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Synchronous 4-Bit Counters
74161
ic logic
A synchronous 4-bit counter IC used for counting and generating binary sequences.
In stock
Specifications
3- Operating Voltage
- 5V
- Supply Current
- 10mA
- Interface
- TTL/CMOS
Pinout
16Low source legibility.The original manufacturer datasheet for this part was difficult to read, so this pinout may be incomplete or imperfect. Always confirm against the specific manufacturer’s datasheet before wiring.
| Pin | Name | Functions | Notes |
|---|---|---|---|
| 1 | QD' | GPIO | Output of the 4th stage |
| 2 | QC' | GPIO | Output of the 3rd stage |
| 3 | QB' | GPIO | Output of the 2nd stage |
| 4 | QA' | GPIO | Output of the 1st stage |
| 5 | LD' | GPIO | Load input, active low |
| 6 | CP | GPIO | Clock input, active high |
| 7 | LD/SD' | GPIO | Load/shift input, active low |
| 8 | GND | GND | Ground |
| 9 | SD | GPIO | Shift input, active high |
| 10 | Q3' | GPIO | Output of the 3rd stage |
| 11 | Q2' | GPIO | Output of the 2nd stage |
| 12 | Q1' | GPIO | Output of the 1st stage |
| 13 | VCC | POWER | Supply voltage |
| 14 | QD | GPIO | Output of the 4th stage, active low |
| 15 | QC | GPIO | Output of the 3rd stage, active low |
| 16 | QB | GPIO | Output of the 2nd stage, active low |
Interactive pinout
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74161
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