SN74LV161ANS

Counter Dividers Overview

The SN74LV161ANS is a 4-bit synchronous binary counter from Texas Instruments, operating within a 2-V to 5.5-V supply range. It features internal look-ahead for high-speed counting and supports mixed-mode voltage operation on all ports. The device includes an asynchronous clear input and synchronous programmable preset capabilities. It utilizes a 16-pin Small Outline Package (SOP) with an operating temperature range of -40°C to +85°C.

Counter Dividers Feature Summary

• Features internal carry look-ahead circuitry to enable fast n-bit cascading without additional gating logic.
• Supports partial-power-down mode through Ioff circuitry that disables outputs to prevent damaging backflow currents.
• Provides synchronous data loading where the load input synchronously sets outputs to match setup data upon the next clock pulse.

Counter Dividers Applications

• High-speed synchronous counting designs
• n-bit cascaded counter applications
• Partial-power-down system implementations

Counter Dividers Procurement Notes

Verify the specific ordering suffix 'NS' corresponds to the SOP-16 package configuration required for your design. Confirm the active production status directly with Texas Instruments or authorized distributors, as component availability and manufacturing sites may change. Ensure the selected variant meets the -40°C to +85°C industrial temperature requirements for your intended environment.

Counter Dividers Selection Notes

Select this component when a low-voltage CMOS 4-bit synchronous counter is required. It is suitable for systems needing mixed-mode voltage compatibility and internal carry look-ahead for simplified multi-stage expansion. Consider the SOP-16 surface-mount package constraints and the specific timing requirements at your target operating voltage before finalizing the design.

Counter Dividers Part Context

This part belongs to the SN74LV161A family of 4-bit synchronous binary counters manufactured by Texas Instruments. The family offers various package options including SOIC, SSOP, TSSOP, and TVSOP. The LV-A series is characterized by its wide 2-V to 5.5-V operating range and support for partial-power-down modes, distinguishing it from standard TTL or higher-voltage logic families.

Counter Dividers Replacement Considerations

SN74LV161ADBR

Counter Dividers FAQ

How does the SN74LV161ANS handle asynchronous clearing?

The device features an asynchronous clear function where a low level at the CLR input immediately sets all four flip-flop outputs low, regardless of the clock, load, or enable input levels.

What is the purpose of the Ioff circuitry in this counter?

The Ioff circuitry supports partial-power-down mode operation by disabling the outputs, which prevents damaging current backflow through the device when it is powered down but other parts of the system remain energized.