CD74HC423M96 Equivalent & Substitute Parts

Part Overview

The CD74HC423M96 is a monostable multivibrator logic IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The CD74HC423M96 operates across a 2V to 6V supply range with a 25ns propagation delay and features two independent circuits suitable for timing and pulse generation applications in digital logic systems.

Substiute Parts

CD74HC423M96

Texas InstrumentsIn Stock: 2197CD74HC423M96 Datasheet

Current PartRFQ

SN74AHC123ADR

Texas InstrumentsIn Stock: 5508SN74AHC123ADR Datasheet

MFR RecommendedRFQ

74HC423D,653

Nexperia USA Inc.In Stock: 326674HC423D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74HC423M96 is determined by the following critical parameters: logic type (monostable multivibrator), independent circuit count (2), package compatibility (16-SOIC surface mount), supply voltage range overlap, and propagation delay tolerance. The substitute parts identified maintain the core functional requirements while offering variations in speed performance and operating temperature ranges.

Two substitute parts are qualified:

SN74AHC123ADR (Texas Instruments): Maintains identical package, circuit count, and supply voltage compatibility. Offers improved propagation delay (7.5ns vs 25ns) and includes Schmitt trigger input capability. Operating temperature range is -40°C to 85°C. Product status is active.

74HC423D,653 (Nexperia USA Inc.): Maintains identical base product series (74HC423), package footprint, circuit count, and supply voltage range. Propagation delay is 20ns. Operating temperature range extends to -40°C to 125°C. Product status is active. Packaging format differs (Tape & Reel vs Cut Tape).

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with ROHS3 compliance and REACH unaffected status, providing long-term availability and regulatory alignment compared to the obsolete CD74HC423M96.

74HC423D,653 is the primary substitute when maximum compatibility is required. It maintains the identical 74HC423 base product series, supply voltage range (2V ~ 6V), output current specifications (5.2mA), and extended operating temperature range (-55°C to 125°C equivalent coverage). The 20ns propagation delay represents a 5ns improvement over the original 25ns specification. This part is suitable for designs where the original temperature range and voltage specifications are critical.

SN74AHC123ADR is the alternative substitute when improved speed performance is acceptable. The 7.5ns propagation delay provides significant timing margin improvement. The addition of Schmitt trigger input capability offers enhanced noise immunity. However, the reduced supply voltage upper limit (5.5V vs 6V) and narrower operating temperature range (-40°C to 85°C) must be evaluated against application requirements. This part is suitable for designs operating within standard industrial temperature and voltage ranges where faster response time is beneficial.

Frequently Asked Questions (FAQ)

Q: Can SN74AHC123ADR be used as a direct replacement for CD74HC423M96?

A: SN74AHC123ADR is functionally compatible for most applications. The 16-SOIC package footprint is identical, and both devices provide two independent monostable circuits. The primary considerations are the reduced maximum supply voltage (5.5V vs 6V) and narrower operating temperature range (-40°C to 85°C vs -55°C to 125°C). Applications operating at 6V supply or below -40°C or above 85°C require the 74HC423D,653 substitute instead.

Q: What is the difference between 74HC423D,653 and CD74HC423M96?

A: Both devices share the 74HC423 base product designation and are functionally equivalent monostable multivibrators. The 74HC423D,653 is manufactured by Nexperia USA Inc. and is currently active, whereas the CD74HC423M96 is obsolete. The propagation delay is 20ns versus 25ns. The packaging format differs (Tape & Reel vs Cut Tape), but the physical 16-SOIC footprint is identical. Supply voltage and output current specifications are identical.

Q: Are there temperature range limitations when substituting?

A: Yes. The CD74HC423M96 operates from -55°C to 125°C. The SN74AHC123ADR operates from -40°C to 85°C, which is narrower. The 74HC423D,653 operates from -40°C to 125°C, covering the upper temperature range of the original. Applications requiring operation below -40°C must use the original part or equivalent with extended low-temperature rating.

Q: Does the 16-SOIC package differ between these parts?

A: No. All three parts use the 16-SOIC package with 0.154" width (3.90mm). The physical footprint and pin configuration are identical, allowing direct PCB layout compatibility. The packaging format (Cut Tape vs Tape & Reel) affects procurement and handling but not electrical or mechanical compatibility.

Q: What is the significance of Schmitt trigger input in the SN74AHC123ADR?

A: The SN74AHC123ADR includes Schmitt trigger input capability, which provides hysteresis and improved noise immunity compared to standard logic inputs. This feature is beneficial in noisy environments but is not required for functional equivalence. Applications not requiring this feature can use either substitute part.

Q: Are all three parts RoHS3 compliant?

A: Yes. The CD74HC423M96, SN74AHC123ADR, and 74HC423D,653 are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.