LA76810 pin function and test data

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LA76810 is a super-single P/N multi-standard system produced by Japan Sanyo Company on the basis of LA7688, further increasing internal integration, reducing peripheral components, simplifying production debugging, increasing automation adjustment, and improving the inadequacies of LA7688. Color TV signal processing for large scale integrated circuits. The internal block diagram of LA76810 is shown in Figure 2. The integrated circuit includes an image intermediate frequency amplification and demodulation circuit, a second audio intermediate frequency amplification and demodulation circuit, a PAL/NTSC chrominance decoding circuit and a luminance signal processing circuit, a synchronous separation and a line and field deflection excitation signal generating circuit, I2C interface circuit. Table 2 lists the LA76810 pin functions and test data.

Pin

Positive measurement / Ω

54

Features

Working voltage / V

Ground resistance (R × 1KΩ)

Backtest / Ω

1

Audio output

2.0

3.9K

3.8K

2

FM output

1.9

7.0K

8.5K

3

Image IF AGC filtering

2.1

7.4K

9.0K

4

RF AGC output

3.5

6.8K

16K

5

Image IF input

2.6

7.2K

8.2K

6

Image IF input

2.6

7.2K

8.2K

7

Ground

0

0

0

8

Intermediate frequency power supply

4.6

0.5K

0.5K

9

Filter

1.5

7.4K

9.5K

10

AFT output

2.2

7.0K

8.8K

11

Bus data line

4.4

4.3K

5.5K

12

Bus clock line

4.3

4.3K

5.5K

13

Automatic brightness limit

3.9

5.6K

4.5K

14

R input

0.5

7.2K

8.6K

15

G input

0.5

7.2K

8.6K

16

B input

0.5

7.2K

8.6K

17

Blanking input

0

3.4K

3.4K

18

RGB power supply

7.2

0.7K

0.7K

19

R output

2.0

5.5K

7.8K

20

G output

1.9

5.6K

7.8K

twenty one

B output

2.0

5.5K

7.8K

twenty two

Synchronous output

0.2

5.8K

8.0K

twenty three

Field output

2.2

2.0K

2.0K

twenty four

Field sawtooth filtering

1.2

7.4K

8.6K

25

Line power

4.9

0.7K

0.7K

26

Row AFC filtering

2.4

7.4K

9.1K

27

Line output

0.5

2.2K

2.1K

28

Reverse pulse input

0.8

7.2K

8.2K

29

VCO benchmark

1.4

4.9K

4.8K

30

4MHz clock output

0.1

5.4K

9.1K

31

power supply

4.7

0.5K

0.5K

32

Filter

7.5

4.8K

∞K

33

Ground

0

0

0

34

SECAM BY input

1.6

7.5K

8.2K

35

SECAM RY input

1.6

7.5K

8.4K

36

C-AFC filtering

3.5

7.8K

8.8K

37

FSC output

2.1

7.0K

8.2K

38

4.43MHz crystal oscillator

2.5

7.6K

8.8K

39

Chroma APC filtering

2.7

7.5K

8.4K

40

Video output

2.2

7.5K

9.0K

41

Ground

0

0

0

42

External video input

2.3

7.6K

9.0K

43

V/C/D power supply

4.7

0.5K

0.5K

44

Video input

2.4

7.5K

9.1K

45

Black extension filter

1.6

7.5K

8.2K

46

Video output

1.9

1.8K

1.7K

47

Image IF APC filtering

0.9

7.5K

9.0K

48

Video detection

3.9

1.1K

1.0K

49

Video detection

3.9

1.1K

1.1K

50

VDO filtering

2.2

7.2K

9.0K

51

External audio input

1.6

7.5K

8.8K

52

Acoustic IF output

1.6

7.2K

9.0K

53

Acoustic IF APC filtering

1.9

7.4K

9.0K

Audio IF input

2.8

7.6K

9.1K

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