SC9149AHN SILAN [Silan Microelectronics Joint-stock], SC9149AHN Datasheet - Page 11

• Manufacturer Part Number: SC9149AHN
• Description: INFRARED REMOTE CONTROL RECEIVER
• Manufacturer: SILAN [Silan Microelectronics Joint-stock]

open the circuit.
status.
diagram when Code bit C2=1 and C3=0.
2. COMBINATION OF SC9148A/SC9150A CODE BITS
Code Bit C3 of transmitter SC9148A at “1”. To keep Code Bit C3 at “1”, connect a diode to CODE terminal from T3
terminal.
4. Note for Input Signal
10kΩ in series to Rx Input terminal in order to prevent latch-up. expect SC9149AHN. Other circuit should be
connect as following: output signal of infrared receiver should be inversed, and then input RXIN port.
The combination of code bits of SC9148A and SC9150A is shown in the following table.
On SC9150A, C3 code has been pulled up in IC and always kept at “1” status. Therefore , it is necessary to keep
If input voltage above V
Therefore, on transmitter SC9148A it is necessary to keep C1 code bit at “1” . Example 1 is the external circuit
To make code bit to “1” on SC9148A, connect diode to CODE terminal from T1~T3 terminal. To set Code bit “0” ,
SC9149A has C2 and C3 code terminal. Code bit of C1 has been pulled up in IC and C1 is always kept at “1”
Silan
Semiconductors
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
DD
VDD
+0.3V may possibly be applied to Rx Input Terminal(2 Pin), connect resistor of about
VDD
C1
16
1
0
1
CODE
13
15
OSC
SC9148A
Example 2 (C1=1 and C2=0)
(C3)
12
T3
C2
0
1
1
Code1
(C1)
22
SC9148A
SC9150A
(C2)
11
T2
Code2
(C1)
(C2)
10
21
T1
C3
11
1
1
1
SC9149A/SC9150A
SP1~SP10
K1~K10
C2
1
0
1
SC9150A
C1=C3=1,C2=0
C1=1,C2=0
Code:
Code:
C3
0
1
1
Rev: 1.2
2003.01.21