SAA5244A Datasheet, PDF (2/32 Pages) NXP Semiconductors – Integrated VIP and teletext decoder IVT1.1

Philips Semiconductors
Integrated VIP and teletext decoder
(IVT1.1)
Product specification
SAA5244A
FEATURES
• Complete teletext decoder including page memory in a
single 40-pin DIL package
• Single +5 V power supply
• Digital data slicer and display clock phase-locked loop
reduces peripheral components to a minimum
• Both video and scan related synchronization modes are
supported
• On board single page memory including extension
packets for FASTEXT
• Single page acquisition system
• RGB interface to standard colour decoder ICs, push-pull
output drive
• Data capture performance similar to SAA5231 (VIP2)
• Simple software control via I²C-bus
• Option for five national languages
• 32 supplementary characters for on-screen displays
• Optional storage of packet 24 in the display memory
• Page links in packets 27 and 8/30 are Hamming
decoded
• 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 manual
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 Integrated VIP and Teletext (IVT1.1) is a teletext
decoder (contained within a single-chip package) for
decoding 625-line based World System Teletext
transmissions. The teletext decoder hardware is based on
a reduced function version of the device SAA5246
(IVT1.0).
The Video Input Processor (VIP) section of the device
uses mixed analog and digital designs for the data slicer
and the display clock phase-locked loop functions. As a
result the number of external components is greatly
reduced and no critical or adjustable components are
required. A single page static RAM is incorporated in the
device thereby giving a genuine single-chip teletext
decoder device.
ORDERING INFORMATION
EXTENDED TYPE
NUMBER
SAA5244AP
SAA5244AGP
PINS
40
44
Notes
1. SOT129-1; 1996 December 16.
2. SOT205-1; 1996 December 16.
PACKAGE
PIN POSITION
MATERIAL
DIL
QFP
plastic
plastic
CODE
SOT129⁽¹⁾
SOT205A⁽²⁾
March 1992
2