SN54HC257 具有三态输出的四路 2 线路至 1 线路数据选择器/多路复用器

These devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (G\) input is at a high logic level.

To ensure the high-impedance state during power up or power down, (G\) should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver

	SN54HC257
Rating	Military
Technology Family	HC

SN54HC257 特性

• Wide Operating Voltage Range of 2 V to 6 V
• High-Current Inverting Outputs Drive up to 15 LSTTL Loads
• Low Power Consumption, 80-uA Max ICC
• ’HC257 ...Typical tpd = 9 ns
• ’HC258 ...Typical tpd = 12 ns
• ±6-mA Output Drive at 5 V
• Low Input Current of 1 uA Max
• Provides Bus Interface from Multiple Sources in High-Performance Systems

SN54HC257 芯片订购指南

器件	状态	温度	价格	封装 | 引脚	封装数量 | 封装载体	丝印标记
SN54HC257J	ACTIVE	-55 to 125	15.25 | 1ku	CDIP (J) | 16	1 | TUBE
SNJ54HC257J	ACTIVE	-55 to 125	12.46 | 1ku	CDIP (J) | 16	1 | TUBE
SNJ54HC257W	ACTIVE	-55 to 125	18.57 | 1ku	CFP (W) | 16	1 | TUBE

SN54HC257 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
SN54HC257J	TBD	Call TI	N/A for Pkg Type	SN54HC257J	SN54HC257J
SNJ54HC257J	TBD	Call TI	N/A for Pkg Type	SNJ54HC257J	SNJ54HC257J
SNJ54HC257W	TBD	A42	N/A for Pkg Type	SNJ54HC257W	SNJ54HC257W

SN54HC257 应用技术支持与电子电路设计开发资源下载

1. SN54HC257 数据资料 dataSheet 下载.PDF
2. TI 德州仪器MSI 功能产品选型与价格 . xls
3. Logic Guide 2009 (PDF 4263 KB)
4. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
5. Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
6. TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
7. Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
8. CMOS Power Consumption and CPD Calculation (PDF 89 KB)
9. Designing With Logic (PDF 186 KB)
10. Live Insertion (PDF 150 KB)
11. Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
12. Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
13. HiRel Unitrode Power Management Brochure (PDF 206 KB)
14. LOGIC Pocket Data Book (PDF 6001 KB)
15. HiRel Unitrode Power Management Brochure (PDF 206 KB)
16. Logic Cross-Reference (PDF 2938 KB)