74LS161 Synchronous 4-Bit Counter Direct Reset 5V IC DIP-16
The 74LS161 is a synchronous 4-bit binary counter designed to count clock pulses and provide a four-bit binary output. All internal flip-flops respond to the same clock signal, allowing the counter to update its outputs synchronously. It is commonly used in digital systems that require reliable pulse counting and sequential control.
The IC includes a direct, active-low clear input that resets the counter outputs to zero without waiting for a clock pulse. It also provides count-enable inputs and parallel data inputs for controlled counting and loading a preset value. The 74LS161 is suitable for digital logic projects, timing circuits, frequency division, and cascaded counter designs.
Features
- Internal Look-Ahead for Fast Counting.
- Carry Output for n-Bit Cascading.
- Synchronous Counting.
- Synchronously Programmable.
- Load Control Line.
- Diode-Clamped Inputs.
Specifications:
| Product Attribute | Attribute Value |
| Product Category: | Counter ICs |
| Mounting Style: | Through Hole |
| Package/Case: | PDIP-16 |
| Counter Type: | Binary |
| Logic Family: | LS |
| Number of Bits: | 4 bit |
| Counting Sequence: | Up |
| Operating Supply Voltage: | 4.75 V to 5.25 V |
| Minimum Operating Temperature: | 0 C |
| Maximum Operating Temperature: | + 70 C |
| Function: | Counter |
| Operating Temperature Range: | 0 C to + 70 C |
| Output Current: | 8 mA/- 400 uA |
Pinout:
Applications:
- Digital pulse counters.
- Frequency divider circuits.
- Digital timers and clocks.
- Sequential logic systems.
- Event counting.
- Digital instrumentation.
- Cascaded multi-bit counters.
- Microprocessor and digital control circuits.
Packages Included:
- 1 × 74161 Synchronous 4-Bit Counter IC, DIP-16.
