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參數資料
型號: TMS3637P
廠商: TEXAS INSTRUMENTS INC
元件分類: 搖控器
英文描述: INFRARED, TRANSMITTER/RECEIVER IC, PDIP8
封裝: PLASTIC, DIP-8
文件頁數: 32/54頁
文件大小: 384K
代理商: TMS3637P
6–7
Table 6–4. Infrared Receiver Component Functions (Normal Transmission Mode)
DEVICE
FUNCTION
U1
TMS3637 configured as a logic normal (1-code) Q-state inverting receiver
R1
Current-limiting resistor for IR transistor Q1
R2
Base-bias resistor for Q1
R3
Collector current-limiting resistor for Q2
R4
Collector current-limiting resistor for Q3
R5
Emitter current-limiter for Q3
R6
Resistor on TIME that, in conjunction with C3, determines OUT pulse duration on U1.
R7
Resistor on OSCR that, in conjunction with C4, determines internal oscillator frequency of U1.
R8
Current-limiting resistor for LED indicator
C1
AC-coupling capacitor that passes fluctuating voltage from phototransistor Q1
C2
Power-supply bypass capacitor
C3
Capacitor on TIME that, in conjunction with R6, determines OUT pulse duration on U1.
C4
Capacitor on OSCC that, in conjunction with R7, determines the internal oscillator frequency of U1.
C5
Capacitor that determines the gain of the internal analog receive amplifier on U1.
D1
LED indicator that toggles on/off when valid code is received
R7
100 k
OSCR
OSCC
TIME
GND
C4
47 pF
VCC
IN
CEX
OUT
U2 (receiver)
R6
1 M
C3
470 nF
R8
330
D1
VCC
OUT
R4
10 k
R3
100 k
C2
47
F
+
R1
330
R2
100 k
C1
0.1
F
R5
2.7 k
Q3
2N2222
Q2
2N2222
Q1
NPN IR
Phototransistor
87
6
5
12
3
4
Figure 6–5. Infrared Receiver
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