, generally
used for visible LED's

T0/INT

test T0 and external interrupt input

test T1 input

RESET

active HIGH reset;
normally connected to V

For further information see
PCF84CXXXA description in
"Data Handbook IC14".

XTAL1

crystal or ceramic resonator

XTAL2

OUT

pulse train output pin, capable of
sinking 27 mA

power supply

ground

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

HARDWARE MODULATOR

The Hardware Modulator is the main derivative part in the
PCA84C122. Figure 7 shows the internal architecture.

The Hardware Modulator generates a pulse train whereby
the ON-time of a pulse and the OFF-time between pulses
can be programmed in a number of clock cycles
(period = 1/f

osc

); see Figs 8 and 7.

The number of pulses of the train is also programmable.
The time between pulse bursts is determined by software,
possibly using the standard 8-bit Timer/Counter.

8.1

Interface between the 84CXXX core and
derivative logic

There are three (derivative) registers and one (derivative)
counter that must be loaded from the core.

Fig.7 Hardware Modulator.

MCD255 - 1

internal bus (IB0 7)

CONTROL LOGIC

control

PULSE COUNTER

HIGH

(2)

PULSE TIMER

PULSE COUNTER

LOW

(8)

OFF-TIME

(8)

ON-TIME

(8)

CONTROL

(5)

f osc

OUT

(8)

Fig.8 Example pulse train output of OUT pin.

OFF-time

ON-time

pulse #1

pulse #2

pulse #3

interrupt

end

elapse time by software

OFF-time = 4 (off-time register = 2)

ON-time = 2 (on-time register = 0)

number of pulses = 3

start

MCD254

OUT

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

8.1.1

ON-

TIME

EGISTER

(

ADDRESS

: 00H)

This 8-bit register is loaded by software; the decimal value
of its contents + 2, determine the number of oscillator
cycles that the OUT pin is active.

The active period (ON-time) of OUT

8.1.2

OFF-

TIME

EGISTER

(

ADDRESS

: 01H)

This 8-bit register is loaded by software; the decimal value
of its contents + 2, determine the number of oscillator
cycles that the OUT pin is inactive.

The inactive period (OFF-time) of OUT

contents

(

)

osc

---------------------------------------

contents

(

)

osc

---------------------------------------

8.1.3

ULSE

OUNTER

The Pulse Counter, is a 10-bit register consisting of:

Pulse Counter Low (8-bit); address 02H.

Pulse Counter High (2-bit); address 04H.

The Pulse Counter is loaded by software with the number
of pulses required in a pulse burst; loading `0' is not
allowed.

8.1.4

ONTROL

EGISTER

(

ADDRESS

03H)

The Control Register contains the bits that control various
possibilities for the output pulses, plus the reset of the
interrupt flip-flop and the Watchdog timer.

Table 2

Control Register (CR)

Table 3

Description of the CR bits

8.2

Instructions for data transfer between the 84CXXX core and derivative logic

RWDT

Rint

PWM

LgP

BIT

SYMBOL

DESCRIPTION

7 to 5

Reserved.

RWDT

Reload Watchdog Timer: This is not an actual flip-flop in the Control Register. If a logic 1 is
written to this bit position the Watchdog Timer is reloaded (reset to 0); this bit is Write only.

Rint

Reset Interrupt: This is not an actual flip-flop in the Control Register. If a logic 1 is written to this
bit position the interrupt flip-flop is reset; this bit is Write only.

PWM

Pulse Width Modulation: Is the standard term for a quasi analog signal. It is a square wave
signal of which the duty cycle may be varied. When integrated a real analog signal may be
obtained. When PWM = 1; the Pulse Counter Register is ignored and a continuous pulse train is
generated (see Fig.9); this bit is Read or Write.

LgP

Long Pulse: When LgP = 1; the OFF-time Register is ignored and a single pulse of length

is generated. If HF = 1, this pulse is modulated with a

frequency

osc

(see Fig.10); this bit is Read or Write.

High Frequency: When HF = 1 the ON-time part of the generated pulse is modulated with a
frequency

osc

(see Fig.11); this bit is Read or Write.

INSTRUCTION

DESCRIPTION

MOV Dx,A

Move contents of the accumulator to the derivative register.

MOV A,Dx

Move contents of derivative register to the accumulator.

ANL Dx,A

AND derivative register contents with contents of accumulator. Result is stored in derivative register.

ORL Dx,A

OR derivative register contents with contents of accumulator. Result is stored in derivative register.

ON-time

(

)

number of pulses

(

)

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

8.3

Operation of the Hardware Modulator

First the ON-time and OFF-time registers are loaded. The
number of pulses to be generated is stored in the Pulse
Counter. The Hardware Modulator starts as soon as the
Pulse Counter is loaded. First the signal OUT is activated
and the ON-time value is stored in the Pulse Timer. Then
the Pulse Timer is counted down with pulses of 1/f

osc

When the Pulse Timer reaches zero the OUT signal
becomes inactive and the value held in the Pulse Counter
is decreased by `1'. If the Pulse Counter is not yet zero, the
OFF-time is stored in the Pulse Timer and is counted down
again. When it reaches zero now, signal OUT is activated
again, ON-time is loaded and the counter starts counting
down etc. On the Pulse Counter reaching zero, an interrupt
(Special Interrupt, SI) is sent to the CPU, indicating that the
Hardware Modulator is ready.

The delay between two pulse bursts is determined by
software. When a new burst must be generated with the
same ON-time and OFF-time values, only the Pulse
Counter is loaded with the required number of pulses and
the Hardware Modulator will start automatically. The
interrupt signal is reset when the Pulse Counter is loaded
or can be reset directly by writing a logic 1 to bit Rint of the
Control Register.

INTERRUPTS

There are three different interrupt sources with different
vectors within the PCA84C122, these are:

External keypad wake-up and T0/INT pin;
vector address: 03H

Hardware modulator (SI); vector address: 05H

Internal Timer/counter (TI); vector address: 07H.

9.1

Internal timer/counter

The internal timer/counter is the same as in the other
members of the PCF84CXXX family. Instructions
`EN TCNTI' and `DIS TCNTI' are to enable/disable
the interrupt.

9.2

External keypad wake-up and T0/INT pin

9.2.1

EYPAD WAKE

The keypad wake-up function generates an interrupt
signal to the CPU. This signal is used to terminate the Stop
mode and thus allows program execution to continue.
If the external interrupt is enabled the microcontroller
executes the instruction immediately following the STOP
instruction, before executing the interrupt routine.

If the external interrupt is disabled, program execution
continues with the instruction following the STOP
instruction.

The wake-up function is activated when any of the
sense lines (Port 1 pins) are pulled LOW.

9.2.2

T0/INT

T0/INT must be connected to V

when not in use,

because no internal pull-up or pull-down is present
(floating input).

Because this pin is `ANDed' with Port 1 inputs, the result of
`JTO' and `JNTO' instructions and the interrupt depends on
the AND of all Port 1 and T0/INT inputs.

T0/INT can serve as an extra sense line, when a pull-up
resistor is connected, however, multiple keys will not be
detected.

10 OUTPUT DRIVER

The output of the Hardware Modulator is amplified and
able to sink a current of 27 mA when the OUT signal is
active. Therefore, only one external (PNP) transistor is
required to drive the IR-LED.

LOW level output sink current, minimum 27 mA at
V

= 2.0 V, V

OUT

1.0 V.

11 WATCHDOG TIMER (WDT)

The Watchdog timer consists of a 17 stage counter with a
clock of

osc

. A logic 1 written to RWDT bit (Control

After a Power-on-reset, the WDT is cleared to zero; the
content of the WDT is then incremented by `1' every
30 clock cycles.

If the WDT is not reset to zero before it overflows, a
RESET signal is generated and the device is reset, thus
preventing a lock up or malfunction. The software must
clear the WDT at least 1/f

osc

seconds before it

generates the RESET signal; i.e. at f

osc

= 1 MHz, this is

1.92 s.

In the Idle mode the oscillator is still running and therefore
the WDT remains active. In the Stop mode, the WDT is
fully stopped and the value of the counter is kept.

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

12 LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

13 DC CHARACTERISTICS

= 4.5 V to 5.5 V; V

= 0 V; T

amb

20 to +50

C; all voltages with respect to V

; unless otherwise specified.

SYMBOL

PARAMETER

MIN.

MAX.

UNIT

supply voltage

0.5

+7.0

all input voltages

0.5

+ 0.5

source(max)

maximum source current (all Port lines)

sink(max)

maximum sink current (all Port lines)

OUT

output current

rev

maximum reverse current

500

tot

total power dissipation

500

stg

storage temperature

+125

amb

operating ambient temperature

+50

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply

supply voltage

2.0

3.0

5.5

operating supply current

= 3 V; f

xtal

= 3 MHz

0.4

0.9

= 5 V; f

xtal

= 3 MHz

0.9

1.8

DD(ID)

supply current Idle mode

= 3 V; f

xtal

= 3 MHz

0.20

0.40

= 5 V; f

xtal

= 3 MHz

0.25

0.50

DD(ST)

supply current Stop mode

= 5 V; f

xtal

= 3 MHz

1.20

Inputs (RESET, T0/INT, T1, Port 0: P00 to P07, Port 1: P10 to P17, Port 2: P20 to P23)

LOW level input voltage

0.3V

HIGH level input voltage

0.7V

input leakage current

0.20

Outputs (Port 0: P00 to P07, Port 1: P10 to P17, Port 2: P20 to P23)

LOW level output sink current

= 5 V; V

= 0.4 V

1.6

12.0

= = 5 V; V

= 0.4 V; P20

P23 10

HIGH level pull-up output source
current

= 5 V; V

= 0.7V

100

= 5 V; V

= V

140

400

ULSE OUTPUT

(OUT)

LOW level output sink current

= 2 V; V

= 1.0 V

HIGH level output source current V

= 2 V; V

= 0.7V

1.6

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

15 APPLICATION INFORMATION

Fig.12 PCA84C122A Remote control transmitter application.

P10

P00

P11

P01

P12

P02

P13

P03

P14

P04

P15

P05

P16

P06

P17

P07

84C122A

RESET

XTAL2

XTAL1

VSS

MCD252

100

27 mA

3.0 V

T0 / INT

OUT

Figure 12 shows the main application of the PCA84C122
as a remote control transmitter. Each key of the transmitter
keypad represents a specific command. The keys are in an
orderly matrix with each key connected between an I/O
line of Port 0 and an I/O line of Port 1.

The lines of Port 0 are designated `scan' (output) lines, and
the lines of Port 1 are `sense' (input) lines.

By making each scan line a logic 0 in turn, and each time
looking at the sense lines, the depressed key is detected.
The corresponding command code is determined by using
a software look-up table. This code together with the
system address is sent according to a coding scheme or
protocol (e.g. RC-5). The pulses that are generated are
available at the OUT pin. This pin drives the output
transistor, which provides the current for the IR-LED.

T0/INT is not used and therefore connected to V

. T1 is

used for system or option selection, therefore a jumper can
be connected to V

or ground.

When more options must be selected, this can be done in
different ways as illustrated in the following two examples:

1. When the number of keys is sufficiently low a scan line

can be spared. This scan line may be used to connect
a jumper wire to one of the sense lines. Normally the
scan line should be logic 1. When this line is set to
logic 0 the option setting can be read from the sense
lines.

2. By connecting diodes between one sense line and a

number of scan lines (see Fig.12). If necessary these
diodes can be placed parallel to the keys. When the
sense line is set to logic 0 (acts as scan line), the
option setting can be read from the scan lines (which
act as sense lines and should be set to logic 1
beforehand).

For the oscillator a crystal or ceramic resonator may be
used. A resistor in series with the supply, limits the reverse
current through the IC in the event of the supply voltage
being reversed (i.e. wrong insertion of batteries).

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

UNIT

max.

(1)

REFERENCES

OUTLINE

VERSION

EUROPEAN

PROJECTION

ISSUE DATE

IEC

JEDEC

EIAJ

inches

2.65

0.30
0.10

2.45
2.25

0.49
0.36

0.32
0.23

15.6
15.2

7.6
7.4

1.27

10.65
10.00

1.1
1.0

0.9
0.4

8
0

0.25

0.1

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

Note

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

1.1
0.4

SOT137-1

detail X

(A )

0.25

075E05

MS-013AD

pin 1 index

0.10

0.012
0.004

0.096
0.089

0.019
0.014

0.013
0.009

0.61
0.60

0.30
0.29

0.050

1.4

0.055

0.419
0.394

0.043
0.039

0.035
0.016

0.01

0.25

0.01

0.004

0.043
0.016

0.01

10 mm

scale

SO24: plastic small outline package; 24 leads; body width 7.5 mm

SOT137-1

95-01-24
97-05-22

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

UNIT

max.

(1)

REFERENCES

OUTLINE

VERSION

EUROPEAN

PROJECTION

ISSUE DATE

IEC

JEDEC

EIAJ

inches

2.65

0.30
0.10

2.45
2.25

0.49
0.36

0.32
0.23

13.0
12.6

7.6
7.4

1.27

10.65
10.00

1.1
1.0

0.9
0.4

8
0

0.25

0.1

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

Note

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

1.1
0.4

SOT163-1

detail X

0.25

075E04

MS-013AC

pin 1 index

0.10

0.012
0.004

0.096
0.089

0.019
0.014

0.013
0.009

0.51
0.49

0.30
0.29

0.050

1.4

0.055

0.419
0.394

0.043
0.039

0.035
0.016

0.01

0.25

0.01

0.004

0.043
0.016

0.01

10 mm

scale

(A )

SO20: plastic small outline package; 20 leads; body width 7.5 mm

SOT163-1

95-01-24
97-05-22

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

UNIT

max.

(1)

REFERENCES

OUTLINE

VERSION

EUROPEAN

PROJECTION

ISSUE DATE

IEC

JEDEC

EIAJ

inches

2.65

0.30
0.10

2.45
2.25

0.49
0.36

0.32
0.23

18.1
17.7

7.6
7.4

1.27

10.65
10.00

1.1
1.0

0.9
0.4

8
0

0.25

0.1

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

Note

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

1.1
0.4

SOT136-1

detail X

(A )

0.25

075E06

MS-013AE

pin 1 index

0.10

0.012
0.004

0.096
0.089

0.019
0.014

0.013
0.009

0.71
0.69

0.30
0.29

0.050

1.4

0.055

0.419
0.394

0.043
0.039

0.035
0.016

0.01

0.25

0.01

0.004

0.043
0.016

0.01

10 mm

scale

SO28: plastic small outline package; 28 leads; body width 7.5 mm

SOT136-1

95-01-24
97-05-22

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

17 SOLDERING

17.1

Plastic small outline packages

17.1.1

Y WAVE

During placement and before soldering, the component
must be fixed with a droplet of adhesive. After curing the
adhesive, the component can be soldered. The adhesive
can be applied by screen printing, pin transfer or syringe
dispensing.

Maximum permissible solder temperature is 260

C, and

maximum duration of package immersion in solder bath is
10 s, if allowed to cool to less than 150

C within 6 s.

Typical dwell time is 4 s at 250

A modified wave soldering technique is recommended
using two solder waves (dual-wave), in which a turbulent
wave with high upward pressure is followed by a smooth
laminar wave. Using a mildly-activated flux eliminates the
need for removal of corrosive residues in most
applications.

17.1.2

Y SOLDER PASTE REFLOW

Reflow soldering requires the solder paste (a suspension
of fine solder particles, flux and binding agent) to be
applied to the substrate by screen printing, stencilling or
pressure-syringe dispensing before device placement.

Several techniques exist for reflowing; for example,
thermal conduction by heated belt, infrared, and
vapour-phase reflow. Dwell times vary between 50 and
300 s according to method. Typical reflow temperatures
range from 215 to 250

Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 min at 45

17.1.3

EPAIRING SOLDERED JOINTS

(

BY HAND

HELD

SOLDERING IRON OR PULSE

HEATED SOLDER TOOL

)

Fix the component by first soldering two, diagonally
opposite, end pins. Apply the heating tool to the flat part of
the pin only. Contact time must be limited to 10 s at up to
300

C. When using proper tools, all other pins can be

soldered in one operation within 2 to 5 s at between 270
and 320

C. (Pulse-heated soldering is not recommended

for SO packages.)

For pulse-heated solder tool (resistance) soldering of VSO
packages, solder is applied to the substrate by dipping or
by an extra thick tin/lead plating before package
placement.

17.2

Plastic dual in-line packages

17.2.1

Y DIP OR WAVE

The maximum permissible temperature of the solder is
260

C; this temperature must not be in contact with the

joint for more than 5 s. The total contact time of successive
solder waves must not exceed 5 s.

The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified storage maximum. If the printed-circuit board has
been pre-heated, forced cooling may be necessary
immediately after soldering to keep the temperature within
the permissible limit.

17.2.2

EPAIRING SOLDERED JOINTS

Apply a low voltage soldering iron below the seating plane
(or not more than 2 mm above it). If its temperature is
below 300

C, it must not be in contact for more than 10 s;

if between 300 and 400

C, for not more than 5 s.

1995 May 01

Philips Semiconductors

Product specification

8-bit microcontrollers for
remote control transmitters

PCA84C122; 222; 422; 622; 822

18 DEFINITIONS

19 LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.

Data sheet status

Objective specification

This data sheet contains target or goal specifications for product development.

Preliminary specification

This data sheet contains preliminary data; supplementary data may be published later.

Product specification

This data sheet contains final product specifications.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.

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Internet: http://www.semiconductors.philips.com/ps/

For all other countries apply to: Philips Semiconductors,
International Marketing and Sales, Building BE-p,
P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands,
Telex 35000 phtcnl, Fax. +31-40-724825

SCD39

All rights are reserved. Reproduction in whole or in part is prohibited without the
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The information presented in this document does not form part of any quotation
or contract, is believed to be accurate and reliable and may be changed without
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other industrial or intellectual property rights.

Philips Semiconductors

Printed in The Netherlands

453041/1500/03/pp24

Date of release: 1995 May 01

Document order number:

9397 750 00102

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