74HCT193D,652

Counter Dividers Overview

The Nexperia 74HCT193D,652 is a presettable synchronous 4-bit binary up/down counter in the HCT logic family. It operates within a supply voltage range of 4.5 V to 5.5 V and features separate count-up (CPU) and count-down (CPD) clock inputs. The device includes asynchronous parallel load and master reset capabilities. Outputs change state synchronously with LOW-to-HIGH clock transitions. Terminal count outputs (TCU/TCD) facilitate cascading. It is housed in a 16-lead SO plastic small outline package (SOT109-1).

Counter Dividers Feature Summary

• Supports synchronous reversible 4-bit binary counting using dedicated up and down clock inputs.
• Features asynchronous parallel load for immediate data setting and asynchronous master reset for clearing outputs.
• Provides expandable terminal count outputs that duplicate clock waveforms for multistage counter applications.

Counter Dividers Applications

• Cascaded up/down counters
• Frequency division circuits
• Digital timing sequences

Counter Dividers Procurement Notes

Verify the specific ordering suffix

Counter Dividers Selection Notes

Select this component when TTL-compatible input levels are required for CMOS counters. Ensure the application utilizes separate clock lines for up and down operations. Verify that the operating temperature range meets system requirements, as the device supports extended industrial ranges.

Counter Dividers Part Context

This part belongs to the 74HCT series, which bridges TTL and CMOS logic families. It shares functional similarities with the 74HC193 but differs in input voltage thresholds. The D,652 suffix indicates the SO16 package variant manufactured by Nexperia.

Counter Dividers Replacement Considerations

The 74HCT193D,653 is a parameter-equivalent alternative from Nexperia. Other manufacturers may offer pin-compatible devices, but verify input/output electrical characteristics against the HCT specification.

Counter Dividers FAQ

How does the device handle simultaneous clock pulses?

Only one clock input (CPU or CPD) can be held HIGH at any time to guarantee predictable behavior. If both are active, operation is undefined.

What is the function of the TCU and TCD outputs?

These outputs go LOW at terminal count states (15 for up, 0 for down) and duplicate the respective clock waveforms, allowing them to drive the clock inputs of subsequent counter stages.