The ’HC192, ’HC193 and ’HCT193 are asynchronously presettable BCD Decade and Binary Up/Down synchronous counters, respectively.

Features

• Synchronous Counting and Asynchronous Loading
• Two Outputs for N-Bit Cascading
• Look-Ahead Carry for High-Speed Counting
• 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