Bt451 - Monolithic CMOS 256-Color Palette RAMDAC

General 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.

Key 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.

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Bt451 monolithic cmos 256-color palette ramdac by Brooktree - Datasheet Preview

Datasheet Details

Part number	Bt451
Manufacturer	Brooktree
File Size	639.59 KB
Description	Monolithic CMOS 256-Color Palette RAMDAC
Datasheet	Bt451 Datasheet

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Other Datasheets by Brooktree

Part Number	Description
BT453	Monolithic CMOS
Bt457	Monolithic CMOS 256-Color Palette RAMDAC
Bt458	Monolithic CMOS 256-Color Palette RAMDAC
BT459	Monolithic CMOS 256 x 24 Color Palette RAMDAC
BT438	Clock Generator Chip

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.

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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.