SAA5254 데이터 시트보기 (PDF) - Philips Electronics

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SAA5254

Integrated VIP and teletext decoder (IVT1.1X)

Philips Electronics 

Philips Semiconductors

Integrated VIP and teletext decoder

(IVT1.1X)

Preliminary specification

SAA5254

FEATURES

• Complete teletext decoder including page memory and

FASTEXT links in a 40-pin DIP package

• Automatic processing of extension packet 26 for widest

possible language decoding. All our standard language

options can be available, and language option is

readable via I2C-bus

• 100% hardware compatible with the SAA5244A; plug-in

replacement and extra market

• 100% hardware compatible with the SAA5244A, except

if the special OSD symbols were used with the

SAA5244A, except ROM identification number

• The device is pin-aligned with the other members of the

new Philips teletext decoder family, i.e. SAA5280 and

the SAA5249, making one hardware solution for the full

range

• Low software overhead for the control microprocessor

• Single page acquisition system

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

output drive

• Separate text and video signal quality detectors.

DESCRIPTION

The Integrated VIP and Teletext decoder (IVT1.1X) is

designed to decode 625-line based World System Teletext

transmissions. This single-chip teletext decoder hardware

is based on the SAA5244A with which it is completely

compatible.

Like the SAA5244A the device contains all the hardware

necessary to decode the teletext, but the SAA5254 also

contains extra hardware to process the extension packet

26 characters automatically, extending the markets to

which the TV chassis can be shipped and opening the

possibility of many more language options.

ORDERING INFORMATION

TYPE

NUMBER

SAA5254P

NAME

DIP40

PACKAGE

DESCRIPTION

plastic dual in-line package; 40 leads (600 mil)

VERSION

SOT129-1

QUICK REFERENCE DATA

SYMBOL

VDD

IDD

Vsync

Vvideo

fXTAL

Tamb

PARAMETER

supply voltage

supply current

sync voltage amplitude

video voltage amplitude

crystal frequency

operating ambient temperature

MIN.

4.5

−

0.1

0.7

−

−20

TYP.

5.0

90

0.3

1.0

27

−

MAX.

5.5

120

0.6

1.4

−

+70

UNIT

V

mA

V

V

MHz

°C

1996 Nov 07

2

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