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CD74HCT4020技术文档下载：
CD74HCT4020 - 产品图解：
CD74HCT4020 - 高速 CMOS 逻辑 14 级二进制计数器
CD74HCT4020是TI公司的一款计数器/算术/奇偶校验功能产品，CD74HCT4020是高速 CMOS 逻辑 14 级二进制计数器，本页介绍了CD74HCT4020的产品说明、应用、特性等，并给出了与CD74HCT4020相关的TI元器件型号供参考。
CD74HCT4020 - 高速 CMOS 逻辑 14 级二进制计数器 - 计数器/算术/奇偶校验功能 - 特殊逻辑 - TI公司（Texas Instruments，德州仪器）
产品描述
The ’HC4020 and ’HCT4020 are 14-stage ripple-carry binary counters. All counter stages are master-slave flip-flops. The state of the stage advances one count on the negative clock transition of each input pulse; a high voltage level on the MR line resets all counters to their zero state. All inputs and outputs are buffered.
产品特性
- Fully Static Operation
- Buffered Inputs
- Common Reset
- Negative Edge Clocking
- 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
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