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DM74LS257BM中文资料仙童半导体数据手册PDF规格书
DM74LS257BM规格书详情
General Description
These Schottky-clamped high-performance multiplexers feature 3-STATE outputs that can interface directly with data lines of bus-organized systems. With all but one of the common outputs disabled (at a high impedance state), the low impedance of the single enabled output will drive the bus line to a HIGH or LOW logic level. To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output enable circuitry is designed such that the output disable times are shorter than the output enable times.
Features
■ 3-STATE versions LS157 and LS158 with same pinouts
■ Schottky-clamped for significant improvement in A-C performance
■ Provides bus interface from multiple sources in high-performance systems
■ Average propagation delay from data input 12 ns
■ Typical power dissipation: 50 mW
产品属性
- 型号:
DM74LS257BM
- 功能描述:
编码器、解码器、复用器和解复用器 3-STATE Data Sel/Mul
- RoHS:
否
- 制造商:
Micrel
- 产品:
Multiplexers
- 逻辑系列:
CMOS
- 线路数量(输入/输出):
2/12
- 传播延迟时间:
350 ps, 400 ps
- 电源电压-最大:
2.625 V, 3.6 V
- 电源电压-最小:
2.375 V, 3 V
- 最大工作温度:
+ 85 C
- 安装风格:
SMD/SMT
- 封装/箱体:
QFN-44
- 封装:
Tray
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
TI/德州仪器 |
23+ |
NA/ |
3270 |
原装现货,当天可交货,原型号开票 |
询价 | ||
FSC |
21+ |
SOP-16 |
3800 |
原装现货假一赔十 |
询价 | ||
FAIRCHILD |
23+ |
DIP |
9526 |
询价 | |||
NS/国半 |
95+ |
NA |
880000 |
明嘉莱只做原装正品现货 |
询价 | ||
NSC |
23+ |
原装原封 |
8888 |
专做原装正品,假一罚百! |
询价 | ||
NAT |
2015+ |
SOP |
19889 |
一级代理原装现货,特价热卖! |
询价 | ||
FSC |
03+ |
SOP-16 |
3800 |
一级代理,专注军工、汽车、医疗、工业、新能源、电力 |
询价 | ||
TI/德州仪器 |
2022 |
SOIC-16 |
80000 |
原装现货,OEM渠道,欢迎咨询 |
询价 | ||
FAIRCHILD |
DIP |
98 |
询价 | ||||
FAIR |
23+ |
589610 |
新到现货 原厂一手货源 价格秒杀代理! |
询价 |