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Bt857

Features: • RGB or YCrCb Inputs, Selectable on a Pixel-by-Pixel Basis• NTSC/PAL/PALM/PALN (Argentina) Composite Video Output• S-Video/RGB Outputs Supported• CCIR 601 or Square Pixel Operation• 2x Oversampling• 9-bit DACs• Master or Slave Video Timing•...

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SeekIC No. : 004302638 Detail

Bt857: Features: • RGB or YCrCb Inputs, Selectable on a Pixel-by-Pixel Basis• NTSC/PAL/PALM/PALN (Argentina) Composite Video Output• S-Video/RGB Outputs Supported• CCIR 601 or Squar...

Bt857 Data Sheet

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Part Number:
Bt857
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

• RGB or YCrCb Inputs, Selectable on a Pixel-by-Pixel Basis
• NTSC/PAL/PALM/PALN (Argentina) Composite Video Output
• S-Video/RGB Outputs Supported
• CCIR 601 or Square Pixel Operation
• 2x Oversampling
• 9-bit DACs
• Master or Slave Video Timing
• Noninterlaced Operation
• Macrovision Support (Bt857 Only)
• Closed Captioning Encoding
• Power-Down Mode
• SCART Support (RGB Outputs)
• I2C Interface
• On-Board Voltage Reference
• Internal Color Bar Generator
• 68-pin PLCC Package


Application

• Digital Set Top Box
• Direct Broadcast Satellite (DBS)
• Digital Video Disk (DVD)
• Digital VCR
• VideoCD


Pinout

Connection Diagram


Specifications

Parameter
Symbol
Min.
Typ
Max
Unit
VAA (measured to GND)
7.0
V
Voltage on Any Signal Pin (Note 1)
GND 0.5
VAA + 0.5
V
Analog Output Short Circuit Duration
to Any Power Supply or Common
ISC
Indefinite
Ambient Operating Temperature
TA
-55
+125
Storage Temperature
TS
-65
+150
Junction Temperature
TJ
+150
Vapor Phase Soldering (1 Minute)
TVSOL
220

Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a
stress rating only, and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: This device employs high-impedance CMOS devices on all signal pins. It should be handled as an ESD-ensitive device. Voltage on any signal pin that exceeds the power supply or ground voltage by more than 0.5 V can cause destructive latchup.


Description

The Bt856/7 is designed specifically for video systems requiring the generation of 525-line (NTSC/PALM) or 625-line (PALB, D, G, H, I, N, N-Argentina) composite or Y/C (S-video) signals.

The Bt856 and Bt857 are functionally identical, with the exception that it can output the Macrovision anticopy algorithm.

Horizontal sync (HSYNC*) and vertical sync (VSYNC*) may be configured as inputs (slave mode) or outputs (master mode). BLANK*Bt857 is an input and may be externally controlled.

24-bit linear or gamma-corrected RGB data or 4:2:2 YCrCb data may be input. The rise and fall times of sync, the burst envelope, and closed caption data of Bt857 are internally controlled.

Analog luminance (Y) and chrominance (C) information is available on the Y and C outputs for interfacing to S-video equipment. The composite analog video signal of Bt857 is output simultaneously onto two analog outputs. This allows one output to provide baseband composite video and another output to drive an RF modulator. Analog RGB is available to support the European SCART/PeriTV interf




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