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Product Detailed Parameters
- Description：DUAL 4-BIT DECADE/BINARY COUNTER
- Series：*
- Mfr：Rochester Electronics, LLC
- Package：Bulk
- Logic Type：-
- Direction：-
- Number of Elements：-
- Number of Bits per Element：-
- Reset：-
- Timing：-
- Count Rate：-
- Trigger Type：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Voltage - Supply：-
- Grade：-
- Qualification：-
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Overview
The 54HC390J/B is a dual-decade counter manufactured by Rochester Electronics, belonging to the HC/UH logic series. It features two independent BCD counters within a single package, utilizing asynchronous negative-edge triggering for up-counting operations. The device is housed in a ceramic DIP-16 package with glass-sealed construction, designed for high reliability. It supports load and preset inputs for flexible configuration. The component operates across a wide military temperature range from -55°C to 125°C, ensuring stability in demanding environments.
Feature Summary
- Dual independent decade counter architecture providing two separate counting channels
- Asynchronous negative-edge triggered operation for reliable sequential counting
- Ceramic DIP-16 package with glass-sealed construction for enhanced durability
- Supports load and preset functions for versatile data initialization
Applications
- Military aerospace electronic systems requiring extended temperature tolerance
- Industrial control equipment operating in harsh environmental conditions
- High-reliability communication infrastructure components
- Defense avionics timing and sequencing circuits
Procurement Notes
Verify that the specific part number matches the required HC/UH series specifications and ceramic packaging type. Confirm the manufacturer origin is Rochester Electronics and check for any relevant quality certifications such as QML or MIL-PRF-38535 compliance if applicable to your procurement standards. Ensure the component meets the specified temperature range requirements for your deployment environment.
Selection Notes
Select this component when a dual-decade counter is required for applications demanding high reliability and wide temperature operation. The ceramic package offers superior protection against moisture and mechanical stress compared to plastic alternatives. Consider this option for designs where asynchronous counting and negative-edge triggering align with the system timing architecture.
Part Context
This component belongs to the broader family of HC/UH series logic devices produced by Rochester Electronics. These parts are typically re-manufactured or sourced from original suppliers under authorization to support long-term availability. The 54HC390J/B specifically addresses the need for robust decade counting solutions in sectors where standard commercial components may not suffice due to environmental constraints.
Replacement Considerations
Compatible substitutes include other dual-decade counters from the same logic family, such as the SN54HC390 or equivalent variants from other manufacturers offering similar ceramic DIP-16 packages and military-grade temperature ratings.
