SAA5700

Features: · Acquisition and display of the 625-line PAL CCST Chinese standard for teletext, with Chinese and Latin character sets· Supports multiple DRAM sizes: 256K ×4 bits, 1M ×4 bits, 4M ×4 bits and 2 ×1M ×4 bits with an additional decoder/demultiplexer IC· Acquires and stores in background up ...

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SAA5700 Picture
SeekIC No. : 004483950 Detail

SAA5700: Features: · Acquisition and display of the 625-line PAL CCST Chinese standard for teletext, with Chinese and Latin character sets· Supports multiple DRAM sizes: 256K ×4 bits, 1M ×4 bits, 4M ×4 bits ...

floor Price/Ceiling Price

Part Number:
SAA5700
Supply Ability:
5000

Price Break

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

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Upload time: 2025/12/17

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Product Details

Description



Features:

· Acquisition and display of the 625-line PAL CCST Chinese standard for teletext, with Chinese and Latin character sets
· Supports multiple DRAM sizes: 256K ×4 bits, 1M ×4 bits, 4M ×4 bits and 2 ×1M ×4 bits with an additional decoder/demultiplexer IC
· Acquires and stores in background up to (typically) 400 pages with 1M×4 bits external DRAM
· CCST Fastext, with capability of displaying Chinese characters on Fastext prompt row
· Meshing for reduced contrast video background in subtitles and boxes
· Full line and screen colour to all edges of screen
· Supports 625-line 50/100 Hz display modes
· Scan-locked and stand-alone sync modes; supports video-locked sync modes with external PLL
· Easy control via high level I2C-bus SAFARI commands
· Sync mode switching and picture centring via I2C-bus SAFARI commands
· Supports external decryption unit for encrypted data.



Pinout

  Connection Diagram


Specifications

SYMBOL PARAMETER MIN. MAX. UNIT
VDDD1 digital supply voltage 1 -0.3 +6.5 V
VDDD2 digital supply voltage 2 -0.3 +6.5 V
VDDA analog supply voltage -0.3 +6.5 V
VDDX supply voltage X -0.3 +6.5 V
VI(max) maximum input voltage (any input) -0.3 VDD + 0.5 V
VO(max) maximum output voltage (any output) -0.3 VDD + 0.5 V
DVDDX-DDn supply voltage difference
between VDDX, VDDD1, VDDD2 and VDDA
- 0.25 V
II(d) diode input current (DC) - 20 mA
IO(d) diode output current (DC) - 20 mA
IO(max) maximum output current (any output) - 10 mA
Tstg storage temperature range -55 +125 °C
Tamb operating ambient temperature range -20 +70 °C



Description

The SAA5700 is a Chinese teletext decoder suitable for TV and multimedia applications. SAA5700 incorporates all the data slicing, acquisition and display circuitry on-chip, as well as the logic for memory management. An external DRAM is used to store the currently displayed page and also the precaptured teletext pages.

An external ROM SAA5700 is used to store the ideographic Chinese character set. There is a high level software interface with easy commands for the control of the decoder. Control is achieved via the I2C-bus.

The SAA5700 is available in a QFP64 package.




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