Click to expand full text
Semiconductor
CD74HC393, CD74HCT393
High Speed CMOS Logic Dual 4 -Stage Binary Counter
Description
The Harris CD74HC393 and CD74HCT393 are 4-stage ripple-carry binary counters. Al counter stages are masterslave 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.
September 1997
Features
• Fully Static Operation • Buffered Inputs • Common Reset • Negative-Edge Clocking • Typical fMAX = 60 MHz at VCC = 5V, CL = 15pF, TA = 25oC • Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads • Wide Operating Temperature Range . . .