Technical datasheet for the JRC LA76832I2C chip, detailing its functions in TV signal processing, internal structure, application circuits, and troubleshooting.
This document describes the JRC LA76832I2C chip, a single-chip processor designed for color television signal processing. It handles image and audio frequency signals, including PLL demodulation, AGC, and automatic gain control. The chip supports PAL/M/SECAM systems and features internal line delay circuits to reduce external component requirements. This manual is written in Chinese.
| Supply Voltage (Pin 1) | 2.4V DC, 24 Ohms |
|---|---|
| IF AGC Input Voltage | 2.5V DC, 0 Ohms |
| RF AGC Output Voltage | 1.74V DC, 10 Ohms |
| IF Input Impedance | 10 Ohms DC, 6 Ohms AC |
| Power Supply Current (Pin 2) | 50mA DC |
| RGB Supply Voltage (Pin 13) | 8.0V DC, 8 Ohms |
| Clock Output Impedance | 95 Ohms AC, 0.95V DC |
| CCD Delay Supply Voltage | 4.4V DC, 0.3 Ohms |
The chip requires a 9V power supply, with internal regulation to 8.0V.
The ABL pin voltage should be around 2V, adjustable between 2.0V and 5.0V via PC control.