MM74HCT193WM

Counter Dividers Overview

The MM74HCT193WM is a presettable synchronous 4-bit binary up/down counter belonging to the HCT logic series. It features separate clock inputs for counting up (CPU) and counting down (CPD), allowing independent control of direction. The device includes asynchronous parallel load and master reset capabilities, enabling immediate data loading or clearing regardless of clock states. Terminal count outputs facilitate cascading multiple stages without external logic. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a wide operating temperature range from -40 °C to +85 °C.

Counter Dividers Feature Summary

• Synchronous reversible 4-bit binary counting with separate up and down clock inputs
• Asynchronous parallel load and master reset functions for direct data control
• Expandable architecture allowing multi-stage connection without additional external logic gates

Counter Dividers Applications

• Digital frequency division circuits requiring bidirectional counting
• Time-base generators in digital clocks and timers
• Position control systems using reversible counters

Counter Dividers Procurement Notes

Verify the specific manufacturer source, as National Semiconductor was acquired by Texas Instruments. Confirm that the MM74HCT193WM designation corresponds to the intended HCT-series specifications. Check for availability of equivalent parts from current manufacturers like Nexperia or onsemi if original production status is discontinued. Ensure package compatibility matches the required SOIC-16 footprint.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit bidirectional counter is required with TTL-compatible input levels provided by the HCT series. It is suitable for designs needing asynchronous loading and resetting capabilities. Consider the operating temperature range and supply voltage constraints. Verify pinout compatibility if replacing older components in existing layouts.

Counter Dividers Part Context

This part belongs to the standard 74HCT logic family, designed for CMOS technology with TTL-compatible inputs. It serves as a fundamental building block for sequential logic circuits. The 'WM' suffix typically indicates a surface-mount SOIC package variant. Similar devices include the 74HC193 for pure CMOS inputs and other 74xx series counters.

Counter Dividers Replacement Considerations

• 74HCT193
• 74HCT193N
• 74HCT193D

Counter Dividers FAQ

How does the MM74HCT193WM handle counting direction?

It uses two separate clock inputs: CPU for counting up and CPD for counting down. Only one clock input should be held HIGH at any time to ensure predictable behavior.

Can the counter be cleared asynchronously?

Yes, the Master Reset (MR) input allows asynchronous clearing of all outputs to LOW, overriding both clock inputs and parallel load signals.