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TMS3637P Datasheet(PDF) 38 Page - Texas Instruments

Part # TMS3637P
Description  Remote Control Transmitter/Receiver
PDF  53 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS3637P Datasheet(HTML) 38 Page - Texas Instruments

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6–6
Table 6–3. Infrared Transmitter Component Functions (Normal Transmission Mode)
DEVICE
FUNCTION
U1
TMS3637 configured as a normal continuous transmitter
R1
Resistor on OSCR that, in conjunction with C1, determines the internal oscillator frequency of U1.
R2
Current-limiting resistor for LED
R3
Current-limiting base-drive resistor for Q1
R4
Pullup resistor for OUT on U1 and bias for Q1
R5
Current-limiting collector resistor for Q1
R6
Pullup resistor for TIME
C1
Capacitor on OSCC that, in conjunction with R1, determines the internal oscillator frequency of U1.
C2
Power-supply bypass capacitor
D1
LED for visual indication of transmitted code
D2
Infrared LED used to transmit code
Q1
The pnp transistor that drives infrared LEDs
S1
S1 is closed for transmission.
R1
100 k
Ω
OSCR
OSCC
TIME
GND
C1
470 pF
VCC
IN
CEX
OUT
U1 (transmitter)
R3
220
Ω
R2
220
Ω
D2
C2
100
µF
R5
3.9
Ω
D1
R4
10 k
Ω
VCC
+
87
6
5
1
234
R6
10 k
Ω
R6
10 k
Ω
Q1
Figure 6–4. Infrared Transmitter



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