CD74HC123M Equivalent & Substitute Parts

Part Overview

The CD74HC123M is a monostable multivibrator logic integrated circuit manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This device features two independent circuits with a 25 ns propagation delay and operates across a 2 V to 6 V supply voltage range. The CD74HC123M is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD74HC123M

Texas InstrumentsIn Stock: 1385CD74HC123M Datasheet

Current PartRFQ

CD74HC123M96

Texas InstrumentsIn Stock: 50187CD74HC123M96 Datasheet

DirectRFQ

74HC123D,653

Nexperia USA Inc.In Stock: 198674HC123D,653 Datasheet

MFR RecommendedRFQ

74HC123D-Q100,118

Nexperia USA Inc.In Stock: 320374HC123D-Q100,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74HC123M is determined by the following critical parameters:

• Logic Function: Monostable multivibrator with 2 independent circuits
• Package Compatibility: 16-SOIC surface mount form factor
• Electrical Specifications: Supply voltage range (2 V ~ 6 V), output current (5.2 mA), and propagation delay tolerance
• Compliance Requirements: RoHS3 compliance and MSL rating

The substitute parts listed maintain the same base product number (74HC123) and core electrical characteristics. Variations in propagation delay (25 ns vs. 65 ns) and operating temperature ranges are noted as design considerations. All substitutes are housed in compatible 16-SOIC packages and meet the same RoHS3 compliance standard.

Parameter Comparison

Engineering Selection Recommendations

CD74HC123M96 (Texas Instruments): This direct substitute maintains identical propagation delay (25 ns) and operating temperature range (-55°C ~ 125°C) as the original CD74HC123M. The part is currently in active production status with high inventory availability (50,100 pcs). Packaging is available in Cut Tape and Digi-Reel formats. This substitute is the preferred choice for applications requiring the original timing specifications.

74HC123D,653 (Nexperia USA Inc.): This substitute shares the same base product number and package form factor but features a longer propagation delay of 65 ns and a narrower operating temperature range (-40°C ~ 125°C). The part is in active production with 1,900 pcs available. This option is suitable for applications where the extended propagation delay does not impact circuit performance and the reduced temperature range meets design requirements.

74HC123D-Q100,118 (Nexperia USA Inc.): This automotive-grade variant (AEC-Q100 qualified) provides the same electrical characteristics as 74HC123D,653 with 65 ns propagation delay and -40°C ~ 125°C operating temperature. It is supplied in Tape & Reel packaging with 3,126 pcs in stock. This part is specified for automotive applications requiring AEC-Q100 qualification.

All substitutes maintain RoHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can CD74HC123M96 be used as a direct replacement for CD74HC123M?

A: Yes. CD74HC123M96 is a direct substitute with identical propagation delay (25 ns), operating temperature range (-55°C ~ 125°C), and all electrical specifications. Both are manufactured by Texas Instruments in the same 16-SOIC package.

Q: What is the impact of using 74HC123D,653 with 65 ns propagation delay instead of the original 25 ns?

A: The 65 ns propagation delay is 2.6 times longer than the original specification. This affects circuit timing and pulse generation characteristics. Use this substitute only if your application timing tolerances accommodate the extended delay.

Q: What is the difference between 74HC123D,653 and 74HC123D-Q100,118?

A: Both parts have identical electrical specifications (65 ns propagation delay, -40°C ~ 125°C operating range). The primary difference is that 74HC123D-Q100,118 carries AEC-Q100 automotive qualification and is supplied in Tape & Reel packaging, while 74HC123D,653 is supplied in Cut Tape format. Select the automotive variant only if AEC-Q100 qualification is required.

Q: Are all substitutes compatible with the original 16-SOIC package footprint?

A: Yes. All substitute parts use the 16-SOIC (0.154", 3.90mm Width) package, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: Do all substitutes meet RoHS3 compliance?

A: Yes. All listed substitutes are RoHS3 compliant with MSL Level 1 rating, matching the original CD74HC123M specifications.

Q: Which substitute should I select for new designs?

A: For timing-critical applications, select CD74HC123M96 to maintain the original 25 ns propagation delay. For applications with relaxed timing requirements and automotive qualification needs, select 74HC123D-Q100,118.