BT478中文资料PDF规格书
BT478规格书详情
Product Description
The Bt471, 476, and 478 are pin-compatible
and software-compatible RAMDACs de-
signed specifically for Personal System/2®-
compatible color graphics. The Bt476 is
also available in a 28-pin DIP package that
is pin compatible with the IMS® G176.
‘The Bt471 has a 256 x 18 color lookup ta-
ble with triple 6-bit video D/A converters.
The Bt478 has a 256 x 24 color lookup table
with triple 8-bit video D/A converters. It
may be configured for either 6-bit or 8-bit
D/A converter operation. The Bt476 is simi-
lar to the Bt471 but has no overlays, no pro-
grammable setup, and no sync information
on the analog outputs.
Additional features on the Bt471 and
Bt478 include 15 overlay registers that pro-
vide, for example, overlaying cursors, grids,
‘menus, and EGA emulation. Also supported
is sync generation on all three channels, a
programmable pedestal (0 or 7.5 IRE), and
use of either an external voltage or current
reference.
‘The Bt471/476/478 generates RS-343A-
compatible video signals into a doubly-
terminated 75 Q load.
Note: Personal System/2® and PS/2® are
registered trademarks of IBM. IMS® is a
registered trademark of Inmos Limited.
Distinguishing Features
+ Personal System/2® Compatibility
+ 80,66, 50, 35 MHz Operation
Triple 6-bit or 8-bit D/A Converters
+ 256-Word Color Palette RAM
+ RS-343A-Compatible Outputs
* 15 Overlay Registers (Bt471/478)
+ Sync on All Three Channels
(Bt471/478)
+ Programmable Pedestal (Bt471/478)
+ External Voltage or Current
Reference
+ Standard MPU Interface
+ +5 V CMOS Monolithic
Construction
«+ 44-pin PLCC or 28-pin DIP Package
Applications
+ High-Resolution Color
Graphics
+ CAE/CAD/CAM
+ Image Processing
+ Instrumentation
+ Desktop Publishing
产品属性
- 型号:
BT478
- 制造商:
BROOKTREE
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
BT |
2016+ |
DIP |
3250 |
只做原装,假一罚十,公司可开17%增值税发票! |
询价 | ||
BT |
2020+ |
PLCC44 |
80000 |
只做自己库存,全新原装进口正品假一赔百,可开13%增 |
询价 | ||
BT |
23+ |
DIP |
20000 |
原厂原装正品现货 |
询价 | ||
BT |
20+/21+ |
PLCC44 |
3650 |
全新原装进口诚信经营 |
询价 | ||
BT |
24+ |
PLCC44 |
990000 |
明嘉莱只做原装正品现货 |
询价 | ||
bt |
23+ |
NA |
152 |
专做原装正品,假一罚百! |
询价 | ||
BT |
21+ROHS |
PLCC |
10000 |
原厂授权一级代理,专业海外优势订货,价格优势、品种 |
询价 | ||
BT |
PLCC |
283 |
优势代理渠道,原装正品,可全系列订货开增值税票 |
询价 | |||
BROOKTREE |
2023+ |
SMD |
20404 |
安罗世纪电子只做原装正品货 |
询价 | ||
BT |
23+ |
PLCC-28 |
17523 |
询价 |