MM74C08N Equivalent & Substitute Parts

Part Overview

The MM74C08N is a 4-channel AND gate logic IC manufactured by onsemi in 14-MDIP packaging. This component implements four independent 2-input AND gates in a single 14-pin dual inline package. The MM74C08N operates across a wide supply voltage range of 3V to 15V and is rated for operating temperatures from -55°C to 125°C.

The MM74C08N is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this logic gate configuration.

Substiute Parts

MM74C08N

onsemiIn Stock: 44682MM74C08N Datasheet

Current PartRFQ

CD4081BE

Texas InstrumentsIn Stock: 1470CD4081BE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The CD4081BE qualifies as a direct substitute for the MM74C08N based on the following critical parameters:

• Logic Function: Both parts implement 4-channel 2-input AND gate logic
• Package Compatibility: Both use 14-DIP (0.300", 7.62mm) through-hole packaging, enabling direct socket replacement
• Supply Voltage Range: CD4081BE operates at 3V ~ 18V, which encompasses the MM74C08N requirement of 3V ~ 15V
• Operating Temperature Range: Both rated for -55°C to 125°C
• Output Current Capability: CD4081BE provides 3.4mA output current, which is lower than the MM74C08N's 8mA but remains functional in standard logic applications
• Propagation Delay: CD4081BE specifies 90ns @ 15V, 50pF, which is within acceptable timing margins for most applications using the MM74C08N

Parameter Comparison

Engineering Selection Recommendations

The CD4081BE is an active product from Texas Instruments and represents the primary substitute for the obsolete MM74C08N. Both components share identical logic function, pin configuration, and package form factor, enabling direct replacement in through-hole PCB applications.

The CD4081BE provides extended supply voltage range (3V ~ 18V versus 3V ~ 15V) and maintains full compatibility across the specified operating temperature range. The CD4081BE carries ROHS3 compliance certification, supporting modern manufacturing and environmental standards.

Output current capability differs between the two parts: the MM74C08N provides 8mA while the CD4081BE provides 3.4mA. Applications requiring higher output current drive capability should evaluate load impedance and fan-out requirements against the CD4081BE specification.

Both components are classified as REACH Unaffected and carry EAR99 ECCN designation.

Frequently Asked Questions (FAQ)

Q: Can the CD4081BE replace the MM74C08N in existing designs?

A: Yes. Both parts implement identical 4-channel 2-input AND gate logic in 14-DIP packaging. Pin-for-pin compatibility and matching operating temperature ranges support direct substitution in through-hole applications.

Q: What are the key differences between these parts?

A: The primary differences are product status (MM74C08N is obsolete; CD4081BE is active), output current capability (8mA versus 3.4mA), and supply voltage range (3V ~ 15V versus 3V ~ 18V). The CD4081BE also includes ROHS3 compliance.

Q: Does the lower output current of the CD4081BE affect compatibility?

A: Output current capability depends on application load requirements. Standard logic gate applications typically operate within the 3.4mA specification of the CD4081BE. Applications with high fan-out or driving heavy loads should verify load impedance against the CD4081BE output current rating.

Q: Are there packaging differences between these parts?

A: No. Both parts use 14-DIP (0.300", 7.62mm) through-hole packaging with identical pin assignments, enabling direct socket replacement without PCB modification.

Q: What is the propagation delay difference?

A: The MM74C08N specifies 70ns @ 10V, 50pF while the CD4081BE specifies 90ns @ 15V, 50pF. The CD4081BE measurement is taken at higher voltage and represents acceptable timing performance for standard logic applications.

Q: Are compliance certifications equivalent?

A: Both parts are REACH Unaffected and carry EAR99 ECCN designation. The CD4081BE includes ROHS3 compliance, supporting modern manufacturing requirements. The MM74C08N carries MSL 1 (Unlimited) moisture sensitivity rating.