SN74ALS193ADR

Counter Dividers Overview

The SN74ALS193ADR is a synchronous, reversible 4-bit up/down binary counter manufactured by Texas Instruments. It operates on a single 5 V supply with a recommended range of 4.5 V to 5.5 V. The device features fully synchronous counting operation triggered by low-to-high transitions on UP or DOWN inputs, eliminating output counting spikes. It includes parallel asynchronous load for modulo-N division and an asynchronous clear function. Maximum clock frequency reaches 30 MHz, with propagation delays ranging from 3 ns to 28 ns depending on the input-output path.

Counter Dividers Feature Summary

• Synchronous counting operation eliminates output counting spikes associated with ripple-clock counters
• Parallel asynchronous load allows independent presetting of outputs without count pulses
• Asynchronous clear forces all outputs to low level independently of other inputs
• Borrow and carry outputs enable direct cascading without external circuitry

Counter Dividers Applications

• Modulo-N dividers via programmable preset inputs
• Cascaded multi-stage binary counting systems
• Reversible timing and sequencing circuits
• Digital control logic requiring simultaneous output transitions

Counter Dividers Procurement Notes

Verify that the ordering suffix 'ADR' corresponds to the SOIC-16 package variant as documented in the Package Option Addendum. Confirm RoHS compliance status and lead finish specifications (NIPDAU) match project requirements. Ensure operating temperature range aligns with the commercial grade specification of 0°C to 70°C rather than the military grade range.

Counter Dividers Selection Notes

Select this component when synchronous operation is required to prevent glitching during state transitions. The ALS series offers lower power consumption compared to standard LS counterparts while maintaining compatible logic levels. Verify that the 30 MHz maximum clock frequency meets system timing constraints. Consider the buffered UP, DOWN, and LOAD inputs if driving long parallel word lines to reduce driver loading.

Counter Dividers Part Context

This part belongs to the SN74ALS193A family of synchronous 4-bit up/down counters. It is the commercial-grade version characterized for operation between 0°C and 70°C. The military-grade equivalent is the SN54ALS193A, rated for -55°C to 125°C. The device utilizes Advanced Low-Power Schottky (ALS) logic technology within the broader 74-series ecosystem.

Counter Dividers Replacement Considerations

SN74LS193DR: Compatible pinout but slower speed and higher power consumption.