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Product Detailed Parameters
- Description：DIVIDE BY 8 COUNTER
- Series：-
- Mfr：National Semiconductor
- 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 National Semiconductor 4022BDM is a CMOS ring counter belonging to the 4000/14000/40000 series. It features an 8-bit synchronous up-counting architecture with positive edge triggering and eight decoded outputs. The device operates on a nominal 5V supply voltage and utilizes a 40-pin ceramic dual in-line package (DIP). Designed for military specifications, it supports a wide operating temperature range from -55°C to 125°C.
Feature Summary
- Synchronous 8-bit ring counter functionality with positive edge triggering
- Eight decoded outputs providing distinct state indication
- Military-grade construction using ceramic DIP packaging
- Wide operational temperature capability suitable for harsh environments
Applications
- Military aerospace control systems requiring high reliability
- Industrial automation sequencing logic
- Harsh environment digital state machines
Procurement Notes
Verify component authenticity through authorized channels due to potential availability of refurbished or obsolete stock. Confirm specific screening levels such as MIL-STD-883 compliance if required for mission-critical applications. Ensure proper handling procedures are followed given the ceramic package type and historical manufacturing status.
Selection Notes
Select this component when a robust, synchronous 8-bit counting solution is needed for extreme temperature conditions. Consider the 40-pin ceramic DIP form factor for legacy socket compatibility. Evaluate power consumption requirements against standard CMOS characteristics within the specified voltage range.
Part Context
This part belongs to the extensive 4000-series CMOS logic family produced by National Semiconductor, now part of Texas Instruments. These components established industry standards for low-power digital logic. The 4022 variant specifically provides decoded outputs, distinguishing it from binary counters like the 4017.
Replacement Considerations
Identify equivalent parts from manufacturers offering military-grade 4000-series CMOS logic. Verify pinout compatibility and electrical parameters such as supply voltage and temperature ranges before substitution.
