4029BDM

Overview

The CD4029BDM is a presettable binary or decade up/down counter manufactured by Fairchild Semiconductor. It operates in asynchronous mode and supports both binary and BCD decade counting directions based on input logic levels. The device utilizes CMOS technology and is housed in a 16-lead ceramic dual in-line package (CDIP16). It functions with a supply voltage range of 3V to 15V, offering high noise immunity and low power consumption compatible with TTL standards.

Feature Summary

• Supports parallel load inputs for presetting counter values
• Configurable between binary and BCD decade counting modes
• Directional control allows for up or down counting sequences

Applications

• Digital timing circuits requiring precise count sequences
• Frequency division networks in signal processing systems
• Address generation logic in digital control systems

Procurement Notes

Verify the specific suffix 'BDM' against the official Fairchild Semiconductor datasheet to confirm the ceramic DIP16 package variant and lead composition. Ensure compliance with RoHS directives if required, as older ceramic packages may have different regulatory statuses than modern plastic equivalents. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity.

Selection Notes

Select this component when a robust, radiation-hardened style ceramic package is required for harsh environments. The asynchronous operation suits applications where clock skew is not critical. Consider the wide supply voltage range for flexibility in mixed-voltage systems. Verify that the parallel load feature meets the design requirements for immediate value setting without clock dependency.

Part Context

This part belongs to the standard CD4000 series of CMOS logic devices, widely used in general-purpose digital electronics. The CD4029 specifically addresses counting needs, offering versatility through its binary/decade and up/down capabilities. It serves as a fundamental building block for complex digital counters and timers in industrial and consumer applications.

Replacement Considerations

Compatible substitutes include the CD4029BE (plastic DIP) or equivalent parts from other manufacturers such as Texas Instruments or National Semiconductor, provided the pinout and electrical characteristics match. Verify package dimensions and thermal properties when switching from ceramic to plastic variants.