CD74HCT123MT Equivalent & Substitute Parts

Part Overview

The CD74HCT123MT is a monostable multivibrator logic IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This component features two independent circuits with a 25 ns propagation delay and operates across a 4.5 V to 5.5 V supply voltage range. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain identical electrical characteristics and package specifications to ensure direct compatibility in existing circuit designs.

Substiute Parts

CD74HCT123MT

Texas InstrumentsIn Stock: 2308CD74HCT123MT Datasheet

Current PartRFQ

CD74HCT123M96

Texas InstrumentsIn Stock: 15478CD74HCT123M96 Datasheet

DirectRFQ

74HCT123D,653

NXP SemiconductorsIn Stock: 3673574HCT123D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HCT123MT is determined by strict equivalence across the following critical parameters:

• Logic type and circuit configuration (monostable multivibrator with 2 independent circuits)
• Propagation delay (25 ns)
• Output current specifications (4 mA high and low)
• Supply voltage range (4.5 V ~ 5.5 V)
• Operating temperature range (-55°C ~ 125°C)
• Package type and pin configuration (16-SOIC)
• Base product number (74HCT123)
• Compliance certifications (ROHS3, REACH Unaffected)

All substitute parts listed below meet these requirements and are electrically and mechanically interchangeable with the CD74HCT123MT.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT123M96 serves as a direct Texas Instruments equivalent with identical electrical specifications and package configuration. This part is classified as obsolete, indicating limited future availability.

74HCT123D,653 is the manufacturer-recommended substitute from NXP Semiconductors. This part maintains the 74HCT123 base product number and is currently in active production status, providing superior long-term availability and supply chain stability. The part is REACH Unaffected and carries MSL 1 rating.

For new designs and ongoing production requiring maximum supply assurance, 74HCT123D,653 is the preferred selection. For legacy system maintenance where Texas Instruments sourcing is required, CD74HCT123M96 provides equivalent functionality.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT123M96 be used as a direct replacement for CD74HCT123MT?

A: Yes. Both parts share identical electrical specifications (25 ns propagation delay, 4 mA output current, 4.5 V ~ 5.5 V supply), operating temperature range (-55°C ~ 125°C), and 16-SOIC package configuration. Pin-for-pin compatibility is assured.

Q: What is the difference between CD74HCT123MT and 74HCT123D,653?

A: Both are monostable multivibrators with two independent circuits in 16-SOIC packages. CD74HCT123MT is a Texas Instruments product now discontinued at DiGi Electronics. 74HCT123D,653 is manufactured by NXP Semiconductors and maintains active production status. The NXP part is the manufacturer-recommended substitute.

Q: Are there package differences between these substitutes?

A: All three parts use 16-SOIC (0.154", 3.90 mm width) surface mount packages. Pin configuration and footprint are identical, enabling direct PCB-level substitution without layout modifications.

Q: What compliance certifications apply to these parts?

A: CD74HCT123MT and CD74HCT123M96 are ROHS3 Compliant with REACH Unaffected status. 74HCT123D,653 carries REACH Unaffected designation. All parts have MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Which substitute should be selected for new production?

A: 74HCT123D,653 is recommended for new production due to active product status and established supply chain availability. CD74HCT123M96 is suitable for legacy system maintenance where Texas Instruments sourcing is preferred, though availability is limited due to obsolete classification.