CD4027BCN Equivalent & Substitute Parts

Part Overview

The CD4027BCN is a dual JK-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 16-DIP package. This device provides two independent 1-bit JK flip-flops with complementary outputs, set/preset and reset functions, and positive edge triggering. The CD4027BCN is classified as obsolete, making equivalent substitute parts necessary for ongoing production, maintenance, and new designs requiring this functionality.

Substiute Parts

CD4027BCN

onsemiIn Stock: 4252CD4027BCN Datasheet

Current PartRFQ

CD4027BE

Texas InstrumentsIn Stock: 2428CD4027BE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4027BCN is determined by strict equivalence across the following critical parameters:

• Functional type: Dual JK-type flip-flop with 1-bit elements
• Output configuration: Complementary outputs
• Trigger mechanism: Positive edge triggering
• Set/Preset and Reset functionality
• Package form factor: 16-DIP (0.300", 7.62mm) through-hole mounting
• Electrical compatibility: Supply voltage range, output current capability, propagation delay, and quiescent current

The CD4027BE from Texas Instruments qualifies as a direct substitute because it maintains identical functional architecture, package specification, and core electrical parameters within acceptable operating margins. Both devices belong to the 4000B logic series and support the same temperature range.

Parameter Comparison

Engineering Selection Recommendations

The CD4027BE from Texas Instruments is a qualified substitute for the obsolete CD4027BCN. Selection should be based on the following factors:

Product Status: The CD4027BCN is obsolete, while the CD4027BE is active and maintains current manufacturing support. For new designs and ongoing production, the CD4027BE is the appropriate choice.

Compliance and Certifications: The CD4027BE is RoHS3 compliant, meeting modern environmental and regulatory standards. Both devices are REACH unaffected and carry EAR99 export classification.

Electrical Performance: The CD4027BE demonstrates superior electrical characteristics, including higher clock frequency (24 MHz vs. 15.5 MHz), faster propagation delay (90 ns vs. 130 ns), and lower output current draw (6.8 mA vs. 8.8 mA). These improvements provide design margin and reduced power consumption.

Supply Voltage Compatibility: The CD4027BE supports an extended supply voltage range (3V ~ 18V) compared to the CD4027BCN (3V ~ 15V), offering greater flexibility in power supply design.

Package and Pinout: Both devices use identical 16-DIP through-hole packaging with matching pinouts, enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the CD4027BE be used as a direct replacement for the CD4027BCN in existing designs?

A: Yes. The CD4027BE is pin-compatible and functionally equivalent. Both devices provide dual JK-type flip-flops with complementary outputs, positive edge triggering, and identical package form factors. No circuit modifications are required for substitution.

Q: What are the key differences between these two parts?

A: The CD4027BE offers improved performance specifications: higher maximum clock frequency (24 MHz vs. 15.5 MHz), faster propagation delay (90 ns vs. 130 ns), lower output current (6.8 mA vs. 8.8 mA), and extended supply voltage range (up to 18V vs. 15V). The CD4027BE is also active and RoHS3 compliant, while the CD4027BCN is obsolete.

Q: Are there any thermal or operating condition limitations when substituting the CD4027BE?

A: No. Both devices share identical operating temperature ranges (-55°C ~ 125°C) and quiescent current specifications (4 µA). The CD4027BE's improved propagation delay and lower output current may reduce thermal generation in high-frequency applications.

Q: Does the CD4027BE require different PCB layout or mounting considerations?

A: No. Both devices use through-hole 16-DIP packaging with 0.300" (7.62mm) row spacing. Existing PCB designs and mounting procedures are fully compatible without modification.

Q: What is the supply voltage compatibility range for the CD4027BE?

A: The CD4027BE operates across 3V to 18V, providing a wider range than the CD4027BCN (3V to 15V). Designs using the original part at 15V or below will operate without issue. Designs requiring higher supply voltages benefit from the extended range.

Q: Is the CD4027BE suitable for new product development?

A: Yes. The CD4027BE is an active product with current manufacturing support and RoHS3 compliance, making it the appropriate choice for new designs requiring dual JK-type flip-flop functionality in 16-DIP packaging.