SN74HC193D

Counter Dividers Overview

The SN74HC193D is a 4-bit synchronous reversible up/down binary counter manufactured by Texas Instruments in the HC logic series. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to 85°C. The device features fully synchronous counting with look-ahead circuitry for cascading, parallel asynchronous load capability for modulo-N lengths, and an asynchronous clear function. It utilizes a 16-pin SOIC package.

Counter Dividers Feature Summary

• Synchronous operation eliminates output counting spikes associated with ripple-clock counters
• Look-ahead circuitry enhances cascaded counter performance without external logic
• Parallel asynchronous load allows independent presetting for modulo-N count lengths
• Outputs can drive up to 10 LSTTL loads

Counter Dividers Applications

• Cascaded binary counting systems
• Modulo-N frequency dividers
• Synchronous digital timing circuits
• Reversible up/down counting applications

Counter Dividers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current Package Option Addendum. Confirm that the component status matches project requirements, as certain packages may be obsolete while others remain active. Ensure RoHS compliance and lead finish specifications align with assembly processes.

Counter Dividers Selection Notes

Select this component when synchronous counting behavior is required to prevent glitches common in asynchronous designs. The HC series offers low power consumption and wide voltage compatibility. Verify that the 16-pin SOIC footprint fits the PCB layout constraints and that the 2V to 6V supply range meets system power specifications.

Counter Dividers Part Context

This part belongs to the SN74HC193 family of 4-bit synchronous reversible counters. It is distinct from the SN74HC191, which lacks the separate down-count clock input. The 'D' suffix indicates a surface-mount SOIC package. Related versions include the SN74HC193N (PDIP) and SN74HC193DR (reel).

Counter Dividers Replacement Considerations

SN74HC193DR

Counter Dividers FAQ

How does the SN74HC193D handle cascading?

It uses dedicated borrow (BO) and carry (CO) outputs that pulse low at terminal counts, allowing direct connection to the UP and DOWN inputs of subsequent counters without external logic.

What is the function of the LOAD input?

The LOAD input enables parallel asynchronous loading of data into the flip-flops, allowing the counter to be preset to any value independently of the count pulses.