CD74HC123PW Equivalent & Substitute Parts

Part Overview

The CD74HC123PW is a monostable multivibrator logic IC manufactured by Texas Instruments, housed in a 16-TSSOP surface mount package. This component features two independent circuits with a 25 ns propagation delay and operates across a 2 V to 6 V supply voltage range. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

CD74HC123PW

Texas InstrumentsIn Stock: 1253CD74HC123PW Datasheet

Current PartRFQ

CD74HC123PWR

Texas InstrumentsIn Stock: 50164CD74HC123PWR Datasheet

DirectRFQ

74HC123PW,112

Nexperia USA Inc.In Stock: 94074HC123PW,112 Datasheet

MFR RecommendedRFQ

74HC123PW,118

Nexperia USA Inc.In Stock: 890874HC123PW,118 Datasheet

MFR RecommendedRFQ

74HC123PW-Q100,118

NXP USA Inc.In Stock: 856974HC123PW-Q100,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HC123PW is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

• Base product number: 74HC123
• Package type: 16-TSSOP surface mount
• Independent circuits: 2
• Output current capability: 5.2 mA (high and low)
• Supply voltage range: 2 V ~ 6 V
• Logic type: Monostable multivibrator

Acceptable Variation:

• Propagation delay: The main part specifies 25 ns. Substitute parts with 65 ns propagation delay remain functionally compatible within the 74HC123 logic family, as timing performance is application-dependent and not a disqualifying parameter for the base product number.
• Operating temperature range: Substitutes with -40°C ~ 125°C are acceptable alternatives to the -55°C ~ 125°C specification.
• Packaging format: Cut Tape (CT), Digi-Reel, Tape & Reel (TR), and Bulk packaging formats are interchangeable for component selection purposes.

All identified substitutes maintain identical electrical characteristics, package footprint, and pin configuration, ensuring direct replacement capability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CD74HC123PWR

The CD74HC123PWR is the direct equivalent manufactured by Texas Instruments. It maintains identical electrical specifications including 25 ns propagation delay and -55°C ~ 125°C operating temperature range. Product status is Active with 50,084 units in stock, ensuring supply continuity. This part is the preferred selection for direct replacement applications.

Secondary Substitutes: 74HC123PW,118 and 74HC123PW-Q100,118

Both Nexperia/NXP parts are Active products with adequate inventory (8,886 and 8,488 units respectively). These substitutes feature 65 ns propagation delay and -40°C ~ 125°C operating temperature range. The 74HC123PW-Q100,118 variant includes AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade components.

Tertiary Substitute: 74HC123PW,112

This Nexperia part is classified as Obsolete with limited inventory (862 units). While electrically compatible, its obsolete status makes it unsuitable for new designs or long-term production requirements.

Compliance Considerations:

All substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. The 74HC123PW-Q100,118 variant provides additional automotive qualification for applications requiring AEC-Q100 certification.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC123PWR directly replace the CD74HC123PW?

A: Yes. The CD74HC123PWR is manufactured by Texas Instruments and maintains identical electrical specifications, package configuration, and operating parameters. It is the direct equivalent for replacement applications.

Q: What is the difference between the 25 ns and 65 ns propagation delay variants?

A: Propagation delay specifies the time required for the output to respond to an input change. The main part (CD74HC123PW) features 25 ns delay, while Nexperia/NXP substitutes feature 65 ns delay. Both are within the 74HC123 logic family specification and remain functionally compatible. Selection depends on application timing requirements.

Q: Are the Nexperia 74HC123PW,112 and 74HC123PW,118 parts interchangeable?

A: Yes, electrically and mechanically. Both are Nexperia-manufactured 74HC123 monostable multivibrators in 16-TSSOP packages with identical output current and supply voltage specifications. The primary difference is product status: 74HC123PW,112 is Obsolete, while 74HC123PW,118 is Active.

Q: What does the AEC-Q100 qualification on the 74HC123PW-Q100,118 indicate?

A: AEC-Q100 is an automotive qualification standard. The 74HC123PW-Q100,118 variant meets automotive-grade reliability and testing requirements, making it suitable for automotive applications where such certification is mandated.

Q: Can I use a substitute with a -40°C ~ 125°C operating temperature range instead of -55°C ~ 125°C?

A: Substitution is valid if your application operates within the -40°C ~ 125°C range. If your design requires operation below -40°C, the original CD74HC123PW or CD74HC123PWR with -55°C ~ 125°C rating is required.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All identified substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes and environmental requirements.

Q: What packaging formats are available for these substitutes?

A: CD74HC123PWR is available in Cut Tape (CT) and Digi-Reel format. The 74HC123PW,118 is supplied in Tape & Reel (TR) format. The 74HC123PW-Q100,118 is available in Bulk packaging. All formats contain identical components; selection depends on procurement and assembly requirements.