CD4025BCN Equivalent & Substitute Parts

Part Overview

The CD4025BCN is a NOR Gate IC featuring 3 channels with 3 inputs per channel, packaged in a 14-MDIP configuration. Manufactured by onsemi, this component operates across a supply voltage range of 3V to 15V and is designed for digital logic applications requiring NOR gate functionality. The product is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, repairs, and legacy design support.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	3
Number of Inputs	3
Voltage - Supply	3V ~ 15V
Current - Quiescent (Max)	1 µA
Current - Output High, Low	3.4mA, 3.4mA
Input Logic Level - Low	1.5V ~ 4V
Input Logic Level - High	4.6V ~ 11V
Max Propagation Delay @ V, Max CL	70ns @ 15V, 50pF
Operating Temperature	-55°C ~ 125°C
Mounting Type	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)
Series	4000B
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CD4025BCN is determined by strict equivalence across the following critical parameters:

Logic Type: NOR Gate with identical 3-channel, 3-input configuration
Voltage Supply Range: Must support the 3V to 15V operating window
Current Characteristics: Quiescent current and output drive capabilities must match or exceed specifications
Input Logic Levels: Threshold voltages must be compatible with existing circuit designs
Operating Temperature Range: Must maintain -55°C to 125°C performance envelope
Package Type: 14-DIP through-hole mounting with 0.300" (7.62mm) pitch
Series Classification: 4000B CMOS logic family

The CD4025BE qualifies as a direct substitute based on these parameters, with allowable variations in maximum propagation delay and maximum supply voltage that do not compromise circuit functionality.

Parameter Comparison

Parameter	CD4025BCN (onsemi)	CD4025BE (Harris Corporation)	Compatibility
Logic Type	NOR Gate	NOR Gate	Identical
Number of Circuits	3	3	Identical
Number of Inputs	3	3	Identical
Voltage - Supply	3V ~ 15V	3V ~ 18V	Compatible (CD4025BE supports extended range)
Current - Quiescent (Max)	1 µA	1 µA	Identical
Current - Output High, Low	3.4mA, 3.4mA	3.4mA, 3.4mA	Identical
Input Logic Level - Low	1.5V ~ 4V	1.5V ~ 4V	Identical
Input Logic Level - High	4.6V ~ 11V	4.6V ~ 11V	Identical
Max Propagation Delay @ V, Max CL	70ns @ 15V, 50pF	90ns @ 15V, 50pF	Compatible (CD4025BE has longer delay)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	Identical
Series	4000B	4000B	Identical
RoHS Status	RoHS non-compliant	RoHS non-compliant	Identical

Engineering Selection Recommendations

The CD4025BE manufactured by Harris Corporation is a qualified substitute for the CD4025BCN. Both components share identical logic functionality, pin configuration, and core electrical characteristics within the 4000B CMOS logic family.

The CD4025BE provides an extended supply voltage range (3V to 18V versus 3V to 15V), which offers additional operational flexibility without compromising compatibility. The maximum propagation delay specification of 90ns at 15V and 50pF load is longer than the CD4025BCN specification of 70ns, but remains within acceptable parameters for most legacy circuit applications.

Both parts are classified as obsolete and carry identical RoHS non-compliant and REACH unaffected certifications. Selection between these parts should be based on component availability and inventory status rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can the CD4025BE be used as a direct replacement for the CD4025BCN in existing designs?

A: Yes. Both components are pin-compatible 14-DIP packages with identical NOR gate logic configuration, input/output current specifications, and operating temperature range. The extended supply voltage range of the CD4025BE does not create compatibility issues in circuits designed for the CD4025BCN.

Q: What is the significance of the propagation delay difference between these parts?

A: The CD4025BCN specifies 70ns maximum propagation delay while the CD4025BE specifies 90ns at identical test conditions (15V supply, 50pF load). This 20ns difference is typical among manufacturers of the same logic family and does not affect pin compatibility or logic function. Applications with strict timing requirements should evaluate this parameter against circuit specifications.

Q: Are there any package or mounting differences between these substitutes?

A: No. Both the CD4025BCN and CD4025BE use identical 14-DIP through-hole packaging with 0.300" (7.62mm) pitch. They are mechanically and electrically interchangeable at the board level.

Q: Why are both parts classified as obsolete?

A: The CD4025 is part of the 4000B CMOS logic family, which has been largely superseded by modern logic families. However, these components remain available through inventory channels for legacy system support and repair applications.

Q: What compliance certifications apply to these parts?

A: Both the CD4025BCN and CD4025BE are RoHS non-compliant and REACH unaffected. They carry identical regulatory classifications under ECCN EAR99 and HTSUS 8542.39.0001.

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