SAA5246 Ver la hoja de datos (PDF) - Philips Electronics

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SAA5246

Integrated VIP and Teletext IVT1.0

Philips Electronics 

Philips Semiconductors

Integrated VIP and Teletext (IVT1.0)

Product specification

SAA5246A

FEATURES

• Complete Teletext decoder in a 48-pin DIL or 64-pin

QFP, integrated circuit

• Single +5 V power supply

• Both video and scan related synchronization modes are

supported

• RGB interface to standard colour decoder ICs, push-pull

output drive

• Digital data slicer and display clock phase-locked loop

reduce peripheral components to a minimum

• Data capture performance similar to SAA5231 (VIP2)

• Option for up to seven national languages

• Optional storage of packet 24 in the display memory

• Separate text and video signal quality detectors,

625/525 video status and language version all readable

via I2C-bus

• Automatic ODD/EVEN output control with override

• Control of display PLL free-run and rolling header via

I2C-bus

• VCS to SCS mode for stable 525 line status display.

DESCRIPTION

The SAA5246A is a single-chip teletext decoder IC for

decoding 625 line base World System Teletext

transmissions. The teletext decoder hardware is based on

the Enhanced Computer Controlled ECCT device

(SAA5243) with some additional features.

The Video Input Processor section of the device uses

mixed analog and digital designs in the data slicer and

clock phase-locked-loop functions. As a result the number

of external components are greatly reduced and no critical

or adjustable components are required.

QUICK REFERENCE DATA

SYMBOL

VDD

IDD

Vsyn

Vvid

fXTAL

Tamb

PARAMETER

positive supply voltage

supply current

sync amplitude

video amplitude

crystal frequency

operating ambient temperature

MIN.

4.5

−

0.1

0.7

−

−20

TYP.

5.0

64

0.3

1.0

27

−

MAX.

5.5

128

0.6

1.4

−

+70

UNIT

V

mA

V

V

MHz

°C

ORDERING INFORMATION

EXTENDED TYPE

NUMBER

SAA5246AP

SAA5246AGP

PINS

48

64

Notes

1. SOT240-1; 1996 November 22.

2. SOT319-3; 1996 November 22.

PIN POSITION

DIL

QFP

PACKAGE

MATERIAL

plastic

plastic

CODE

SOT240AC3(1)

SOT319DA3(2)

January 1993

2

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