Datasheet4U Logo Datasheet4U.com

Bt458 - Monolithic CMOS 256-Color Palette RAMDAC

Download the Bt458 datasheet PDF. This datasheet also covers the Bt451 variant, as both devices belong to the same monolithic cmos 256-color palette ramdac family and are provided as variant models within a single manufacturer datasheet.

Description

The Bt4978 is available in both 84-pin Plastic Leaded Chip Carrier (PLCC) and Ceramic PGA packages, as illustrated in Figure 1 and 2.

Pin descriptions are provided in Table 1.

Pin labels for the PGA package are given in Table 2.

Features

  • include programmable blink rates, bit plane masking and blinking, color overlay capability, and a dual-port color palette RAM. Functional Block Diagram CLOCK.
  • CLOCK VAA GND.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (Bt451-Brooktree.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number Bt458
Manufacturer Brooktree
File Size 639.59 KB
Description Monolithic CMOS 256-Color Palette RAMDAC
Datasheet download datasheet Bt458 Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
BT458 (BT457 / BT458) Monolithic CMOS 256 Color Palette RAMDAC Conexant Systems
BT45228 LCD BATRON
BT45258 LCD BATRON
BT457 (BT457 / BT458) Monolithic CMOS 256 Color Palette RAMDAC Conexant Systems
BT401 DC/DC Converters ETC

Other Datasheets by Brooktree

Part Number Description
Bt451 Monolithic CMOS 256-Color Palette RAMDAC
BT453 Monolithic CMOS
Bt457 Monolithic CMOS 256-Color Palette RAMDAC
BT459 Monolithic CMOS 256 x 24 Color Palette RAMDAC
BT438 Clock Generator Chip

Full PDF Text Transcription

Click to expand full text
Bt451 Bt457 125 MHz/135 MHz/165 MHz Monolithic CMOS 256 Color Palette RAMDAC Bt458 The Bt457 and Bt458 are pin and software-compatible RAMDACs designed specifically for high-performance, high-resolution color graphics. The architecture enables the display of 1280 x 1024 bit-mapped color graphics (up to 8 bits per pixel plus up to 2 bits of overlay information), minimizing the use of costly ECL interfacing, as 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.
Published: |