This datasheet details the SN54LV161A and SN74LV161A 4-bit synchronous binary counters, covering operation, timing, electrical characteristics, and ordering…
The SN54LV161A and SN74LV161A devices are 4-bit synchronous binary counters designed for 2-V to 5.5-V operation. They feature internal carry look-ahead for fast counting, synchronous presetting, and asynchronous clear functionality. The counters support mixed-mode voltage operation and include Ioff circuitry for partial-power-down mode to prevent damaging current backflow.
| Supply Voltage Range | 2 V to 5.5 V |
|---|---|
| Maximum Propagation Delay | 9.5 ns |
| Output Ground Bounce | < 0.8 V |
| Output Voltage Undershoot | > 2.3 V |
| Latch-Up Performance | Exceeds 100 mA |
| ESD Protection (Human-Body Model) | 200 V |
| ESD Protection (Charged-Device Model) | 1000 V |
| Storage Temperature Range | -65 °C to 150 °C |
The devices are designed for 2-V to 5.5-V V CC operation.
The clear function for the devices is asynchronous.
Yes, they can be preset to any number between 0 and 9 or 15.
Yes, they are fully specified for partial-power-down applications using Ioff.