Datasheet SC2128A Datasheet (Silan Semiconductors)

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Semiconductors

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REMOTE FAN CONTROL IC

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.

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SC2128A

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

DIP-16

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PIN CONFIGURATION

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SC2128A

SW2

REMOTE

VSS

OSCI

OSCO

16 pin

18 pin

20 pin

VDD

OFF/MEMS/

BUZZ

SPEED

MODE

SW1

LIGHT

SC2128A

NC

SO2

LO

MI

ST

LED1

LED2

LED3

COM

TIMER

SO1

LIT

NC

20 pin

22 pin DIP

24 pin SO

ORDERING INFORMATION

SC2128A- XXXX

S = SwingHeadOutput(s)Controlled by a SingleKey (Mask
Option)

D = Two Swing Head Outputs Controlled by Double Keys(Dcan be

omitted)
0 = No Swing head Output
1 = 1 SwingheadOutput
2 = 2 SwingheadOutputs
3 = 1 Swinghead&LightControl Outputs
4 = 2 Swinghead&LightControl Outputs

2 = 1/2/4 Hour,Non-Accumulated Timer
3 = 1/2/4 Hour,AccumulatedTimer

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-MemoryStart-up & Non-MiddleWind Start-up (Mask
Option)

C = Non-MemoryStart-up & MiddleWind Start-up
L = Memory Start-up& Non-Middle Wind Start-up(Mask Option)
M = MemoryStart-up & Middle Wind Start-up

Note: SC2128A Standard ICs: SC2128A-C31, SC2128A-C51, SC2128A-C80, SC2128A-C81, SC2128A-C82,

SC2128A-C83, SC2128A-C92. Other options are available upon reque st and require a minimum order
Quantity. Please contact Silan or your local agent for details.

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BLOCK DIAGRAM

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V

DDVSS

SC2128A

OSCI

OSCO

REMOTE

SPEED

TIMER

MODE

SW1
SW2

OFF/MEMS/
BUZZ

LIGHT LIT

OSC TIMING

FILTER DECODER

TIMER

KEY

SENSE

MEMORY

SPEED

CONTROL

LED

SCAN

SWING/

LIGHT

LO

MI

ST

COM
LED1
LED2
LED3

SO1

SO2

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ABSOLUTE MAXIMUM RATINGS

Characteristic Symbol Test Conditions Value Unit

Supply Voltage V
Input/Output Voltage VI,V
PowerDissipation P
Operating Temperature Topr -- -20 ~ +70 °C
Storage Temperature Tstg -- -40 ~ +125 °C

DD

O

D

-- 0 ~ 6.0 V

VDD-V

SS

VDD–VSS= 5.0 500 mW

ELECTRICAL CHARACTERISTICS

Parameter Symbol Test conditions Min Typ Max Unit

Supply Voltage V

Stand-by Current Iq

Input High Level Voltage V
Input Low Level Voltage V
Drive Current (COM) I
Sink Current (COM) I
Drive Current (LED1, LED2,
LED3)
Sink Current (LED1, LED2, LED3) I
Drive Current (OFF/BUZZ) I
Sink Current (OFF/BUZZ) I
Sink Current
(LO,MI,ST,SO1, SO2,LIT)
Oscillation frequency f
Key Press Duration T
Remote Input Bit Duration T

-- 4.0 5.0 6.0 V

DD

V

=5.0V, Oscillator stops.

DD

All output floating,
All input fixed to V

-- VDD-1.5 -- -- V

IH

-- -- -- 1.5 V

IL

VDD=5.0V, Vo=3.5V 15 21.5 -- mA

OH

VDD=5.0V, Vo=1.5V -12 -16.5 -- mA

OL

VDD=5.0V, Vo=3.5V 5 6.5 --

I

OH

VDD=5.0V, Vo=1.5V -4 -5.7 -- mA

OL

VDD=5.0V, Vo=2.5V 1.5 3.0 -- mA

OH

VDD=5.0V, Vo=2.5V -2 -3.7 -- mA

OL

I

VDD=5.0V, Vo=2.5V -6.5 -16 -- mA

OL

-- -- 32768 -- Hz

OSC

-- 80 -- -- ms

key

-- 2.0 2.5 3.0 ms

bit

DD

.

SC2128A

-0.3V ~ VDD+0.3V V

-- 134 200 µA

mA

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PIN DESCRIPTION

Pin No.

20

20

22

Symbol

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
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/
BUZZ
LIGHT -- -- 10 -- 11 11 I Light control key input
SO1 -- 10 12 11 13 15 O
SO2 -- -- -- 20 22 24 O
LIT -- -- 11 -- 12 14 O Light output
LO 16 18 20 19 21 23 O
MI 15 17 19 18 20 22 O
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

16

18

PIN

PIN

PIN

PIN

Note1

Note2

666777I/O

PIN

Note3

24

PIN

Note4

I/O Function

Indicator LED output pins

OFF control key input, shared with
buzzer output

Swing head 1 output
Swing head 2 output

Speed outputs

SC2128A

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FUNCTIONAL DESCRIPTION

1. CONTROL KEYS

Up to seven function keys – SPEED, MODE, TIMER, SW1, SW2, LIGHT and OFF/MEMS – may be used on
the control panel of fan to access SC2128A to its full versatility. OFF/MEMS key input pin serves further as buzzer
output BUZZ pin. All key inputs are internally pulled-high in SC2128A.

SPEED key controls the fan speed. TIMER key adjusts off-timer. MODE key sets fan into various modes of
operation. SW1 and SW2 keys control the head swing of fan. LIGHT key toggles the LIT output ON and OFF.
OFF/MEMS key resets the fan to idle state when fan is ON. It starts fan into memory mode if pressed when fan is
OFF, provided memory option is enabled. LIT output is not affected by OFF key.

2. SPEED KEY

SPEED key is used to (1) turn on the fan (2) change speed of the fan. OFF/MEMS may also be used to turn on
the fan into memory mode, provided memory mode is enabled. SLEEP key my turn on the fan from remote
control handset. All the other keys can 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 SC2128A for successive pressing of
SPEED key.

SC2128A

MI start

Y

E

LO=Z

K

D

E

E

P

S

OFF

LO=Z
MI=Z
ST=Z

not middle wind start-up optioned

MI=L

ST=Z

SPEED KEY

SPEED KEY

LOW

LO=L
MI=Z
ST=Z

Y

E

K

D

E

E

P

S

Z=high impedence
L=low voltage

S

PEE

D

KEY

MID

LO=L
MI=Z
ST=Z

STR

LO=L
MI=Z
ST=Z

SPEED KEY

3. TIMER KEY

TIMER key is used to set time schedule after which SC2128A 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.

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4. MODE KEY

MODE key is used to bring SC2128A around ORD
(ordinary wind) mode, RTM(rhythm wind ) mode, SLP
(sleep 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 SLP and 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.

5. SW1 and SW2 KEYS

SW1 and SW2 keys control the output status of SO1 and
SO2 outputs which in turn control the head swing of fan.
Depending on the 2SW mask option, SO2 is controlled by
either SW1 or SW2 key. If 2SW option is selected each
pressing of SW1 key toggles SO1 ON(L) and OFF(Z) and
each pressing of SW2 key toggles SO1 ON(L) and OFF(Z).
If 2SW option is not selected, pressing SW1 key cycles
SO1 and SO2 output as shown in the diagram and SW2
key has no effect. 2SW option is described later.

6. LIGHT KEY

LIGHT key toggles LIT output on(L) and off(Z). LIT output can only be controlled with LIGHT key (from both
panel and remote control) and SLEEP key (if available) on remote control handset. OFF key does NOT affect LIT
output. LIT output is NOT affected by OFF key as well as off-timer times out.

SPEED KEY

OFF ORD

S

SO1=Z
SO2=Z

S

SC2128A

DE KEY

O

M

MO

D

E

KEY

SO1=L

Y

E

SO2=Z

K

1

W

Fan already ON

Z=high impedence

L=low voltage

W

1

SO1=L

K

E

SO2=L

Y

RTM

RSL

S

M

W

1

K

E

1

W

S

O

DE KEY

M

Y

SO1=Z
SO2=L

Y

E

K

SLP

DE KEY

O

7. OFF/MEMS KEY

OFF/MEMS key functions differently depending on whether the fan is ON or OFF. It functions as OFF key when
the fan is ON, and is used to bring SC2128A from any on state into off state. LIT output is NOT affected by OFF
key.When fan is OFF,it functions as MEMS (memory start) and is used to turn on the fan and set to the memory
mode, provided memory mode is enabled. Memory mode is explained later in the MEMORY MODE section.

8. INDICATOR LEDS

Up to twelve(12) indicator LEDs may be constructed on the control panel of fan built with SC2128A. Six(6)
LEDs are constructed as 3x2 LED matrix formed by COM and LED1, LED2, LED3. The other six(6)LEDs are built
in series with TRIAC outputs. The diagrams show how the LED matrix is constructed.

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V

DD

COM

Tb0

LED3

LED2

LED1

V

SS

Tb1 Tb2 Tb3 Sleep

-5V

SC2128A

* Four LEDs (Tb0, Tb1, Tb2, Tb3) are used to indicate the off-timer period. Depending on the base timer step
option, timer step may be 0.5 hour or 1 hour as indicated in the diagram.

If SC2128A is selected with 4 hour timer

Rhythm

SC2128A

option

SC2128A

LO

MI

ST

SO1

SO2

LIT

Tb0=0.5 hour

b1=1 hour
b2=2 hour
b3=4 hour

low

middle

strong

Swing 1

Swing 2

light

If SC2128A is selected with 8 hour timer

option

Tb0=1 hour

b1=2 hour
b2=4 hour
b3=8 hour

The time schedule is the sum of all ON LEDs. For example, if SC2128A is programmed with 0.5/1/2/4 hour
accumulated timer option, and is Tb0 is ON, Tb1 is OFF, Tb2 is OFF, Tb3 is ON, then the schedule period is 4.5
hours (0.5 hr + 4 hr).

* Rhythm LED and Sleep LED indicate SC2128A operation modes.

Operation mode Rhythm LED Sleep LED

ORD (ordinary wind) OFF OFF
RTM (rhythm wind) ON OFF
SLP (sleep wind) OFF ON
RSL (rhythm sleep wind) ON ON

* Three LEDs – Low, Middle and Strong – are used to indicate the respective output status of LO, MI, ST output.
LED being ON indicates output active (L). LED being OFF indicates output inactive (Z). Only one output among
LO, MI and HI may be active at a specific time.

* Swing1 LED, Swing2 LED and Light LED indicated respective output status of SO1, SO2, and LIT.

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9. TIMER

The external timer of SC2128A may be bonding optioned into
six (6) configurations as shown. Each pressing of TIMER key will
step the internal timer one step up. The actual sequence
depends on the TIMER option selected. The following diagrams
show the timer sequence for each TIMER option. TIMER
automatically counts down as time passes by. The count down
sequence reverses the key sequence and is also shown in the
following diagrams.

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SC2128A

:0.5,1,2,4hoursnon-accumulated

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:1,2,4,8hoursnon-accumulated



:0.5,1,2,4hoursaccumulated



: 1, 2, 4, 8 hours accumulated



:1,2,4hoursnon-accumulated



:1,2,4hoursaccumulated



TIMER

0.5hr

4+
2+

0.5

None

TIMER TIMER

0.5 1

1hr

R

TIMER

E

M

I

T

4hr

(2)

TIMER

2

0.5hr

TIMER

4+

2

0.5hr

2+

0.5

TIMER

0.5hr

1hr

r

h

2

24

TIMER

0.5hr

4+
1+

0.5

TIMER TIMER

None

0.5hr

R

E

M

I

T

TIMER TIMER

None

0.5hr

T

I

M

E

R

0.5hr

0.5 1

h

5

.

0

TIMER

24

2hr

(1)

0.5 1

0.5hr

4+
2+
1+

0.5

r

TIMER

0.5hr

T

I

M

E

R

TIMER

1+

0.5

0.5hr
TIMER

4+
2+

1

0.5hr

(3)

TIMER TIMER

None

1hr

T

I

M

E

R

1

TIMER

2+

2

1hr

TIMER

8+
4+
2+

1

1

1hr

TIMER
8+
4+

2

1hr

1hr

TIMER

1hr

8+
4+

1

4

TIMER

1hr

TIMER

1hr

8+

TIMER

4+

1

1hr

TIMER

8+
2+

4

1

1hr

(4)

10. RHYTHM WIND

SC2128Afeatures rhythm wind mode. It can be set into
rhythm wind mode by pressing MODE key. Furthermore,
there are three levels – strong, middle and low rhythm
wind. Pressing SPEED key cycles SC2128A around the
three levels, from low to middle, middle to strong, then
strong to low. Initial rhythm wind level on entering
RHYTHM wind mode is the same as the ordinary wind
level while leaving ORDINARY wind mode and entering
RHYTHM wind mode. The right diagram depicts the
strong, middle and low rhythm wind patterns.

I

M
E
R

2+

1

TIMER

0.5hr

4+

2

TIMER

1hr

TIMER TIMER

T

TIMER

0.5hr

4+

1

TIMER

1hr

8+

2

2+
1+

0.5

TIMER

0.5hr

4+
2+

1

TIMER

1hr

None

TIMER

0.5hr

4+

0.5

TIMER

1hr

8+

1

T

5

.

0

h

1

1hr

I

M

E

r

h

r

R

4

T

I

M

E

R

8

T

I

M
E
R

1 2

ST

MI

LO

t=0 Strong rhythm wind pattern

ST

MI

LO

t=0

Middle rhythm wind pattern

ST

MI

LO

t=0

Low rhythm wind pattern

1hr

TIMER
4+
2+

1

None

TIMER TIMER

1hr

1hr

TIMER

4+

2

1hr

(6)

TIMER

1 2

1hr

T

I

M

E

R

(5)

1hr

2+

1

TIMER

1hr

4

4

1hr

r

T

h

I

M

1

E

R

4+

1

r

T

h

I

M

2

E

R

seconds

t=90

seconds

t=90

seconds

t=90

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11. SLEEP WIND MODE

In sleep wind mode, the wind speed steps down
automatically one level every 30 minutes, until it reaches
low wind level. If no off-timer is set, SC2128A keeps in
low wind level. Otherwise, it restores off state when
off-timer times out. To enter sleep wind mode, turn on
the fan by SPEED key first. Adjust to desired LO, MI, ST
wind speed. Press MODE key twice to bring SC2128A
to LOW, MIDDLE or STRONG sleep wind mode as the
LO, MI, ST wind speed set before entering sleep w ind
mode. Press MODE key in sleep wind mode forces
SC2128A to leave sleep wind mode and enter rhythm
sleep wind mode.

12. RHYTHM SLEEP WIND MODE

Pressing MODE key in sleep wind mode brings
SC2128A into rhythm sleep wind. In rhythm sleep wind
mode, SC2128A outputs LOW, MIDDLE or STRONG
rhythm wind pattern and automatically steps down one
level every 30 minutes until it reaches low rhythm wind
level. If no off-timer is set, SC2128A keeps in low rhythm
wind output. Otherwise it restores off state when the
off-timer times out.

13. MEMORY MODE

SC2128A features on-chip operation memory, in which operation state may be stored. OFF/MEMS key also
functions as a special MEMS(memory start) key. If this key is pressed when SC2128A is in off state, SC2128A is
activated into the operation mode stored in the operation memory. After power on, the operation memory is
initialized as follows:

middle speed, ordinary wind, none off-timer setting, SO1 and SO2 swing head outputs both

off, LIT output off.

Operation memory memorizes the following:

(1)

SPEED low, middle or strong,

(2)

MODE ordinary, rhythm, sleep or rhythm sleep.

(3)

OFF-TIMER: off-timer setting,

(4)

SWING HEAD SO1 and SO2 output state,

(5)

LIGHT LIT output status.

ST

MI

LO

t=0 t=0.5hr t=1.0hr

ST

MI

LO

t=0 t=0.5hr t=1.0hr

ST

MI

LO

t=0 t=0.5hr t=1.0hr

Strong rhythmwind
Middle rhythmwind

Low rhythmwind

Strong rhythmwind
Middle rhythmwind

Low rhythmwind

Strong rhythmwind
Middle rhythmwind

Low rhythmwind

Strong sleep mode wind pattern

Middle sleep mode wind pattern

Low sleep mode wind pattern

t=0 t=0.5hr t=1.0hr timer timeout

Strong rhythm sleep mode wind pattern

t=0 t=0.5hr t=1.0hr timer timeout

Middle rhythm sleep m odewind pattern

t=0 t=0.5hr t=1.0hr timer timeout

SC2128A

timer timeout

timer timeout

timer timeout

Low rhythmsleep mode wind pattern

hours

hours

hours

hours

hours

hours

If the fan is turned on by SPEED key, subsequent adjustments to the fan operation either from pannel key or
from remote control handset do not affect the operation memory. If, however, the fan is turned on by MEMS, the
subsequent adjustments to speed, mode, off-timer, SO1, SO2 and LIT output will update the operation memory to

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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.

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 V
SC2128A, b3 and b6 can be mask programmed upon customer request and with NRE.

V

SC2128A

OFF/MEMS/

BUZZ

V

SC2128A

DD

OFF/MEMS ke

SS

-5V

DD or VSS.With

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

"0" b it:

"1" b it:

Code bit:

0.625ms

1.875ms

2.5ms

compares the received start word against its
customer code. If and only if the start word matches
the customer code, it then compare s for two

b0 b1 b2 b3 b4 b5 b6 b7Start/Code word:

consecutive and matched code words. It then
actuates the command according to the code words

start word 1st code word 2nd code wordCode frame

table shown later.

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16. CUSTOMER CODE

The default customer code of SC2128A is internally mask programmed to b0 ~ b7 = 00110011. Code bit b3 ~
b6 may be mask programmed to any value according to customer specification under terms and conditions
agreed by SILAN. Suitable NRE is involved with customizing default customer code. Please refer to the following
table.

Mask Option Start word

Default Customer Code b0 b1 b2 b3 b4 b5 b6 b7

00110011
00110001
00110111
00110101
00111011
00111001
00111111

Mask Programmable

Customer Code

00111101
00100011
00100001
00100111
00100101
00101011
00101001
00101111
00101101

SC2128A

17. REMOTE CONTROL KEYS

Up to eight keys may be built on the remote control handset. Except SLEEP key, all keys functions the same
as their panel counterparts. SLEEP key is not available on fan panel, and is only available on remote control
handset. Pressing SLEEP key brings SC2128A to the output states as follows:

SPEED Middle wind
MODE RSLwind(maybemaskprogrammedtoSLPWindwithNRE)
TIMER 4 hours or 8 hours
SWING SO1 ON, SO2 OFF
LIGHT LIT ON

The remote transmission code words are defined in the following table.

SC2268

Corresponding

Keys

Equivalent Key

SPEED
MODE
TIMER
LIGHT
SLEEP
SW2
SW1
OFF/MEMS

Code word

b0 b1 b2 b3 b4 b5 b6 b7

00111010 I1
01011000 I2
01100010 I3
10011100 I4
10100110 I5
10110001 I6
11000101 I7
11010010 I8

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Rev: 1.0 2000.12.31

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18. VARIOUS OPTIONS

SC2128A accommodates many option possibilities. The options are summarized below:

* Package Option:

Either 16, 18, 20, 22, or 24 pin package.

* Bonding option:

ACC: Accumulated or non-accumulated timer option.
T0.5: Timer scale, 0.5/1/2/4 hour timer or 1/2/4/8 timer option.
3LT: Timer level option, either 4 levels or 3 levels.
NM: Disable memory mode.

* Metal Option:

b3 ~ b6: Replaces default customer codes
NMS: Disable middle wind start-up function
2SW: Dependent/Independent swing head control option.
RSL: SLEEP key start-up mode option – select RSL or SLP mode for SLEEP key start-up.

SC2128A

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APPLICATION CIRCUIT

SW2

IR MODULE

32.768kHz

-5V

9.1kΩ

OFF/MEMS

SPEED

MODE

SW1

LIGHT

47pf

47pf

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SC2128A

AC

SC2128A

Swing2

Low

Middle

Strong

Tb0

Swing1

Light

Tb1

220Ω

220Ω

220Ω

220Ω

Tb2

220Ω

220Ω

Sleep

Rhythm

Tb3

TIMER

-5V

SW2

REMOTE

VSS

OSCI

OSCO

VDD

OFF/MEMS/
BUZZ

SPEED

MODE

SW1

LIGHT

SO2

LO

MI

ST

LED1

LED2

LED3

COM

TIMER

SO1

LIT

Swing Head1: Controlled by SW1
Swing Head2: Controlled by SW2

200kΩ

IN4004

6.8V/1w

Supply Circuit

470µf

16V

1kΩ

2SA1015

10µf

16V

-5V

0.1µf

VAR

22Ω/2w

2.5µf/250V

FUSE

AC

AC

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Rev: 1.0 2000.12.31

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SC2268 IR TRANSMITTER APPLICATION CIRCUIT

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+3V

SC2128A

SPEED

MODE

TIMER

LIGHT

SLEEP

SW2

SW1

OFF/MEMS

1
2
3
4
5
6
7
8

I1

I2

I3

I4

I5

I6

I7

I8

SC2268

Vcc

OSC1

OSC2

Tx OUT

C4

C5

C6

Vss

16
15
14
13
12
11
10

220pf

455kHz

220pf

A1015

1kΩ

10Ω

IR LED

C1815

9

Note: SC2268 is recommended to be used with SC2128A. For this circuit, the “Start Word” is “00110011”

PACKAGE OUTLINE

DIP-16-300-2.54 UNIT:mm

2.54

0.25

6.40

7.62

19.4

3.51

0.46

1.50

5.083.30

15 degree

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0 2000.12.31

15

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