CD74HC393ME4

高速CMOS逻辑双路4级二进制计数器 High-Speed CMOS Logic Dual 4-Stage Binary Counter

Description

The ’HC393 and ’HCT393 are 4-stage ripple-carry binary counters. All counter stages are master-slave flip-flops. The state of the stage advances one count on the negative transition of each clock pulse; a high voltage level on the MR line resets all counters to their zero state. All inputs and outputs are buffered.

Features

• 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 . . . -55oC to 125oC

• 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