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LA72912V Datasheet(PDF) 7 Page - ON Semiconductor

Part No. LA72912V
Description  8-bit Withstand Voltage Microcontroller
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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LA72912V
No.A1409-7/12
Pin Function
Pin No.
Pin name
FM MOD mode(Outside camera)
FM DEMOD mode(Inside Monitor)
Note
1
Emphasis filter
Emphasis filter connection pin
Non connect(Hi-Z)
If you no need, this pin is open.
2
VCC5V
VCC for FM modulation.
VCC for FM demodulation.
3
FM/Video Output
FM Output
(RO=200Ω:1.8Vp-p)
Video Output
(RO=1kΩ: 2Vp-p)
Push-pull output
4
4V Regulator
FM modulate block and ASK bock
supply reference voltage.
FM demodulate block and ASK bock
supply reference voltage.
5
FM/VD input
VD Input.
(Hi: over 2V, Low: under 0.4V)
(VD DET: High)
FM Input.
(Recommend Level: 100 to 620mVp-p)
DEMOD mode: Set
3.3V by internal bias. (34k
Ω/66kΩ)
6
MOD/DEMOD Control
Set over 2V DC voltage.
Set under 0.4V DC voltage.
Outside camera /
Inside monitor setting.
7
TC1(MOD)/
FMAGC monitor
Out control
Set capacitor for TC1
FMAGC monitor out control
GND: Monitor ON / VCC: Monitor OFF
Can do second inside monitor
addition
8
TC2(DEMOD)/
FMAGC monitor
Output
Set capacitor for TC2
FMAGC monitor output
Can do second inside monitor
addition
9
ASK-VCC5V
VCC for ASK
10
ASK CAR IN
ASK carrier Input.
(Recommend below 3Vp-p)
2.1V by internal bias. (50k
Ω)
11
ASK DATA IN
ASK Data Input.
(Hi: more than 2V, Lo: below 0.4V)
12
ASK TX Output
ASK modulated signal Output
Push-pull output
13
ASK RX Output
ASK Demodulated Output
Open collector output
ASK carrier detect = Lo
14
ASK DET filter
ASK Detector filter
15
ASK AGC filter
/AGC OFF
AGC filter for ASK. (When AGC
operate voltage is 0V to 3V, AGC stop
when you add over 4.5V.)
16
ASK RX input
ASK Demodulate Input
3.3V by internal bias. (34k
Ω/66kΩ)
17
Standby control
FM blocks standby control. (FM block
operate: over 2V, FM block standby:
under 0.4V )
18
DOC-OUT
/2nd-Call input
2ND-Call input, 2ND-Call: Low (High:
over 2V, Low: under 0.4V)
DOC output
(When DO-DET, output is Low)
DEMOD mode:
Open collector output.
19
B-GND
Circuit GND
20
FM AGC filter
Emphasis monitor output
FM AGC control filter (AGC-ON:0
to
3V DC, AGC-OFF:4.5V
to 5V by
external DC voltage.)
MOD mode: Don’t connect
capacitor.
21
De-emphasis filter
Non connect(Hi-Z)
De-emphasis filter connection pin.
If you don’t need, this pin is open.
22
A-GND
Circuit GND
23
De-emphasis output
/V-2V select
DFF for V-diff control
(ON: over 2V, OFF: under 0.4V)
DE-emphasis output
MOD mode;
VD diff. Count select
0V : VD through
2V : VD 1/2 diff
24
Video input
Video signal input.
(from outside CCD camera: 1Vp-p).
Video signal input.
(from de-emphasis block: 0.5Vp-p).
MOD mode: Maximum video input
level is 1.5Vp-p.




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