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PDF SC2128A Data sheet ( Hoja de datos )
| Número de pieza | SC2128A | |
| Descripción | REMOTE FAN CONTROL IC | |
| Fabricantes | SL | |
| Logotipo |  |
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Silan
Semiconductors
REMOTE FAN CONTROL IC
www.DataSheet4U.com
DESCRIPTION
The SC2128A 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
* DIP or SO package(22 pin SO not available)
* Up to 3 dependent/independent swing-head/light output
* Available in 16,18,20,22,24 pin package for none, one set or two
sets of swing head and/or light control
* Four operation modes: ordinary, rhythm, ordinary sleep and
rhythm sleep.
* Memory start-up mode
* 2-3 seconds middle wind start-up(mask option)
APPLICATIONS
* Optimized for fan application
* Suitable for heater fan, cooling fan, and other home appliances
with remote control, timer and/or output level control
SC2128A
DIP-16
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2000.12.31
1
1 page  
Silan
Semiconductors
SC2128A
www.DataSheet4U.com
PIN DESCRIPTION
Pin No.
Symbol
20 20 22 24
16 18
I/O
PIN PIN PIN PIN
PIN PIN
Note1 Note2 Note3 Note4
Function
VDD 5 5 5 6 6 6 -- Positive power supply
VSS 2 2 2 3 3 3 -- Negative power supply
COM
10 12 14 13 15 17 O Indicator LED common output
LED1
13 15 17 16 18 20 O
LED2
12 14 16 15 17 19 O Indicator LED output pins
LED3
11 13 15 14 16 18 O
SPEED
7 7 7 8 8 8 I SPEED key control input
MODE
8 8 8 9 9 9 I MODE key control input
TIMER
9 11 13 12 14 16 I TIMER key control input
SW1
-- 9 9 10 10 10 I Swing head 1 control key input
SW2
-- -- -- 1 1 1 I Swing head 2 control key input
OFF/MEMS/
OFF control key input, shared with
6 6 6 7 7 7 I/O
BUZZ
buzzer output
LIGHT
-- -- 10 -- 11 11 I Light control key input
SO1
-- 10 12 11 13 15 O Swing head 1 output
SO2
-- -- -- 20 22 24 O Swing head 2 output
LIT -- -- 11 -- 12 14 O Light output
LO 16 18 20 19 21 23 O
MI 15 17 19 18 20 22 O Speed outputs
ST 14 16 18 17 19 21 O
REMOTE
1 1 1 2 2 2 I Remote control sensor input
OSCI
3 3 3 4 4 4 I Oscillator input pin
OSCO
4 4 4 5 5 5 O Oscillator output pin
NC -- -- -- -- -- 12 I No connection
NC -- -- -- -- -- 13 I No connection
Note1 : One swing head control plus light control type
Note2 : Two Sets of Swing Head Control Type
Note3 : DIP Package Only
Note4 : SO Package Only
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2000.12.31
5
5 Page 
Silan
Semiconductors
SC2128A
www.DataSheet4U.com
the final adjustments, regardless the adjustments are made from panel key or from remote control handset. One
exception is the SLEEP key available on the remote control handset. SLEEP key start or adjusts the fan to the
default sleep settings. Regardless the fan is started by SPEED or by MEMS, SLEEP key does not affect the
operation memory.
14. BUZZER OUTPUT
All valid key pressed except OFF/MEMS initiates a 150ms
duration 4kHz 50% duty cycle pulse train at OFF/MEMS/BUZZ
pin. OFF/MEMS key function as OFF key if pressed when fan is
in any on state. In this case, it does NOT initiate an output on
BUZZ. OFF/MEMS key functions as MEMORY-START key if
pressed when fan is in off state. In this case, it DOES initiate a
150ms duration 4kHz 50% duty cycle pulse train on BUZZ. Note
that when OFF/ MEMS/BUZZ outputs the pulse train, key input
is suppressed. That is, pressing OFF/MEMS key when the
buzzer is buzzing is NOT recognized by SC2128A. The
diagram right shows the buzzer connection.
VDD
SC2128A
OFF/MEMS/
BUZZ
VSS
OFF/MEMS key
-5V
15. REMOTE CONTROL DECODER
SC2128A is designed to be used together with SC2268 infrared ray remote control encoder. Such combination
allows up to 8 remote control keys – SPEED, MODE, TIMER, LIGHT, SLEEP, SW1, SW2, OFF/MEMS – to be
built on the remote control handset. 4 bits customer code, b3 ~ b6, is encoded by SC2268 and decoded by
SC2128A in order to avoid remote control contention between devices. With SC2268, b3 is determined by
bonding option; b4, b5 and b6 are determined by connecting respective c4, c5, c6 pin to VDD or VSS. With
SC2128A, b3 and b6 can be mask programmed upon customer request and with NRE.
The remote control signal coding scheme is fully
compatible with SC2268. Some description follows.
Please refer to specification of SC2268 for details.
When SC2128A receives a remote control signal at
its REMOTE pin, it decodes the received waveform
into consecutive “0” bits and “1” bits. It first
compares the received start word against its
customer code. If and only if the start word matches
the customer code, it then compares for two
consecutive and matched code words. It then
actuates the command according to the code words
table shown later.
Code bit:
"0" bit:
"1" bit:
0.625ms
1.875ms
2.5ms
Start/Code word:
b0 b1 b2 b3 b4 b5 b6 b7
Code frame
start word 1st code word 2nd code word
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2000.12.31
11
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