SAA5246 Просмотр технического описания (PDF) - Philips Electronics

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производитель

SAA5246

Integrated VIP and Teletext IVT1.0

Philips Electronics 

Philips Semiconductors

Integrated VIP and Teletext (IVT1.0)

Product specification

SAA5246A

PINNING

SYMBOL

OSCOUT

OSCIN

OSCGND

VSS

BLACK

CVBS

IREF

VDD

POL

STTV/LFB

VCR/FFB

R

G

B

RGBREF

BLAN

COR

ODD/EVEN

Y

SCL

SDA

D0-D5

n.c.

D6-D7

PIN

SOT240 SOT319

DESCRIPTION

2

27

27 MHz crystal oscillator output

3

28

27 MHz crystal oscillator input

4

29

0 V crystal oscillator ground

5, 14, 25 26, 30, 31, 0 V ground

43, 58

7

35

video black level storage pin, connected to ground via a 100 nF capacitor

8

36

composite video input pin. A positive-going 1 V (peak-to-peak) input is

required, connected via a 100 nF capacitor

9

37

reference current input pin, connected to ground via a 27 kΩ resistor

1, 6, 10 25, 32, 38 +5 V positive supply

11

39

STTV/LFB/FFB polarity selection pin

12

40

sync to TV output pin/line flyback input pin. Function controlled by an

internal register bit (scan sync mode)

13

42

PLL time constant switch/field input pin. Function controlled by an internal

register bit (scan sync mode)

15

44

dot rate character output of the RED colour information

16

45

dot rate character output of the GREEN colour information

17

47

dot rate character output of the BLUE colour information

18

48

input DC voltage to define the output high level on the RGB pins

19

52

dot rate fast blanking output

20

53

programmable output to provide contrast reduction of the TV picture for

mixed text and picture displays or when viewing newsflash/subtitle pages.

Open-drain output

21

54

a 25 Hz output synchronized to the input CVBS field sync pulses to make a

non-interlaced display by adjustment of the vertical deflection currents.

22

55

dot rate character output of teletext foreground colour information.

Open-drain output

23

56

serial clock input for I2C-bus. It can still be driven HIGH during power-down

of the device

24

57

serial data port for the I2C-bus. Open drain output. It can still be driven

HIGH during power-down of the device

26-31

60-64, 3 data ports for the page SRAM

−

1, 2, 10, 11, not connected

15, 18, 33,

34, 41, 46,

49 - 51, 59

32, 33

4, 5

data ports for the page SRAM

January 1993

4

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