Philips SAA5231 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

SAA5231

Teletext video processor

Product specification
File under Integrated Circuits, IC02

November 1986

Philips Semiconductors Product specification

Teletext video processor SAA5231

GENERAL DESCRIPTION

The SAA5231 is a bipolar integrated circuit intended as a successor to the SAA5030. It extracts Teletext Data from the
video signal, regenerates Teletext Clock and synchronizes the text display to the television syncs. The integrated circuit
is intended to work in conjunction with CCT (Computer Controlled Teletext), EUROM or other compatible devices.

Features

• Adaptive data slicer

• Data clock regenerator

• Adaptive sync separator, horizontal phase detector and 6 MHz VCO forming display phase locked loop (PLL)

QUICK REFERENCE DATA

Supply voltage (pin 16) V
Supply current (pin 16) I
Video input amplitude (pin 27) (peak-to-peak value)

pin 2 LOW V

pin 2 HIGH V
Storage temperature range T
Operating ambient temperature range T

PACKAGE OUTLINE

28-lead dual in-line; plastic (SOT117); SOT117-1; 1996 November 14

CC

CC

27-13(p-p)
27-13(p-p)
stg
amb

typ. 12 V
typ. 70 mA

typ. 1 V
typ. 2,5 V

-20 to + 125 °C
0to+70 °C

November 1986 2

Philips Semiconductors Product specification

Teletext video processor SAA5231

, full pagewidth

CC

V

(+12 V)

(VCR)

mode input

video recorder

(PL/CBB)

sandcastle

input pulse

10

(F6)

output

6 MHz clock

17

CONTR.

VOLTAGE

OSCILLATOR

PHASE

DETECTOR

HORIZONTAL

(TTD)

output

teletext data

15

LATCHES

DATA

SLICER

ADAPTIVE

output

teletext clock

14

PHASE

CLOCK

DETECTOR

(TTC)

12

PHASE

SHIFTER

DATA

SENSE

EXTERNAL

MGH184

1311978651432

÷ 2

OSCILLATOR

external

data input

PULSE

GENERATOR

DUAL

BUFFER

POLARITY

SYNC

ADAPTIVE

SEPARATOR

27

input

video

composite

26

25 24 23 22 1921 20 18 16

(VCS)

sync output

video composite

text

composite

28

or

(TCS)

sync input

scan

composite

SAA5231

SENSE

'NO INPUT'

(SCS)

sync input

November 1986 3

SENSE

'NO LOAD'

HF LOSS

COMPENSATOR

GAIN

SWITCH

Fig.1 Block diagram.

sync outputvideo input

level select

Philips Semiconductors Product specification

Teletext video processor SAA5231

PINNING

handbook, full pagewidth

sync output

video input level select

HF filter

store HF
store amplitude
store zero level

external data input

data timing

store phase

VCR

crystal

clock filter

ground

clock output (TTC)

1
2
3
4
5
6
7
8

9
10
11
12
13

SAA5231

MGH185

text composite sync input (TCS)

scan composite sync input (SCS)

28

composite video input

27

black level

26

video composite sync output (VCS)

25

pulse timing capacitor

24
23

pulse timing resistor
sandcastle input pulse (PL/CBB)

22
21

filter 1
oscillator input

20

filter 2

19

oscillator output

18

6 MHz output (F6)

17

supply V

16
1514

data output (TTD)

or

CC

Fig.2 Pinning diagram.

RATINGS

Limiting values in accordance with the Absolute Maximum System (IEC 134)

Supply voltage (pin 16) V
Storage temperature range T
Operating ambient temperature T

November 1986 4

CC
stg
amb

max. 13,2 V

− 20 to + 125 °C
0 to + 70 °C