MC14528BFG Equivalent & Substitute Parts

Part Overview

The MC14528BFG is a monostable multivibrator logic IC manufactured by onsemi in the 4000B series. This component features dual independent circuits with 90 ns propagation delay and operates across a wide supply voltage range of 3 V to 18 V. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain functional equivalence in monostable multivibrator operation while accommodating variations in propagation delay, output current, and supply voltage specifications.

Substiute Parts

MC14528BFG

onsemiIn Stock: 854MC14528BFG Datasheet

Current PartRFQ

MC14528BDR2G

onsemiIn Stock: 2505MC14528BDR2G Datasheet

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CD14538BNSR

Texas InstrumentsIn Stock: 1693CD14538BNSR Datasheet

DirectRFQ

HEC4528BT,112

Nexperia USA Inc.In Stock: 2075HEC4528BT,112 Datasheet

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HEC4528BT,118

NXP USA Inc.In Stock: 1047HEC4528BT,118 Datasheet

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HEF4528BT,653

Nexperia USA Inc.In Stock: 6640HEF4528BT,653 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MC14528BFG is determined by the following critical parameters: logic type (monostable multivibrator), dual independent circuits, surface mount packaging in 16-SOIC form factor, and supply voltage compatibility. Acceptable substitutes must maintain the same functional architecture and pin configuration. Variations in propagation delay (within practical timing tolerances), output current ratings, and operating temperature ranges are permissible when the application does not require exact timing specifications. Schmitt trigger input presence is noted as a differentiating feature but does not preclude substitution in applications where standard logic inputs are sufficient.

Parameter Comparison

Engineering Selection Recommendations

MC14528BDR2G is the primary substitute for MC14528BFG. Both parts are manufactured by onsemi, share identical propagation delay (90 ns) and output current specifications (8.8 mA), and operate across the same supply voltage range (3 V ~ 18 V). MC14528BDR2G is currently in active production status with ROHS3 compliance and superior moisture sensitivity rating (MSL 1), making it the preferred choice for new designs and production continuity.

CD14538BNSR from Texas Instruments is a functional equivalent with 100 ns propagation delay and includes Schmitt trigger input capability. This part maintains the same supply voltage range and operating temperature specifications as the original MC14528BFG. CD14538BNSR is ROHS3 compliant and actively produced, suitable for applications where the additional 10 ns propagation delay is acceptable and Schmitt trigger input provides design benefits.

HEF4528BT,653 from Nexperia USA Inc. is an active substitute with 35 ns propagation delay, offering faster operation than the original part. This device operates within the 4.5 V ~ 15.5 V supply range, which is narrower than the MC14528BFG but covers standard industrial and consumer voltage specifications. HEF4528BT,653 is ROHS3 compliant with MSL 1 rating and represents a performance upgrade option.

HEC4528BT,118 from NXP USA Inc. provides 35 ns propagation delay in an active product status with ROHS3 compliance. Supply voltage range is 4.5 V ~ 15.5 V. This part is suitable for applications operating within standard voltage ranges where faster propagation delay is beneficial.

HEC4528BT,112 from Nexperia USA Inc. is classified as obsolete and RoHS non-compliant, making it unsuitable for new designs or applications requiring regulatory compliance. This part is not recommended as a substitute.

Frequently Asked Questions (FAQ)

Q: Can MC14528BDR2G directly replace MC14528BFG in existing designs?

A: Yes. MC14528BDR2G is functionally equivalent with identical propagation delay (90 ns), output current (8.8 mA), and supply voltage range (3 V ~ 18 V). The primary difference is package width (3.90mm vs. 5.30mm), which may require PCB layout adjustment. MC14528BDR2G is actively produced and ROHS3 compliant.

Q: What is the impact of propagation delay differences in substitute parts?

A: Propagation delay variations (35 ns to 100 ns) affect timing-critical applications. HEF4528BT,653 and HEC4528BT,118 offer faster operation (35 ns), while CD14538BNSR introduces a 10 ns increase (100 ns). Verify that timing margins in your application accommodate these variations before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: MC14528BDR2G, CD14538BNSR, HEC4528BT,118, and HEF4528BT,653 are ROHS3 compliant. HEC4528BT,112 is RoHS non-compliant and should not be used in applications requiring regulatory compliance.

Q: What is the significance of Schmitt trigger input in CD14538BNSR?

A: CD14538BNSR includes Schmitt trigger input capability, which provides hysteresis and improved noise immunity compared to standard logic inputs. This feature is beneficial in noisy environments but is not required for functional substitution in applications using standard logic input levels.

Q: How do moisture sensitivity levels affect component handling?

A: MC14528BFG has MSL 3 (168 hours), requiring more stringent moisture control during storage and assembly. Substitute parts with MSL 1 (unlimited) offer superior moisture tolerance and reduced risk of moisture-induced failures during manufacturing and field deployment.

Q: Can I use HEF4528BT,653 in applications requiring the full 3 V ~ 18 V supply range?

A: No. HEF4528BT,653 operates within 4.5 V ~ 15.5 V. If your application requires operation below 4.5 V or above 15.5 V, use MC14528BDR2G or CD14538BNSR, which support the full 3 V ~ 18 V range.

Q: What packaging considerations apply to substitution?

A: MC14528BFG uses 16-SOIC with 5.30mm width. MC14528BDR2G, HEC4528BT,112, HEC4528BT,118, and HEF4528BT,653 use 16-SOIC with 3.90mm width. CD14538BNSR matches the original 5.30mm width. Verify PCB footprint compatibility before substitution, as narrower packages may not fit existing layouts without modification.