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BT458 - (BT457 / BT458) Monolithic CMOS 256 Color Palette RAMDAC

Download the BT458 datasheet PDF. This datasheet also covers the BT457 variant, as both devices belong to the same (bt457 / bt458) monolithic cmos 256 color palette ramdac family and are provided as variant models within a single manufacturer datasheet.

General Description

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1-1 Pin Descriptions

Key Features

  • w w w The Bt457 and Bt458 are pin- and software-compatible RAMDACs designed specifically for high-performance, high-resolution color graphics. The architecture enables a display of 1280 x 1024 bit-mapped color graphics (up to 8 bits per pixel plus up to 2 bits of overlay information). This minimizes the use of costly ECL interfacing, because most of the high-speed (pixel clock) logic is contained on-chip. The multiple pixel ports and internal multiplexing enable TTL-compatible interface (up to 3.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (BT457_ConexantSystems.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number BT458
Manufacturer Conexant Systems
File Size 639.05 KB
Description (BT457 / BT458) Monolithic CMOS 256 Color Palette RAMDAC
Datasheet download datasheet BT458 Datasheet

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Other Datasheets by Conexant Systems

Part Number Description
BT457 (BT457 / BT458) Monolithic CMOS 256 Color Palette RAMDAC
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
m o .c U 4 t e Bt457/Bt458 e h S MHz/165 MHz Monolithic CMOS 256 Color Palette 125 MHz/135 a RAMDAC at .D Distinguishing Features w w w The Bt457 and Bt458 are pin- and software-compatible RAMDACs designed specifically for high-performance, high-resolution color graphics. The architecture enables a display of 1280 x 1024 bit-mapped color graphics (up to 8 bits per pixel plus up to 2 bits of overlay information). This minimizes the use of costly ECL interfacing, because most of the high-speed (pixel clock) logic is contained on-chip. The multiple pixel ports and internal multiplexing enable TTL-compatible interface (up to 32 MHz) to the frame buffer, while maintaining the 165 MHz video data rates required for sophisticated color graphics.