74LS161 4-Bit Binary Counter IC

A synchronous reversible up-down counter with internal carry look-ahead feature

• Supply Voltage: 4.75 – 5.25V
• Input HIGH Voltage: 2.0V
• Input LOW Voltage: 0.8V
• Input Clamp Diode Voltage: -1.5V
• HIGH Level Output Current: -0.4mA
• LOW Level Output Current: 8mA

Features:

• Synchronously programmable
• Internal look-ahead for fast counting
• Carry output for n-bit cascading
• Synchronous counting

The 74LS161 comes with a 4-bit binary counter in which Synchronous operation is provided by all flip-flops clocked simultaneously. The buffered clock input triggers the four flip-flops on the rising fringe of the clock input waveform. The load input circuitry allows loading with the carry-enable output of cascaded counters.

The clear function for the 74LS161 is synchronous. A low level at the clear input sets all four of the flip-flop outputs LOW, regardless of the level of clock, load, or enable inputs. This synchronous clear allows easy modification of the count length.

The gate output is connected to the clear input to synchronously clear the counter to all low outputs.

Specifications:

• Supply Voltage: 4.75 – 5.25V
• Input HIGH Voltage: 2.0V
• Input LOW Voltage: 0.8V
• Input Clamp Diode Voltage: -1.5V
• HIGH Level Output Current: -0.4mA
• LOW Level Output Current: 8mA

Package Includes:

• 1 X 74LS161 IC – (SMD Package) 4-Bit Synchronous Binary Counter IC (74161 IC)

Images are for illustration only; actual product may vary.