74393 - Harris Corporation

74393 High Speed CMOS Logic Dual 4 -Stage Binary Counter

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 .

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 . . . -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 - Dir.