CD4521BEG4 Equivalent & Substitute Parts

Part Overview

The CD4521BEG4 is a 24-bit divide-by-2 counter IC manufactured by Texas Instruments, part of the 4000B logic series. This component functions as a negative-edge-triggered divider with asynchronous reset capability, designed for frequency division and counting applications in digital logic circuits.

The CD4521BEG4 is discontinued at DiGi Electronics, necessitating identification of functionally equivalent substitute parts. The primary substitute maintains identical electrical and mechanical specifications while offering active product status and improved availability.

Substiute Parts

CD4521BEG4

Texas InstrumentsIn Stock: 970CD4521BEG4 Datasheet

Current PartRFQ

CD4521BE

Texas InstrumentsIn Stock: 15383CD4521BE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4521BEG4 is determined by strict equivalence across the following critical parameters:

• Logic Type: Divide-by-2 counter function
• Bit Configuration: 24-bit single element
• Trigger Mechanism: Negative edge triggering
• Reset Type: Asynchronous reset
• Maximum Count Rate: 13 MHz minimum
• Supply Voltage Range: 3 V to 18 V
• Package Type: 16-DIP through-hole configuration
• Thermal Operating Range: -55°C to 125°C
• Compliance: ROHS3 and REACH standards

The CD4521BE meets all substitution criteria as a direct functional equivalent within the same 4000B series, differing only in product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The CD4521BE is a direct substitute for the CD4521BEG4. Both parts are manufactured by Texas Instruments within the 4000B series and maintain identical electrical specifications, thermal ratings, and compliance certifications. The CD4521BE offers the advantage of active product status with significantly higher inventory availability (15,303 units in stock versus 896 units for the discontinued variant).

Selection of the CD4521BE eliminates obsolescence risk while maintaining full functional and mechanical compatibility. Both parts satisfy ROHS3 and REACH compliance requirements for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the CD4521BE replace the CD4521BEG4 in existing designs?

A: Yes. The CD4521BE is a direct functional equivalent with identical electrical characteristics, operating ranges, and 16-DIP package configuration. No circuit modifications are required.

Q: Are there differences in pin configuration between these parts?

A: No. Both the CD4521BEG4 and CD4521BE use the same 16-DIP package with identical pin assignments and functionality.

Q: What is the significance of the "G4" suffix in CD4521BEG4?

A: The "G4" suffix indicates the specific packaging and date code variant. The CD4521BE represents the current active production variant without this suffix designation.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, suitable for applications requiring these certifications.

Q: Is the CD4521BE available in the same through-hole package?

A: Yes. The CD4521BE is supplied in 16-PDIP through-hole packaging identical to the CD4521BEG4, with standard 0.300" (7.62mm) DIP spacing.

Q: What is the primary reason to transition from CD4521BEG4 to CD4521BE?

A: The CD4521BEG4 is discontinued at DiGi Electronics. The CD4521BE provides equivalent functionality with active product status and superior availability for new designs and production requirements.