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CD74HC21技术文档下载：
CD74HC21 - 产品图解：
CD74HC21 - 高速 CMOS 逻辑双路 4 输入与门
CD74HC21是TI公司的一款与门产品，CD74HC21是高速 CMOS 逻辑双路 4 输入与门，本页介绍了CD74HC21的产品说明、应用、特性等，并给出了与CD74HC21相关的TI元器件型号供参考。
CD74HC21 - 高速 CMOS 逻辑双路 4 输入与门 - 与门 - 门 - TI公司（Texas Instruments，德州仪器）
产品描述
The ’HC21 and CD74HCT21 logic gates utilize silicon gate CMOS technology to achieve operating speeds similar to LSTTL gates with the low power consumption of standard CMOS integrated circuits. All devices have the ability to drive 10 LSTTL loads. The HCT logic family is functionally pin compatible with the standard LS logic family.
产品特性
- Buffered Inputs
- Typical Propagation Delay: 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
Data sheet acquired from Harris Semiconductor
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