MM74HC08N AND Gate IC Equivalent & Substitute Parts

Part Overview

The MM74HC08N is a 4-channel 2-input AND gate logic IC manufactured by onsemi in 14-MDIP packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MM74HC08N operates within the 74HC logic family standard, which defines compatible electrical and mechanical parameters across multiple manufacturers. Substitute parts must maintain functional equivalence through matching logic configuration, electrical specifications, and physical packaging.

Substiute Parts

MM74HC08N

onsemiIn Stock: 24632MM74HC08N Datasheet

Current PartRFQ

CD74HC08E

Texas InstrumentsIn Stock: 1412CD74HC08E Datasheet

DirectRFQ

SN74HC08N

Texas InstrumentsIn Stock: 1209SN74HC08N Datasheet

DirectRFQ

TC74HC08APF

Toshiba Semiconductor and StorageIn Stock: 4318TC74HC08APF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC08N is determined by strict adherence to the following criteria:

Primary Substitution Criteria:

• Logic configuration: 4-channel AND gate with 2 inputs per channel
• Supply voltage range: 2V ~ 6V minimum
• Package type: 14-DIP form factor (0.300", 7.62mm pitch)
• Mounting type: Through Hole
• Base product number: 74HC08 series

Electrical Parameter Compatibility:

• Quiescent current: 2 µA maximum (or lower)
• Output current capability: 5.2mA minimum for both high and low states
• Input logic levels: Low 0.5V ~ 1.8V, High 1.5V ~ 4.2V
• Propagation delay: 20ns maximum @ 6V, 50pF load

Mechanical Compatibility: All substitute parts must use identical 14-DIP through-hole packaging to ensure direct PCB footprint compatibility without layout modifications.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

CD74HC08E and SN74HC08N are direct substitutes for the MM74HC08N. Both are manufactured by Texas Instruments and maintain identical electrical specifications within the specified operating ranges. Both parts are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The CD74HC08E offers extended operating temperature range (-55°C ~ 125°C) compared to the original part, providing additional thermal margin for demanding applications. The SN74HC08N maintains the original temperature specification (-40°C ~ 85°C) and represents the closest functional equivalent.

Alternative Substitute (Performance Enhancement):

TC74HC08APF manufactured by Toshiba Semiconductor is a compatible substitute with measurable performance advantages. This part delivers faster propagation delay (13ns versus 20ns) and lower quiescent current (1 µA versus 2 µA), resulting in improved speed and reduced power consumption. All electrical and mechanical parameters remain within acceptable substitution criteria. TC74HC08APF is ROHS3 compliant and actively produced.

Selection Basis:

All three substitute parts satisfy the mandatory substitution criteria: identical logic configuration, compatible voltage and current specifications, matching 14-DIP through-hole packaging, and equivalent input/output logic levels. Product status and compliance certifications confirm ongoing manufacturability and regulatory compliance for all active alternatives.

Frequently Asked Questions (FAQ)

Q: Can MM74HC08N be directly replaced with CD74HC08E on existing PCBs?

A: Yes. Both parts use identical 14-DIP through-hole packaging with matching pinout and electrical specifications. No PCB modifications are required. The CD74HC08E is a direct pin-for-pin replacement.

Q: What is the difference between CD74HC08E and SN74HC08N?

A: Both are functionally equivalent AND gate ICs with identical logic configuration and electrical parameters. The primary difference is manufacturer (Texas Instruments for both) and packaging designation. CD74HC08E is supplied in tube packaging, while SN74HC08N is also tube packaged. Propagation delay differs slightly: CD74HC08E at 15ns versus SN74HC08N at 17ns, both within acceptable limits.

Q: Why is TC74HC08APF listed as a similar substitute rather than direct?

A: TC74HC08APF is manufactured by Toshiba Semiconductor rather than Texas Instruments. While all electrical and mechanical parameters are compatible, the different manufacturer source is noted for procurement tracking. The part offers performance improvements (faster speed, lower power) and is fully compatible for substitution.

Q: Does the extended temperature range of CD74HC08E (-55°C ~ 125°C) affect compatibility?

A: No. Extended temperature range represents an enhancement, not a limitation. If the original design operates within -40°C ~ 85°C, the CD74HC08E will function identically within that range. The extended range provides additional margin for future applications.

Q: Are all substitute parts RoHS compliant?

A: CD74HC08E, SN74HC08N, and TC74HC08APF are all ROHS3 compliant. The original MM74HC08N RoHS status was not specified in available documentation. All substitute parts meet current environmental and regulatory requirements.

Q: Can these parts be used interchangeably in new designs?

A: Yes. All substitute parts meet the 74HC08 standard specification and are suitable for new designs. Selection should be based on availability, lead time, and performance requirements. TC74HC08APF offers performance advantages if speed and power consumption are design considerations.

Q: What is the REACH compliance status for all parts?

A: All parts, including the original MM74HC08N and all substitutes, are listed as REACH Unaffected, indicating compliance with REACH regulations.