SN74ALS193AD

Counter Dividers Overview

The SN74ALS193AD is a synchronous, reversible 4-bit up/down binary counter manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 30 MHz. The device features look-ahead circuitry for cascaded counters and allows parallel asynchronous loading for modulo-N count lengths. It includes an asynchronous clear function and buffered UP/DOWN inputs to reduce driver loading. Packaged in a 16-pin SOIC (D) format, it functions over an operating temperature range of 0°C to 70°C.

Counter Dividers Feature Summary

• Synchronous counting operation eliminates output counting spikes associated with asynchronous ripple-clock counters.
• Parallel asynchronous load capability enables the implementation of modulo-N dividers by modifying count length via preset inputs.
• Look-ahead circuitry enhances performance when counters are cascaded without external circuitry.
• Buffered UP, DOWN, and LOAD inputs significantly reduce drive requirements and current demands on clock drivers.

Counter Dividers Applications

• Cascaded binary counting systems
• Modulo-N frequency division circuits
• Synchronous digital timing control

Counter Dividers Procurement Notes

Verify that the component matches the SN74ALS193AD designation and corresponds to the SOIC-16 package configuration. Confirm the manufacturer is Texas Instruments and check the datasheet revision status. Ensure the part meets the specified commercial temperature range of 0°C to 70°C. Validate RoHS compliance and lead finish specifications against project requirements before integration.

Counter Dividers Selection Notes

Select this component for applications requiring precise synchronous counting without propagation delay accumulation typical of ripple counters. It is suitable for designs needing independent asynchronous clearing and parallel data loading. Consider the 30 MHz maximum clock frequency and the specific power consumption characteristics under recommended operating conditions. Ensure the system logic levels align with the ALS family input/output voltage thresholds.

Counter Dividers Part Context

This device belongs to the Texas Instruments SN74ALS193A series of synchronous 4-bit up/down counters. It is part of the broader 74ALS logic family, designed for high-speed digital applications. The 'AD' suffix specifically denotes the plastic small-outline (SOIC) surface-mount package variant, distinguishing it from through-hole or ceramic options available within the same logical family.

Counter Dividers Replacement Considerations

Compatible substitutes include other SN74ALS193 variants such as SN74ALS193AN (PDIP package). Cross-family replacements like SN74HC193 may require voltage level adjustments. Verify pinout compatibility and electrical characteristics against the original datasheet specifications before substitution.