SN74ALS163BNS

Counter Dividers Overview

The SN74ALS163BNS is a synchronous 4-bit binary counter from the Texas Instruments ALS logic family, housed in a 16-pin Small Outline Package (SOP). It operates within a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 40 MHz. The device features internal carry look-ahead circuitry for high-speed cascading and includes synchronous preset and clear functions. Designed for commercial applications, it functions reliably across an operating temperature range of 0°C to 70°C.

Counter Dividers Feature Summary

• Features internal carry look-ahead circuitry to enable high-speed n-bit cascading without additional external gating logic.
• Provides fully programmable synchronous preset capability, allowing outputs to be set to any value between 0 and 15 on the next clock pulse.
• Utilizes synchronous counting operation where all flip-flops are clocked simultaneously, eliminating output counting spikes associated with asynchronous designs.

Counter Dividers Applications

• High-speed synchronous counting designs requiring fast propagation.
• Multi-stage n-bit counter systems utilizing ripple-mode or carry look-ahead cascading.
• Digital timing circuits requiring precise synchronous data loading and clearing.

Counter Dividers Procurement Notes

Verify that the ordering suffix 'NS' corresponds to the SOP package variant when sourcing. Confirm the specific revision status of the SN74ALS163B component against current Texas Instruments production data sheets. Ensure compatibility with standard SOP footprints during PCB layout verification.

Counter Dividers Selection Notes

Select this component for applications requiring synchronous binary counting with internal carry lookahead. It is suitable for designs needing simultaneous flip-flop updates to prevent glitches. Compare performance metrics against AS series variants if higher speed or different drive currents are required for the specific system load.

Counter Dividers Part Context

This device belongs to the Texas Instruments SN74ALS163B family of synchronous 4-bit binary counters. It shares functional characteristics with the SN74ALS161B but differs in its clear function implementation. The SN74ALS163B utilizes a synchronous clear, whereas the SN74ALS161B employs an asynchronous clear mechanism.

Counter Dividers Replacement Considerations

SN74ALS161BN

Counter Dividers FAQ

Is the clear function asynchronous or synchronous?

The clear function for the SN74ALS163B is synchronous. A low level at the CLR input sets all four flip-flop outputs low after the next clock pulse.

How does the device handle cascading?

It features internal carry look-ahead circuitry that allows for cascading counters for n-bit synchronous applications without the need for additional external gating.