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74HC393 Counter Circuits
Advanced silicon-gate CMOS technology with two 4-bit ripple carry binary counters.
- Typical Operating Frequency: 50 MHz
- Typical Propagation Delay: 13 ns (Ck to QA)
- Wide Operating Supply Voltage Range: 2–6V
- Low Input Current: <1 µA
- Low Quiescent Supply Current: 80 µA maximum (74HC Series)
Features:
- Independent ripple carry counters
- Can be cascaded for a divide-by-256 counter
- Incremented on the HIGH-to-LOW clock transition
- Clear input for count truncation
The 74HC393 contains two 4-bit ripple carry binary counters, each with an independent clear input. When clear is set HIGH, all four bits of each counter are set to a low level.
Each counter output can drive 10 low power Schottky TTL equivalent loads. The counter is functionally and pin equivalent to the 74LS393.
- Symbol Parameter: Value Unit
- VCC Supply Voltage: 0.5 to +7.0V V
- VIN DC Input Voltage: 1.5 to VCC + 1.5V V
- VOUT DC Output Voltage: 0.5 to VCC + 0.5V V
- IIK, IOK Clamp Diode Current: ±20 mA
All inputs are protected from static discharge damage by diodes to VCC and ground.
*Images are for illustration only; actual product may vary.*