Silan
Semiconductors

SC2128C

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.1 2001.09.26

REMOTE FAN CONTROL IC

DESCRIPTION

The SC2128C is a high performance electronic fan controller LSI,

Speed control, off-timer, rhythm wind, sleep mode, head swing

and/or light control are all built into a single chip. Indicator LED

output, buzzer output, key control input, as well as remote control

decoding circuitry are all provided to build a full function electronic

fan with remote control capability having the highest performance

with the least external components. Pin assignment and application

circuit are optimized for easy PCB layout and cost saving for

electronic fan application.

FEATURES

* High performance CMOS Technology

* Low power consumption

* Optional independent light control

* 90 seconds cycle/6 seconds per step(off step 3 seconds) rhythm

wind pattern

* Built-in remote control decoding circuitry with mask option

custom code

* Available in 16,18,20,22,24 pin package for none, one set or two

sets of swing head and/or light control

* Two sets of swing head and/or light control

* Three operation modes: ordinary, rhythm and rhythm sleep.

DIP-24-300-2.54

APPLICATIONS

* Optimized for fan application

* Suitable for heater fan, cooling fan,

and other home appliances with remote

control, timer and/or output level control

PIN CONFIGURATION

SC2128C

REMOTE

OSCI

OSCO

OFF/BUZZ

SPEED

MODE

LORD

COM

LED3

LED2

LED1

LIT

SO1

TIMER

SO2

LIGHT

SW1

Silan
Semiconductors

SC2128C

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.1 2001.09.26

ORDERING INFORMATION

SC2128C- X X X X

S = Swing Head Output(s) Controlled by a Single Key (Mask
Option)

D = Two Swing Head Outputs Controlled by Double Keys (D can be
omitted)

0 = No Swing head Output

1 = 1 Swing head Output

2 = 2 Swing head Outputs

3 = 1 Swing head & Light Control Outputs

4 = 2 Swing head & Light Control Outputs

2 = 1/2/4 Hour, Non-Accumulated Timer

3 = 1/2/4 Hour, Accumulated Timer

4 = 0.5/1/2/4 Hour, Non-Accumulated
Timer

5 = 0.5/1/2/4 Hour, Accumulated Timer

8 = 1/2/4/8 Hour, Non-Accumulated Timer

9 = 1/2/4/8 Hour, Accumulated Timer

D = Non-Memory Start-up & Non-Middle Wind Start-up (Mask
Option)

C = Non-Memory Start-up & Middle Wind Start-up

L = Memory Start-up & Non-Middle Wind Start-up (Mask Option)

M = Memory Start-up & Middle Wind Start-up

Note: SC2128C Standard ICs: SC2128C-C41, SC2128C-C51, Other options are available upon request and

require a minimum order Quantity. Please contact Silan or your local agent for details.

BLOCK DIAGRAM

OSC

TIMING

SPEED

CONTROL

FILTER

DECODER

KEY

SENSE

MEMORY

TIMER

LED

SCAN

SWING/

LIGHT

OSCO

OSCI

REMOTE

SPEED

TIMER

MODE

SW1

SW2

OFF/MEMS/

BUZZ

LIGHT

LIT

SO1

SO2

LED2

LED3

LED1

COM

Silan
Semiconductors

SC2128C

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.1 2001.09.26

ABSOLUTE MAXIMUM RATINGS

Characteristic

Symbol

Test Conditions

Value

Unit

Supply Voltage

0 ~ 6.0

Input/Output Voltage

, V

- V

-0.3V ~ V

+0.3V

Power Dissipation

� V

= 5.0

500

Operating Temperature

Topr

-20 ~ +70

�C

Storage Temperature

Tstg

-40 ~ +125

�C

ELECTRICAL CHARACTERISTICS

Parameter

Symbol

Test conditions

Min

Typ

Max

Unit

Supply Voltage

4.0

5.0

6.0

Stand-by Current

=5.0V, Oscillator stops.

All output floating,

All input fixed to V

134

200

�A

Input High Level Voltage

-1.5

Input Low Level Voltage

1.5

Drive Current (COM)

=5.0V, Vo=3.5V

21.5

Sink Current (COM)

=5.0V, Vo=1.5V

-12

-16.5

Drive Current(LED1, LED2, LED3)

=5.0V, Vo=3.5V

6.5

Sink Current(LED1, LED2, LED3)

=5.0V, Vo=1.5V

-4

-5.7

Drive Current (OFF/BUZZ)

=5.0V, Vo=2.5V

1.5

3.0

Sink Current (OFF/BUZZ)

=5.0V, Vo=2.5V

-2

-3.7

Sink Current

(LO,MI,ST,SO1, SO2,LIT)

=5.0V, Vo=2.5V

-6.5

-16

Oscillation frequency

OSC

32768

Key Press Duration

key

Remote Input Bit Duration

bit

2.0

2.5

3.0

Silan
Semiconductors

SC2128C

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.1 2001.09.26

PIN DESCRIPTION

Pin No.

Symbol

I/O

Function

No connection

REMOTE

Remote control sensor input

Negative power supply

OSCI

Oscillator input Pin

OSCO

Oscillator output Pin

Positive power supply

OFF/BUZZ

I/O

OFF control key input, shared with buzzer output

SPEED

SPEED key control input

MODE

MODE key control input

SW1

Swing head 1 control key input

LIGHT

Light control key input

No connection

LORD

Ordinary wind indicator LED output

LIT

Light output

SO1

Swing head 1 output

TIMER

TIMER key control input

COM

Indicator LED common output

LED3

Indicator LED output Pin

LED2

Indicator LED output Pin

LED1

Indicator LED output Pin

(Strong) Speed output Pin

(Middle) Speed output Pin

(Low) Speed output Pin

SO2

Swing head 2 output

FUNCTIONAL DESCRIPTION

1. CONTROL KEYS

Up to six(6) function keys � SPEED, MODE, TIMER, SW1, LIGHT and OFF/MEMS � may be used on the

control panel of fan to access SC2128C to its full versatility. OFF/BUZZ key input pin serves further as buzzer

output BUZZ pin. All key inputs are internally pulled-high in SC2128C.

SPEED key controls the fan speed. TIMER key adjusts off-timer. MODE key sets fan into various modes of

operation. SW1 key control the head swing of fan. LIGHT key toggles the LIT output ON and OFF. OFF/BUZZ key

resets the fan to idle state when fan is ON. LIT output is not affected by OFF key.

Silan
Semiconductors

SC2128C

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.1 2001.09.26

2. SPEED KEY

SPEED key is used to (1) turn on the fan (2) change speed of the fan. SLEEP key my turn on the fan from remote

control handset. All the other key scan NOT turn on the fan. All the other keys, except LIGHT key, can NOT

operate until fan is turned on. The diagram shows the state transition of SC2128C for successive pressing of

SPEED key.

OFF

LO=Z

MI=Z

ST=Z

MI start

LO=Z

MI=L

ST=Z

LOW

LO=L

MI=Z

ST=Z

MID

LO=Z

MI=L

ST=Z

STR

LO=Z

MI=Z
ST=L

SPEED KEY

2-3 sec, delay

D K

SPEED KEY

EED

KEY

Z=high impedence
L=low voltage

Middle wind start-up optioned

3. TIMER KEY

TIMER key is used to set time schedule after which SC2128C will automatically restore off state(off-timer).

When the fan is on, pressing TIMER key sets up the off-timer. Each pressing of TIMER key increases the

timer by one step. Each time increment step is determined by various timer options. Either 0.5 or 1 hour

per step may be selected, and either 3 levels or 4 levels timer may be selected. Please see TIMER section

for details.

4. MODE KEY

MODE key is used to bring SC2128C around ORD

(ordinary wind) mode, RTM (rhythm wind ) mode and

RSL(rhythm sleep wind ) mode. In ORD mode, the wind

speed is set by SPEED key and does not change as

time passes. In RTM mode the wind speed cycles

through three rhythm wind, patterns as set by the

SPEED key. In RSL mode, however, the fan

automatically steps down one level (strong to middle,

middle to low) every 30 minutes and keeps in low wind

until off-timer times out. Four modes of operation are

described in details later.

OFF

ORD

RTM

RSL

SPEED KEY

KEY

MODE KEY

Электронный компонент: SC2128C-D20S