CD74HC245 具有三态输出的高速 CMOS 逻辑同向八路总线收发器
CD74HC245 描述
The CD54HC245, CD54HCT245, and CD74HC245, CD74HCT245 are high-speed octal three-state bidirectional transceivers intended for two-way asynchronous communication between data buses. They have high drive current outputs which enable high-speed operation while driving large bus capacitances. They provide the low power consumption of standard CMOS circuits with speeds and drive capabilities comparable to that of LSTTL circuits.
The CD54HC245, CD54HCT245, CD74HC245 and CD74HCT245 allow data transmission of the B bus or from the B bus to the A bus. The logic level at the direction input (DIR) determines the direction. The output enable input (OE\), when high, puts the I/O ports in the high-impedance state.
The HC/HCT245 is similar in operation to the HC/HCT640 and the HC/HCT643
| CD74HC245 | |
| Voltage Nodes(V) | 5 |
| Rating | Catalog |
| Technology Family | ACT |
CD74HC245 特性
- Buffered Inputs
- Three-State Outputs
- Bus Line Driving Capability
- Typical Propagation Delay (A to B, B to A) 9ns at VCC = 5V, CL = 15pF, TA = 25°C
- 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
CD74HC245 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 |
| CD74HC245M96 | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| CD74HC245M96E4 | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| CD74HC245M96G4 | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R |
CD74HC245 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 |
| CD74HC245M96 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74HC245M96 | CD74HC245M96 |
| CD74HC245M96E4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74HC245M96E4 | CD74HC245M96E4 |
| CD74HC245M96G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74HC245M96G4 | CD74HC245M96G4 |
CD74HC245 应用技术支持与电子电路设计开发资源下载
- CD74HC245 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)
- Semiconductor Packing Methodology (PDF 3005 KB)
- 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)
