CD74HC390M

Counter Dividers Overview

The CD74HC390M is a dual decade counter integrated circuit manufactured by Harris Corporation, belonging to the 74HC/UH logic series. It utilizes CMOS technology and features two independent asynchronous counters within a single package. The device supports negative edge-triggered counting in an up direction with a 3-bit architecture per counter section. It operates on a supply voltage range of 2V to 6V and functions reliably across an extended temperature range from -55°C to 125°C. The component is housed in a 16-pin PDSO surface-mount package.

Counter Dividers Feature Summary

• Dual independent decade counter configuration providing divide-by-2 and divide-by-5 functionality
• Asynchronous operation triggered by negative clock edges for straightforward timing control
• Extended industrial temperature rating suitable for harsh environmental conditions

Counter Dividers Applications

• Digital frequency division circuits requiring specific integer ratios
• Binary-coded decimal (BCD) counting applications in digital systems
• Timing sequence generation for asynchronous control logic

Counter Dividers Procurement Notes

Verify manufacturer origin as Harris Corporation rather than Texas Instruments, noting that TI acquired Harris Semiconductor assets. Confirm RoHS compliance status, as some sources indicate non-compliance for this specific part number. Ensure the package type matches the required PDSO16 footprint and validate the operating voltage range against system requirements before integration.

Counter Dividers Selection Notes

Select this component when dual independent decade counters are required in a compact surface-mount form factor. The HC series offers low power consumption compared to older logic families while maintaining compatible speeds. Verify compatibility with the target system's voltage levels, as the wide 2V to 6V range allows flexibility but requires proper level shifting if interfacing with different logic standards.

Counter Dividers Part Context

This component belongs to the 74HC/UH series of high-speed CMOS logic devices originally produced by Harris Corporation. These counters are designed for general-purpose digital applications where low power and moderate speed are prioritized. The CD74HC390M specifically provides two separate decade counters, making it distinct from binary-only counter variants in the same family.

Counter Dividers Replacement Considerations

CD74HCT390M: Compatible HCT version with TTL-compatible input levels.