MM74C32N Equivalent & Substitute Parts

Part Overview

The MM74C32N is a 4-channel OR gate logic IC manufactured by onsemi in 14-MDIP packaging. This component implements four independent 2-input OR gates in a single 14-pin dual inline package. The MM74C32N operates across a wide supply voltage range of 3V to 15V and is designed for through-hole mounting applications.

The MM74C32N is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term system maintenance where original parts are no longer readily available.

Substiute Parts

MM74C32N

onsemiIn Stock: 7162MM74C32N Datasheet

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CD4071BE

Texas InstrumentsIn Stock: 2233CD4071BE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MM74C32N is determined by the following critical parameters:

• Logic function: 4-channel OR gate with 2 inputs per channel
• Supply voltage range compatibility: Substitute must operate within or encompass the 3V to 15V range
• Output current capability: Substitute must meet or exceed 8mA output drive
• Package form factor: 14-DIP through-hole mounting with 0.300" (7.62mm) pitch
• Operating temperature range: -55°C to 125°C
• Pin configuration: Functional pin compatibility for direct replacement

The CD4071BE qualifies as a substitute based on these parameters. It maintains the same logic function, package form factor, and operating temperature range while providing compatible electrical characteristics within the specified voltage and current parameters.

Parameter Comparison

Engineering Selection Recommendations

The CD4071BE is an active production substitute for the MM74C32N. Both components share identical logic function, pin count, and package form factor, enabling direct replacement in through-hole applications.

The CD4071BE provides extended supply voltage range (3V to 18V versus 3V to 15V), ensuring compatibility across all operating conditions of the original design. Both parts maintain the same operating temperature range of -55°C to 125°C.

The CD4071BE is ROHS3 compliant and carries active product status, ensuring long-term availability and compliance with current regulatory requirements. The MM74C32N, classified as obsolete, presents supply chain risk for new production and maintenance applications.

Output current capability differs between the two parts: the MM74C32N provides 8mA per output, while the CD4071BE provides 3.4mA per output. Design verification is required to confirm that the reduced output drive of the CD4071BE is acceptable for the intended load conditions.

Frequently Asked Questions (FAQ)

Q: Can the CD4071BE directly replace the MM74C32N in existing designs?

A: Yes, the CD4071BE is pin-compatible and functionally equivalent. Both components are 4-channel OR gates in 14-DIP packaging with identical pin assignments. Direct socket replacement is possible without PCB modification.

Q: What are the key differences between these parts?

A: The primary differences are output current capability (MM74C32N: 8mA versus CD4071BE: 3.4mA) and supply voltage range (MM74C32N: 3V-15V versus CD4071BE: 3V-18V). The CD4071BE has slightly higher propagation delay (90ns versus 70ns). The CD4071BE is an active product with ROHS3 compliance, while the MM74C32N is obsolete.

Q: Is the reduced output current of the CD4071BE a concern?

A: The reduced output current (3.4mA versus 8mA) must be evaluated against the specific load impedance and fan-out requirements of your application. If the original design operates at or near the 8mA limit, alternative parts with higher output drive may be necessary.

Q: Are there any compliance or regulatory differences?

A: The CD4071BE is ROHS3 compliant and carries active product status. The MM74C32N is obsolete with unspecified RoHS status. For new designs and production applications, the CD4071BE meets current regulatory requirements.

Q: What is the impact of the extended voltage range in the CD4071BE?

A: The CD4071BE operates up to 18V supply, compared to 15V for the MM74C32N. This extended range provides additional design margin and compatibility with higher voltage systems. The original 3V to 15V operating window of the MM74C32N is fully contained within the CD4071BE range.