Binary Up/Dn Counter 74193

The Binary Up/Dn Counter 74193 is a 74-series synchronous 4-bit binary up/down counter. It counts from 0 to 15 and back, with separate clock inputs for counting up and counting down, a parallel load to preset any starting value and a clear input to reset to zero. Carry and borrow outputs let you cascade several chips into 8-bit or larger counters.

Binary Up/Dn Counter 74193 Specifications

• Function: synchronous 4-bit binary up/down counter (0–15)
• Clock inputs: separate UP (pin 5) and DOWN (pin 4)
• Preset: data inputs A–D, loaded when LOAD (pin 11) is low
• Clear: CLR (pin 14), active high, resets the count to 0
• Outputs: QA–QD plus carry (pin 12) and borrow (pin 13) for cascading
• Package and supply: 16-pin DIP, 5 V, VCC on pin 16 and GND on pin 8

Binary Up/Dn Counter 74193 Applications

• Up/down event and position counters
• Programmable frequency dividers using the preset inputs
• Digital timers and countdown circuits
• Binary counters with LED displays
• Digital logic lab experiments

What's in the Box

• 1 × 74193 binary up/down counter IC

Tip: Hold the unused clock input high: to count up, keep DOWN high and pulse UP, and the count changes on the rising edge. Keep CLR low and LOAD high for normal counting. For a decimal 0–9 version of this chip, use the 74192.

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