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SN54LS640 八路总线收发器

These octal bus transceivers are designed for asynchronous two-way communication between data buses. The devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction control (DIR) input. The enable input (G) can be used to disable the device so the buses are effectively isolated.

The -1 versions of the SN74LS640 thru SN74LS642, SN74LS644, and SN74LS645 are identical to the standard versions except that the recommended maximum IOL is increased to 48 milliamperes. There are no -1 versions of the SN54LS640 thru SN54LS642, SN54LS644, and SN54LS645.

The SN54LS640 thru SN54LS642, SN54LS644, and SN54LS645 are characterized for operation over the full military tempearture range of –55°C to 125°C

	SN54LS640
Voltage Nodes (V)	5
Vcc range (V)	4.5 to 5.5
Input Level	TTL
Output Level	TTL
Logic	Inv
Rating	Military
Technology Family	LS

SN54LS640 特性

• SN74LS64X-1 Versions Rated at IOL of 48 mA
• Bi-directional Bus Transceivers in High-Density 20-Pin Packages
• Hysteresis at Bus Inputs Improves Noise Margins
• Choice of True or Inverting Logic
• Choice of 3-State or Open-collector Outputs

SN54LS640 芯片订购指南

器件	状态	温度	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
84161012A	ACTIVE	-55 to 125	16.78 | 1ku	LCCC (FK) | 20	1 | TUBE
8416101RA	ACTIVE	-55 to 125	7.35 | 1ku	CDIP (J) | 20	1 | TUBE
8416101SA	ACTIVE	-55 to 125	15.49 | 1ku	CFP (W) | 20	1 | TUBE
SN54LS640J	ACTIVE	-55 to 125	6.24 | 1ku	CDIP (J) | 20	1 | TUBE
SNJ54LS640FK	ACTIVE	-55 to 125	16.78 | 1ku	LCCC (FK) | 20	1 | TUBE
SNJ54LS640J	ACTIVE	-55 to 125	7.35 | 1ku	CDIP (J) | 20	1 | TUBE
SNJ54LS640W	ACTIVE	-55 to 125	15.49 | 1ku	CFP (W) | 20	1 | TUBE

SN54LS640 应用手册

标题	类型	大小
选择合适的德州仪器 (TI) 信号开关	PDF	1091
CMOS 非缓冲反向器在振荡器电路中的使用	PDF	951
选择正确的电平转换解决方案 (Rev. A)	PDF	635
How to Select Little Logic	PDF	959
Shelf-Life Evaluation of Lead-Free Component Finishes	PDF	1310
Understanding and Interpreting Standard-Logic Data Sheets	PDF	857
Texas Instruments Little Logic Application Report	PDF	359
TI IBIS File Creation, Validation, and Distribution Processes	PDF	380
16-Bit Widebus Logic Families in 56-Ball, 0.65-mm Pitch Very Thin Fine-Pitch BGA	PDF	895
Power-Up 3-State (PU3S) Circuits in TI Standard Logic Devices	PDF	209
Implications of Slow or Floating CMOS Inputs	PDF	101
Migration From 3.3-V To 2.5-V Power Supplies For Logic Devices	PDF	115
Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs	PDF	105
CMOS Power Consumption and CPD Calculation	PDF	89
LVC Characterization Information	PDF	114
Live Insertion	PDF	150
Input and Output Characteristics of Digital Integrated Circuits	PDF	1708
Understanding Advanced Bus-Interface Products Design Guide	PDF	253

SN54LS640 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
84161012A	TBD	Call TI	Call TI	84161012A	84161012A
8416101RA	TBD	Call TI	Call TI	8416101RA	8416101RA
8416101SA	TBD	Call TI	Call TI	8416101SA	8416101SA
SN54LS640J	TBD	A42	N/A for Pkg Type	SN54LS640J	SN54LS640J
SNJ54LS640FK	TBD	POST-PLATE	N/A for Pkg Type	SNJ54LS640FK	SNJ54LS640FK
SNJ54LS640J	TBD	A42	N/A for Pkg Type	SNJ54LS640J	SNJ54LS640J
SNJ54LS640W	TBD	Call TI	N/A for Pkg Type	SNJ54LS640W	SNJ54LS640W

SN54LS640 应用技术支持与电子电路设计开发资源下载

1. SN54LS640 数据资料 dataSheet 下载.PDF
2. TI 德州仪器触发器/锁存器/寄存器产品选型与价格 . xls
3. (用户指南)LOGIC Pocket Data Book
4. (用户指南)Signal Switch Data Book
5. (用户指南)LVC and LV Low-Voltage CMOS Logic Data Book
6. (选择指南)逻辑器件指南 2009 (Rev. Z)
7. (选择指南)小尺寸逻辑器件指南 (Rev. D)
8. 2008年第一季度通信基础设施方案指南 (Rev. G)
9. Communications Infrastructure Solutions Guide 1Q2010
10. Design Summary for WCSP Little Logic
11. Standard Linear & Logic for PCs, Servers & Motherboards
12. STANDARD LINEAR AND LOGIC FOR DVD/VCD PLAYERS
13. Military Low Voltage Solutions
14. Low-Voltage Logic (LVC) Designer's Guide
15. Logic Cross-Reference