74LS390FP-E

Counter Dividers Overview

The Renesas Electronics Corporation 74LS390FP-E is a dual decade counter integrated circuit belonging to the standard 74LS series. It incorporates two independent four-bit counters capable of dividing by two and five, enabling cycle lengths up to divide-by-100. The device utilizes asynchronous negative edge triggering and features master-slave flip-flops with additional gating logic. Designed for TTL applications, it operates within a specified voltage range and supports both up-counting directions.

Counter Dividers Feature Summary

• Dual independent four-bit decade counter architecture
• Asynchronous negative edge triggered operation
• Supports divide-by-two and divide-by-five functions
• Capable of biquinary counter configurations

Counter Dividers Applications

• Digital counting systems requiring decade division
• Frequency divider circuits in industrial equipment
• Consumer electronics utilizing TTL logic families
• Timing and sequencing control modules

Counter Dividers Procurement Notes

Verify the exact suffix designation against official Renesas documentation to confirm package type and temperature grade. Ensure compatibility with existing 5V TTL logic levels. Confirm RoHS compliance status through current datasheets as manufacturing processes may evolve. Cross-reference pinouts with legacy Hitachi specifications if integrating into established designs.

Counter Dividers Selection Notes

Select this component when dual independent decade counting is required within a single package. It serves as a direct replacement for legacy HD74LS390 units. Consider the asynchronous nature of the clock inputs when designing timing-critical sequences. Verify that the operating temperature range meets the specific environmental requirements of the target application.

Counter Dividers Part Context

This part belongs to the broader 74LS family of general-purpose logic ICs, which maintains a long market history. Renesas continues support for these legacy bipolar logic devices alongside modern CMOS alternatives. The FP-E suffix typically indicates a specific plastic DIP package variant suitable for through-hole mounting in standard electronic assemblies.

Counter Dividers Replacement Considerations

HD74LS390P is a documented equivalent offering identical logical functionality. SN74LS390N from Texas Instruments provides a compatible alternative for system redundancy. DM74ALS390 offers faster switching speeds but requires verification of power supply constraints.