CD4029BM Binary Counter 4-Bit Logic IC Equivalent & Substitute Parts

Part Overview

The CD4029BM is a 4-bit binary counter logic IC manufactured by Texas Instruments in the 4000B series. This component functions as a synchronous counter with both up and down counting capability, operating across a wide voltage supply range of 3V to 18V. The CD4029BM is currently in Last Time Buy status, making identification of active equivalent and substitute parts essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Logic Type	Binary Counter, Decade
Number of Bits per Element	4
Direction	Up, Down
Timing	Synchronous
Trigger Type	Positive Edge
Count Rate	11 MHz (CD4029BM), 10 MHz (onsemi variants)
Voltage Supply Range	3V ~ 18V
Operating Temperature	-55°C ~ 125°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CD4029BM is determined by strict equivalence across the following critical parameters: logic type (binary counter, decade), bit width (4-bit), counting direction (up/down), timing architecture (synchronous), trigger mechanism (positive edge), package form factor (16-SOIC), and compliance certifications (ROHS3, REACH Unaffected).

The substitute parts identified maintain functional and electrical compatibility through matching these core specifications. Minor variations in count rate (10 MHz versus 11 MHz) remain within acceptable operational margins for most applications, as both rates exceed typical synchronous counter timing requirements in standard logic circuits. All substitute parts operate within the identical voltage supply envelope (3V ~ 18V) and temperature range (-55°C ~ 125°C).

Parameter Comparison

Parameter	CD4029BM (TI)	CD4029BM96 (TI)	MC14029BDR2G (onsemi)	NLV14029BDR2G (onsemi)
Manufacturer	Texas Instruments	Texas Instruments	onsemi	onsemi
Logic Type	Binary Counter, Decade	Binary Counter, Decade	Binary Counter, Decade	Binary Counter, Decade
Number of Bits	4	4	4	4
Direction	Up, Down	Up, Down	Up, Down	Up, Down
Timing	Synchronous	Synchronous	Synchronous	Synchronous
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Count Rate	11 MHz	11 MHz	10 MHz	10 MHz
Voltage Supply	3V ~ 18V	3V ~ 18V	3V ~ 18V	3V ~ 18V
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Last Time Buy	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the CD4029BM, the CD4029BM96 represents the primary substitute path, as it maintains identical electrical specifications and manufacturer lineage while offering active product status and significantly higher inventory availability (50,400 units versus 860 units). Both parts are Texas Instruments products within the 4000B series.

The onsemi alternatives—MC14029BDR2G and NLV14029BDR2G—provide functionally equivalent substitution with cross-manufacturer compatibility. Both onsemi variants operate at 10 MHz count rate compared to the 11 MHz specification of the Texas Instruments parts; this differential remains operationally transparent in standard synchronous counter applications. All four parts maintain ROHS3 compliance and REACH unaffected status, supporting regulatory requirements across industrial and commercial applications.

Selection between Texas Instruments and onsemi variants should be based on supply chain availability, procurement lead times, and existing qualification documentation within the design organization. Packaging format (Cut Tape & Digi-Reel for CD4029BM96 versus Tape & Reel for onsemi parts) may influence handling and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the CD4029BM96 directly replace the CD4029BM in existing designs?

A: Yes. The CD4029BM96 maintains identical electrical specifications, package form factor (16-SOIC), and functional behavior. The primary difference is product status (Active versus Last Time Buy) and packaging format (Cut Tape & Digi-Reel versus Tube).

Q: Are the onsemi parts (MC14029BDR2G and NLV14029BDR2G) pin-compatible with the Texas Instruments CD4029BM?

A: Yes. Both onsemi variants share the 16-SOIC package footprint and pinout configuration. The 4-bit binary counter, decade logic type, synchronous timing, and positive edge trigger mechanism are functionally identical across all four parts.

Q: What is the significance of the 1 MHz difference in count rate between Texas Instruments (11 MHz) and onsemi (10 MHz) variants?

A: The count rate specification defines maximum clock frequency. Both 10 MHz and 11 MHz exceed typical synchronous counter timing requirements in standard logic applications. The 1 MHz differential does not impact functional compatibility or circuit behavior in conventional designs.

Q: Do all substitute parts meet the same compliance requirements as the CD4029BM?

A: Yes. All four parts are ROHS3 compliant and REACH unaffected, meeting identical regulatory standards. Moisture Sensitivity Level (MSL) is 1 (Unlimited) across all variants.

Q: What packaging options are available among the substitute parts?

A: CD4029BM is supplied in Tube packaging. CD4029BM96 is available in Cut Tape & Digi-Reel format. MC14029BDR2G and NLV14029BDR2G are supplied in Tape & Reel format. All maintain the same 16-SOIC component package.

Q: Which substitute part offers the best inventory availability?

A: CD4029BM96 provides the highest stock level at 50,400 units, followed by MC14029BDR2G (2,130 units) and NLV14029BDR2G (692 units).

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