VISHAY
TFDU4300
Document Number 82614
Rev. 1.4, 26-Jan-04
Vishay Semiconductors
www.vishay.com
1
18065
Infrared Transceiver Module (SIR, 115.2 kbit/s)
for IrDA
applications
Description
The TFDU4300 is a low profile (2.5 mm) infrared
transceiver module with independent logic reference
voltage (V
logic
) for low voltage IO interfacing. It is
compliant to the latest IrDA physical layer standard for
fast infrared data communication, supporting IrDA
speeds up to 115.2 kbit/s (SIR) and carrier based
remote control. The transceiver module consists of a
PIN photodiode, an infrared emitter (IRED), and a
low-power control IC to provide a total front-end solu-
tion in a single package. This device covers an
extended IrDA low power range of close to 1 m. With
an external current control resistor the current can be
adjusted for shorter ranges.
This Vishay SIR transceiver is built in a new smaller
package using the experiences of the lead frame
BabyFace technology.
The Rxd output pulse width is independent of the opti-
cal input pulse width and stays always at a fixed pulse
width thus making the device optimum for standard
Endecs. TFDU4300 has a tri-state output and is float-
ing in shut-down mode with a weak pull-up.
Features
Compliant to the latest IrDA physical layer
specification (9.6 kbit/s to 115.2 kbit/s) and TV
Remote Control, bi-directional operation included.
Operates from 2.4 V to 5.5 V within specification
over full temperature range from - 30 C to + 85 C
Logic voltage 1.5 V to 5.5 V is independent of
IRED driver and analog supply voltage
Split power supply, transmitter and receiver can be
operated from two power supplies with relaxed
requirements saving costs, US Patent No.
6,157,476
Extended IrDA Low Power Range to about 70 cm
Typical Remote Control Range 12 m
Low Power Consumption
(< 0.12 mA Supply Current)
Power Shutdown Mode (< 5
A Shutdown Current
in Full Temperature Range, up to 85 C)
Surface Mount Package, low profile (2.5 mm)
- (L 8.5 mm H 2.5 mm W 2.9 mm)
High Efficiency Emitter
Low Profile (Universal) Package Capable of
Surface Mount Soldering to Side and Top View
Orientation
Directly Interfaces with Various Super I/O and
Controller Devices as e.g. TOIM4232
Tri-state-Receiver Output, floating in shut down
with a weak pull-up
Compliant with IrDA Background Light
Specification
EMI Immunity in GSM Bands > 300 V/m verified
Applications
Ideal for Battery Operated Applications
Telecommunication Products
(Cellular Phones, Pagers)
Digital Still and Video Cameras
Printers, Fax Machines, Photocopiers, Screen
Projectors
Medical and Industrial Data Collection
Diagnostic Systems
Notebook Computers, Desktop PCs,
Palmtop Computers (Win CE, Palm PC), PDAs
Internet TV Boxes, Video Conferencing Systems
External Infrared Adapters (Dongles)
Data Loggers
GPS
Kiosks, POS, Point and Pay Devices including
IrFM - Applications
www.vishay.com
2
Document Number 82614
Rev. 1.4, 26-Jan-04
VISHAY
TFDU4300
Vishay Semiconductors
Parts Table
Functional Block Diagram
Pin Description
Part
Description
Qty / Reel
TFDU4300-TR1
Oriented in carrier tape for side view surface mounting
750 pcs
TFDU4300-TR3
Oriented in carrier tape for side view surface mounting
2500 pcs
TFDU4300-TT1
Oriented in carrier tape for top view surface mounting
750 pcs
TFDU4300-TT3
Oriented in carrier tape for top view surface mounting
2500 pcs
Controlled Driver
Push-Pull
Driver
GND
Txd
Rxd
Vcc2
Vcc1
Amplifier
Comparator
SD
V
logic
Logic
&
Control
RED C
18282
Pin Number
Function
Description
I/O
Active
1
V
CC2
IRED Anode
Connect IRED anode directly to the power supply (V
CC2
). IRED
current can be decreased by adding a resistor in series between the
power supply and IRED anode. A separate unregulated power
supply can be used at this pin.
2
IRED Cathode
IRED Cathode, internally connected to the driver transistor
3
Txd
This Schmitt-Trigger input is used to transmit serial data when SD
is low. An on-chip protection circuit disables the LED driver if the
Txd pin is asserted for longer than 300
s. The input threshold
voltage adapts to and follows the logic voltage swing defined by the
applied V
logic
voltage.
I
HIGH
4
Rxd
Received Data Output, push-pull CMOS driver output capable of
driving standard CMOS or TTL loads. During transmission the Rxd
output is inactive. No external pull-up or pull-down resistor is
required. Floating with a weak pull-up of 500 k
(typ.) in shutdown
mode. The voltage swing is defined by the applied V
logic
voltage
O
LOW
5
SD
Shutdown. The input threshold voltage adapts to and follows the
logic voltage swing defined by the applied V
logic
voltage.
I
HIGH
6
V
CC1
Supply Voltage
7
V
logic
V
logic
defines the logic voltage level of the I/O ports to adap the logic
voltage swing to the IR controller. The Rxd output range is from 0 V
to V
logic
, for optimum noise suppression the inputs- logic decision
level is 0.5 x V
logic
I
8
GND
Ground
VISHAY
TFDU4300
Document Number 82614
Rev. 1.4, 26-Jan-04
Vishay Semiconductors
www.vishay.com
3
Pinout
TFDU4300
weight 75 mg
Definitions:
In the Vishay transceiver data sheets the following nomenclature is
used for defining the IrDA operating modes:
SIR: 2.4 kbit/s to 115.2 kbit/s, equivalent to the basic serial infrared
standard with the physical layer version IrPhy 1.0
MIR: 576 kbit/s to 1152 kbit/s
FIR: 4 Mbit/s
VFIR: 16 Mbit/s
MIR and FIR were implemented with IrPhy 1.1, followed by IrPhy
1.2, adding the SIR Low Power Standard. IrPhy 1.3 extended the
Low Power Option to MIR and FIR and VFIR was added with IrPhy
1.4.A new version of the standard in any case obsoletes the former
version.
With introducing the updated versions the old versions are obso-
lete. Therefore the only valid IrDA standard is the actual version
IrPhy 1.4 (in Oct. 2002).
Absolute Maximum Ratings
Reference point Ground (pin 8) unless otherwise noted.
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
18101
1
2
3
4
5
6
7
8
IRED A
Txd
Rxd
SD
Vcc Vlog GND
IRED C
Parameter
Test Conditions
Symbol
Min
Typ.
Max
Unit
Supply voltage range,
transceiver
- 0.3 V < V
CC2
< 6 V
- 0.5 V < V
logic
< 6 V
V
CC1
- 0.5
+ 6.0
V
Supply voltage range,
transmitter
- 0.5 V < V
CC1
< 6 V
- 0.5 V < V
logic
< 6 V
V
CC2
- 0.5
+ 6.0
V
Supply voltage range, V
logic
- 0.5 V < V
CC1
< 6 V
- 0.3 V < V
CC2
< 6 V
V
logic
- 0.5
+ 6.0
V
Rxd output voltage
- 0.5 V < V
CC1
< 6 V
- 0.3 V < V
logic
< 6 V
V
Rxd
- 0.5
V
logic
+ 0.5
V
Voltage at all inputs
Note: V
in
V
CC1
is allowed
V
IN
- 0.5
+ 6.0
V
Input current
for all pins, except IRED anode
pin
10
mA
Output sinking current
25
mA
Power dissipation
see derating curve
P
D
250
mW
Junction temperature
T
J
125
C
Ambient temperature range
(operating)
T
amb
- 30
+ 85
C
Storage temperature range
T
stg
- 40
+ 100
C
Soldering temperature
see recommended solder profile
240
C
Average output current, pin 1
I
IRED(DC)
125
mA
Repetitive pulsed output
current, pin 1 to pin 2
t < 90
s, t
on
< 20 %
I
IRED(RP)
600
mA
www.vishay.com
4
Document Number 82614
Rev. 1.4, 26-Jan-04
VISHAY
TFDU4300
Vishay Semiconductors
Eye safety information
*)
Due to the internal limitation measures the device is a "class 1" device under all conditions.
**)
IrDA specifies the max. intensity with 500 mW/sr.
Parameter
Test Conditions
Symbol
Min
Typ.
Max
Unit
Virtual source size
Method: (1-1/e) encircled
energy
d
1.3
1.8
mm
Maximum intensity for class 1
IEC60825-1 or EN60825-1,
edition Jan. 2001, operating
below the absolute maximum
ratings
I
e
*)
(500)
**)
mW/sr
VISHAY
TFDU4300
Document Number 82614
Rev. 1.4, 26-Jan-04
Vishay Semiconductors
www.vishay.com
5
Electrical Characteristics
Transceiver
Tested @ T
amb
= 25 C, V
CC1
= V
CC2
= 2.7 V to 5.5 V unless otherwise noted.
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
*)
Standard illuminant A
**)
To provide an improved immunity with increasing V
logic
the typical threshold level is increasing with V
logic
and set to 0.5 x V
logic
. It is
recommended to use the specified min/max values to avoid increased operating current.
Parameter
Test Conditions
Symbol
Min
Typ.
Max
Unit
Supply voltage
Remark: For 2.4 V < V
CC1
<
2.6 V @ T
amb
< - 25 C a minor
reduction of the receiver
sensitivity may occur
V
CC1
2.4
5.5
V
Idle supply current @ V
CC1
(receive mode, no signal)
SD = Low, E
e
= 1 klx
*)
,
T
amb
= - 25 C to + 85 C,
V
CC1
= V
CC2
= 2.7 V to 5.5 V
I
CC1
90
130
A
SD = Low, E
e
= 1 klx
*)
,
T
amb
= 25 C,
V
CC1
= V
CC2
= 2.7 V to 5.5 V
I
CC1
75
A
Idle supply current @ V
logic
(receive mode, no signal)
SD = Low, E
e
= 1 klx
*)
, V
log
,
pin 7, no signal, no load @ Rxd
I
log
1
A
Average dynamic supply
current, transmitting
I
IRED
= 300 mA, 20 % Duty
Cycle
I
CC
65
mA
Standby supply current
SD = High, T = 25 C, E
e
= 0 klx
I
SD
0.1
A
SD = High, T = 70 C
I
SD
2
A
SD = High, T = 85 C
I
SD
3
A
Standby supply current, V
logic
no signal, no load
I
log
1
A
Operating temperature range
T
A
- 30
+ 85
C
Output voltage low, Rxd
C
Load
= 15 pF
V
OL
- 0.5
0.15 x V
logic
V
Output voltage high, Rxd
I
OH
= - 500
A
V
OH
0.8 x V
logic
V
logic
+ 0.5
V
I
OH
= - 250
A, C
Load
= 15 pF
V
OH
0.9 x V
logic
V
logic
+ 0.5
V
Rxd to V
CC1
impedance
R
Rxd
400
500
600
k
Input voltage low (Txd, SD)
V
IL
- 0.5
0.5
V
Input voltage high (Txd, SD)
CMOS level
**)
V
IH
V
logic
- 0.5
6
V
Input leakage current (Txd, SD)
V
IN
= 0.9 x V
logic
I
ICH
- 2
+ 2
A
Controlled pull down current
SD, Txd = "0" to "1",
V
IN
< 0.15 V
logic
I
IRTx
+ 150
A
SD, Txd = "0" to "1",
V
IN
> 0.7 V
logic
I
IRTx
- 1
0
1
A
Input capacitance (Txd, SD)
C
IN
5
pF
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