Datasheet Details
| Part number | Bt457 |
|---|---|
| Manufacturer | Brooktree |
| File Size | 639.59 KB |
| Description | Monolithic CMOS 256-Color Palette RAMDAC |
| Datasheet | Bt457 Bt451 Datasheet (PDF) |
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Overview: Bt451 Bt457 125 MHz/135 MHz/165 MHz Monolithic CMOS 256 Color Palette RAMDAC Bt458 The Bt457 and Bt458 are pin and software-patible 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-patible interface (up to 32 MHz) to the frame buffer, while maintaining the 165 MHz video data rates required for sophisticated color graphics. The Bt457 is a single-channel version of the Bt458 and has a 256 x 8 color lookup table with a single 8-bit video D/A converter. It includes a PLL output to enable subpixel synchronization of multiple Bt457s.
This datasheet includes multiple variants, all published together in a single manufacturer document.
| Part number | Bt457 |
|---|---|
| Manufacturer | Brooktree |
| File Size | 639.59 KB |
| Description | Monolithic CMOS 256-Color Palette RAMDAC |
| Datasheet | Bt457 Bt451 Datasheet (PDF) |
|
|
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| Brand Logo | Part Number | Description | Manufacturer |
|---|---|---|---|
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BT457 | (BT457 / BT458) Monolithic CMOS 256 Color Palette RAMDAC | Conexant Systems |
| Part Number | Description |
|---|---|
| Bt451 | Monolithic CMOS 256-Color Palette RAMDAC |
| BT453 | Monolithic CMOS |
| Bt458 | Monolithic CMOS 256-Color Palette RAMDAC |
| BT459 | Monolithic CMOS 256 x 24 Color Palette RAMDAC |
| BT438 | Clock Generator Chip |
| BT440 | 275MHz PLL Clock Generator |
| BT467 | Monolithic CMOS 256-Color Palette RAMDAC |
| BT481 | 110 Mhz / 256 Word Color Palette / 24 Bit True Color Power Down RAMDAC |
| BT481A | 110 Mhz / 256 Word Color Palette / 24 Bit True Color Power Down RAMDAC |
| BT482 | 110 Mhz / 256 Word Color Palette / 24 Bit True Color Power Down RAMDAC |