CD4021BCN Equivalent & Substitute Parts

Part Overview

The CD4021BCN is an 8-stage static shift register manufactured by onsemi, designed for parallel or serial to serial data conversion in logic applications. This component operates across a wide supply voltage range of 3V to 18V and maintains functionality across industrial temperature ranges from -55°C to 125°C. The CD4021BCN is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

CD4021BCN

onsemiIn Stock: 964CD4021BCN Datasheet

Current PartRFQ

CD4021BE

Texas InstrumentsIn Stock: 1612CD4021BE Datasheet

DirectRFQ

CD4014BE

Texas InstrumentsIn Stock: 3187CD4014BE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD4021BCN are qualified based on strict parameter matching across the following criteria:

• Logic Type: Shift Register
• Number of Elements: 1
• Number of Bits per Element: 8
• Function: Parallel or Serial to Serial
• Output Type: Push-Pull
• Voltage - Supply: 3V ~ 18V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Series: 4000B

Two substitute parts meet these electrical and mechanical requirements: CD4021BE (direct manufacturer equivalent from Texas Instruments) and CD4014BE (parametric equivalent from Texas Instruments). Both components maintain identical functional specifications and package configurations, enabling direct substitution in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

CD4021BE is the primary substitute for CD4021BCN. Both components share identical base product numbering (CD4021) and are manufactured within the same 4000B logic series. CD4021BE is currently in active production status with ROHS3 compliance certification, providing long-term availability and regulatory alignment for new designs.

CD4014BE serves as a parametric equivalent when CD4021BE is unavailable. While manufactured under a different base product number (CD4014), it maintains all critical electrical and mechanical specifications required for functional equivalence. CD4014BE is also active production status with ROHS3 compliance.

Both Texas Instruments alternatives provide superior long-term supply security compared to the obsolete CD4021BCN, with documented active inventory levels supporting immediate procurement.

Frequently Asked Questions (FAQ)

Q: Can CD4021BE directly replace CD4021BCN in existing designs?

A: Yes. CD4021BE maintains identical electrical specifications (3V to 18V supply, -55°C to 125°C operating range, 8-bit shift register function) and physical packaging (16-DIP). No circuit modifications are required for direct substitution.

Q: What is the difference between CD4021BE and CD4014BE?

A: Both components are 8-bit shift registers in 16-DIP packages with identical electrical specifications. The primary difference is the base product number designation (CD4021 versus CD4014). Both are functionally equivalent for parallel or serial to serial conversion applications.

Q: Are the Texas Instruments substitutes pin-compatible with CD4021BCN?

A: Yes. Both CD4021BE and CD4014BE use the 16-PDIP package configuration with identical pin assignments for shift register operation. Physical and electrical pin compatibility is maintained.

Q: What compliance certifications apply to the substitute parts?

A: Both CD4021BE and CD4014BE are ROHS3 compliant and REACH unaffected. These certifications support use in regulated manufacturing environments and export applications.

Q: Why is CD4021BCN listed as obsolete?

A: CD4021BCN is no longer in active production by onsemi. Texas Instruments continues manufacturing equivalent CD4021BE and CD4014BE components, ensuring design continuity and supply availability.