74HCT123D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT123D,652 is a monostable multivibrator logic integrated circuit manufactured by Nexperia USA Inc. in a 16-SOIC surface mount package. This component features two independent circuits with Schmitt trigger input capability and a propagation delay of 77 ns. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Substiute Parts

74HCT123D,652

Nexperia USA Inc.In Stock: 88474HCT123D,652 Datasheet

Current PartRFQ

CD74HCT123M96

Texas InstrumentsIn Stock: 15478CD74HCT123M96 Datasheet

SimilarRFQ

CD74HCT123MT

Texas InstrumentsIn Stock: 2308CD74HCT123MT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HCT123D,652 is determined by the following critical parameters:

• Logic Type & Circuit Count: Must be monostable multivibrator with 2 independent circuits
• Package Compatibility: Must use 16-SOIC (0.154", 3.90 mm Width) surface mount package
• Electrical Specifications: Supply voltage range 4.5 V ~ 5.5 V; output current 4 mA (high and low)
• Base Product Series: 74HCT logic family designation
• Compliance Requirements: ROHS3 compliant; REACH unaffected status

The identified substitute parts CD74HCT123M96 and CD74HCT123MT, both manufactured by Texas Instruments, share the same base product number (74HCT123) and package configuration. Both substitutes maintain electrical compatibility within the specified supply voltage and output current parameters. Differences in propagation delay (25 ns versus 77 ns) and operating temperature range represent performance variations within the 74HCT123 product family.

Parameter Comparison

Engineering Selection Recommendations

Both CD74HCT123M96 and CD74HCT123MT are functionally equivalent substitutes for the 74HCT123D,652 based on package compatibility, electrical specifications, and compliance certifications. All three parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity ratings.

The Texas Instruments substitutes offer improved propagation delay performance (25 ns versus 77 ns) and extended lower operating temperature range (-55°C versus -40°C). The absence of Schmitt trigger input on the substitute parts does not affect functional compatibility for standard monostable multivibrator applications within the 74HCT logic family.

Selection between CD74HCT123M96 and CD74HCT123MT should be based on inventory availability and packaging format requirements (Cut Tape vs. Digi-Reel). Both parts are suitable for direct substitution in applications currently using the 74HCT123D,652.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT123M96 and CD74HCT123MT be used interchangeably with 74HCT123D,652?

A: Yes. Both Texas Instruments parts share identical package configuration (16-SOIC), supply voltage range (4.5 V ~ 5.5 V), output current specifications (4 mA), and circuit count (2 independent circuits). All three parts are ROHS3 compliant with MSL 1 ratings.

Q: What is the significance of the Schmitt trigger input difference?

A: The 74HCT123D,652 includes Schmitt trigger input capability, while the substitute parts do not. This difference does not affect substitution eligibility for standard monostable multivibrator circuit applications within the 74HCT logic family.

Q: How do propagation delay differences affect substitution?

A: The substitute parts (CD74HCT123M96 and CD74HCT123MT) feature 25 ns propagation delay compared to 77 ns for the original part. This represents improved performance and does not create compatibility issues in applications designed for the original specification.

Q: Are there package compatibility concerns?

A: No. All three parts use the 16-SOIC (0.154", 3.90 mm Width) surface mount package with identical pinout and footprint requirements.

Q: What is the difference between CD74HCT123M96 and CD74HCT123MT?

A: Both parts are functionally identical. The difference lies in packaging format: CD74HCT123M96 is supplied in Cut Tape (CT) & Digi-Reel format, while CD74HCT123MT is also available in Cut Tape & Digi-Reel format. Selection depends on procurement and assembly requirements.