MC14528BF Equivalent & Substitute Parts

Part Overview

The MC14528BF is a monostable multivibrator IC manufactured by onsemi, designed for logic applications requiring precision timing and pulse generation. This device features two independent circuits with a 90 ns propagation delay and operates across a wide supply voltage range of 3 V to 18 V. The MC14528BF is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

MC14528BF

onsemiIn Stock: 913MC14528BF Datasheet

Current PartRFQ

CD14538BNSR

Texas InstrumentsIn Stock: 1693CD14538BNSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MC14528BF is determined by the following critical parameters:

• Logic Type & Circuit Count: Both the main part and substitute must be monostable multivibrators with 2 independent circuits
• Package Compatibility: 16-SOIC surface mount package with 0.209" width (5.30mm) ensures mechanical and electrical pin compatibility
• Supply Voltage Range: 3 V ~ 18 V operating range must be maintained
• Operating Temperature: -55°C ~ 125°C range must be supported
• Propagation Delay: Timing specifications within acceptable tolerance (90 ns to 100 ns)
• Output Current Capability: Current drive specifications must meet or exceed application requirements

The CD14538BNSR from Texas Instruments satisfies all substitution criteria as a functionally equivalent monostable multivibrator in the same package configuration.

Parameter Comparison

Engineering Selection Recommendations

The CD14538BNSR is the qualified substitute for the MC14528BF based on the following engineering criteria:

Functional Equivalence: Both devices are dual monostable multivibrators with identical circuit counts, supply voltage ranges, and operating temperature specifications. The 10 ns difference in propagation delay (90 ns vs. 100 ns) falls within acceptable timing tolerances for most monostable multivibrator applications.

Package Compatibility: Identical 16-SOIC surface mount packaging ensures direct PCB layout compatibility without redesign requirements.

Product Status & Availability: The CD14538BNSR is active production status with higher inventory availability (1618 Pcs), providing superior supply chain reliability compared to the obsolete MC14528BF.

Compliance Advantages: The CD14538BNSR is ROHS3 compliant with MSL 1 rating, offering improved environmental compliance and extended moisture handling capabilities compared to the RoHS non-compliant MC14528BF with MSL 3 rating.

Output Current Consideration: The CD14538BNSR provides 6.8 mA output current versus 8.8 mA for the MC14528BF. Applications requiring the full 8.8 mA output drive must evaluate whether 6.8 mA meets circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the CD14538BNSR directly replace the MC14528BF without PCB modifications?

A: Yes. Both devices use identical 16-SOIC packaging with matching pin configurations, enabling direct substitution without PCB layout changes.

Q: What is the significance of the 10 ns propagation delay difference?

A: The MC14528BF specifies 90 ns while the CD14538BNSR specifies 100 ns. This 10 ns difference is typical between manufacturers and generally acceptable for monostable multivibrator applications. Circuit timing requirements must be evaluated against application specifications.

Q: Does the Schmitt Trigger Input on the CD14538BNSR affect compatibility?

A: The CD14538BNSR includes Schmitt Trigger input functionality while the MC14528BF does not. This additional feature provides improved noise immunity and does not prevent substitution. Existing circuit designs will function with the enhanced input characteristics.

Q: Why is the output current lower on the CD14538BNSR?

A: The CD14538BNSR provides 6.8 mA output current compared to 8.8 mA on the MC14528BF. Applications must verify that 6.8 mA meets load drive requirements. If higher current is essential, alternative parts must be evaluated.

Q: What are the moisture handling differences between these parts?

A: The MC14528BF has MSL 3 rating (168 hours maximum floor life), while the CD14538BNSR has MSL 1 rating (unlimited floor life). The CD14538BNSR offers superior moisture tolerance and extended handling flexibility in manufacturing environments.

Q: Is the CD14538BNSR suitable for RoHS-compliant applications?

A: Yes. The CD14538BNSR is ROHS3 compliant, making it suitable for applications requiring RoHS compliance. The MC14528BF is RoHS non-compliant and unsuitable for such applications.