CD74HC640 具有三态输出的高速 CMOS 逻辑八路反向总线收发器
CD74HC640 描述
The ’HC640 and ’HCT640 silicon-gate CMOS three-state bidirectional inverting and non-inverting buffers are intended for two-way asynchronous communication between data buses. They have high drive current outputs which enable high-speed operation when driving large bus capacitances. These circuits possess the low power dissipation of CMOS circuits, and have speeds comparable to low power Schottky TTL circuits. They can drive 15 LSTTL loads. The ’HC640 and ’HCT640 are inverting buffers.
The direction of data flow (A to B, B to A) is controlled by the DIR input.
Outputs are enabled by a low on the Output Enable input (OE\); a high OE\ puts these devices in the high impedance mode
| CD74HC640 | |
| Voltage Nodes(V) | 5 |
| Rating | Catalog |
| Technology Family | ACT |
CD74HC640 特性
- Buffered Inputs
- Three-State Outputs
- Applications in Multiple-Data-Bus Architecture
- Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
- Wide Operating Temperature Range . . . -55°C to 125°C
- Balanced Propagation Delay and Transition Times
- Significant Power Reduction Compared to LSTTL Logic ICs
- HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
- HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
CD74HC640 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 |
| CD74HC640M | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| CD74HC640ME4 | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| CD74HC640MG4 | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R |
CD74HC640 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 |
| CD74HC640M | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74HC640M | CD74HC640M |
| CD74HC640ME4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74HC640ME4 | CD74HC640ME4 |
| CD74HC640MG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74HC640MG4 | CD74HC640MG4 |
CD74HC640 应用技术支持与电子电路设计开发资源下载
- CD74HC640 数据资料 dataSheet 下载.PDF
- TI 德州仪器缓冲器、驱动器/收发器产品选型与价格 . xls
- CMOS 非缓冲反向器在振荡器电路中的使用 (PDF 951 KB)
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- 逻辑产品选择指南 2006/2007 （修订版 Z）(4462KB)
- 标准线性和逻辑产品 5 分钟指南 (786KB)
- 了解和解释标准逻辑数据表
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)
