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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...

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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 compo...

SAA5244A Data Sheet

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Part Number:
SAA5244A
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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


Pinout

Connection Diagram


Specifications

SYMBOL PARAMETER MIN. MAX. UNIT
VDD digital supply voltage -0.3 +6.5 V
VI input voltage (any input) -0.3 VDD + 0.5 V
VO output voltage (any output) -0.3 VDD + 0.5 V
IO output current (each output) - ±10 mA
IIOK DC input or output diode current - ±20 mA
Tamb operating ambient temperature range -20 70 °C
Tstg operating ambient temperature -55 125 °C
Vesd electrostatic handling
human body model (note 1)		 -2000 2000 V

Note
1. The human body model ESD simulation is equivalent to discharging a 100 pF capacitor through a 1.5 kW resistor; this produces a single discharge transient. Reference Philips Semiconductors test method UZW-B0/FQ-A302 (compatible with MIL-STD method 3015.7).




Description

The Integrated VIP and Teletext (IVT1.1) SAA5244A 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 SAA5244A 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 SAA5244A 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.




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