SAA5249PSLASHE datasheet(2/44 Pages) PHILIPS

2 / 44 page

1996 Nov 07

Philips Semiconductors

Preliminary speciﬁcation

Integrated VIP and Teletext with

Background Memory Controller

SAA5249

FEATURES

• Complete teletext decoder featuring a background

memory controller in a single 48-pin DIP package.

Capable of storing of up to 512 teletext pages in an

external DRAM, giving instant access to the teletext

data

• Automatic processing of extension packet 26 for widest

possible language decoding. All our standard language

options can be available, and the language option is

readable via I2C-bus.

• 100% hardware compatible with the SAA5247 plug-in

replacement and with the possibility of extra market in

those countries with packet 26 transmissions.

Still pin-aligned to SAA5254 and SAA5244A.

• 100% software compatible with the SAA5247, and

SAA5244A, except if the special OSD symbols were

used. Also 100% software compatible to SAA5254. In all

events there is a change to the ROM ID number.

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

new Philips teletext decoder family, i.e. SAA5281 and

the SAA5254, making one hardware solution for the

whole range

• Low software overhead for the microprocessor

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

output drive.

GENERAL DESCRIPTION

The Integrated VIP and Teletext (IVT1.1BMCX) is a

teletext decoder (contained within a single chip package)

for decoding 625-line based World System Teletext

transmissions. With its built-in background memory

controller the device can store incoming teletext packets in

the external 1M4 DRAM. With this large packet store

which can be rapidly scanned, we can achieve near

instantaneous access to all the pages transmitted by the

broadcaster.

This version of the decoder also contains some extra

hardware to process extension packet 26 automatically,

extending the markets to which the TV chassis can be

shipped and offering many more language options for the

set maker.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

VDD

supply voltage

4.5

5.0

5.5

IDD

supply current

−

120

Vsyn

sync amplitude

0.1

0.3

0.6

Vvid

video amplitude

0.7

1.0

1.4

fXTAL

crystal frequency

−

MHz

Tamb

operating ambient temperature

−20

−

+70

°C

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

SAA5249P/E

DIP48

plastic dual in-line package; 48 leads (600 mil)

SOT240-1

SAA5249GP/E

QFP64

plastic quad ﬂat package; 64 leads (lead length 1.95 mm);

body 14

× 20 × 2.7 mm; high stand-off height

SOT319-1

SAA5249P/E Datasheet(PDF) 2 Page - NXP Semiconductors

SAA5249P/E Datasheet(HTML) 2 Page - NXP Semiconductors

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