MM74HC154WMX Equivalent & Substitute Parts

Part Overview

The MM74HC154WMX is a 1 x 4:16 decoder/demultiplexer logic IC manufactured by onsemi in 24-SOP surface mount packaging. This part is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The decoder function converts a 4-bit binary input into one of 16 active outputs, serving as a core component in address decoding and multiplexing applications.

Key Parameters

Parameter	Value
Decoder Configuration	1 x 4:16
Output Current (High/Low)	5.2mA / 5.2mA
Supply Voltage Range	2V to 6V
Operating Temperature Range	-40°C to 85°C
Package Type	24-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Supply Configuration	Single Supply

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC154WMX is determined by the following criteria:

Mandatory Matching Parameters:

Decoder circuit configuration: 1 x 4:16
Output current specifications: 5.2mA (both high and low)
Supply voltage range: 2V to 6V minimum
Package type: 24-SOIC form factor
Single supply operation

Acceptable Variations:

Operating temperature range may exceed the original specification
Product status may differ (active, last time buy, or obsolete)
Packaging format (cut tape, tube, digi-reel) does not affect electrical compatibility
RoHS compliance status does not affect substitution eligibility

Two qualified substitutes meet these criteria: CD74HC154M96 (Texas Instruments, active status, cut tape packaging) and CD74HC154M (Texas Instruments, last time buy status, tube packaging).

Parameter Comparison

Parameter	MM74HC154WMX (onsemi)	CD74HC154M96 (TI)	CD74HC154M (TI)
Decoder Configuration	1 x 4:16	1 x 4:16	1 x 4:16
Output Current High	5.2mA	5.2mA	5.2mA
Output Current Low	5.2mA	5.2mA	5.2mA
Supply Voltage Range	2V to 6V	2V to 6V	2V to 6V
Operating Temperature	-40°C to 85°C	-55°C to 125°C	-55°C to 125°C
Package / Case	24-SOIC (0.295", 7.50mm Width)	24-SOIC (0.295", 7.50mm Width)	24-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Supply Configuration	Single Supply	Single Supply	Single Supply
Product Status	Obsolete	Active	Last Time Buy
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

CD74HC154M96 (Texas Instruments) is the primary substitute for new designs. This part carries active product status, ensuring long-term availability and supply chain stability. It is supplied in cut tape and digi-reel packaging formats suitable for automated assembly. ROHS3 compliance satisfies modern environmental and regulatory requirements. The extended operating temperature range (-55°C to 125°C) provides margin beyond the original specification.

CD74HC154M (Texas Instruments) serves as a secondary option for applications where tube packaging is preferred or where existing inventory must be consumed. This part is designated last time buy, indicating limited future availability. It shares identical electrical specifications and ROHS3 compliance with CD74HC154M96 but should not be selected for new long-term production programs.

Both substitutes maintain full electrical and mechanical compatibility with the MM74HC154WMX within the specified parameter envelope.

Frequently Asked Questions (FAQ)

Q: Can CD74HC154M96 be used as a direct replacement for MM74HC154WMX in existing designs?

A: Yes. Both parts share identical decoder configuration (1 x 4:16), output current ratings (5.2mA), supply voltage range (2V to 6V), and 24-SOIC package dimensions. The extended operating temperature range of CD74HC154M96 does not create incompatibility.

Q: What is the difference between CD74HC154M96 and CD74HC154M?

A: Both parts are electrically identical. The primary difference is packaging format and product status. CD74HC154M96 is supplied in cut tape and digi-reel formats with active status. CD74HC154M is supplied in tube format with last time buy status. For new designs, CD74HC154M96 is recommended.

Q: Does the 24-SOIC package dimension (0.295", 7.50mm Width) remain consistent across all three parts?

A: Yes. All three parts—MM74HC154WMX, CD74HC154M96, and CD74HC154M—use the identical 24-SOIC package with 0.295" width and 7.50mm width specification. PCB footprints and assembly processes require no modification.

Q: Are there any compliance or certification differences between the original and substitute parts?

A: The MM74HC154WMX product status is listed as obsolete with no RoHS specification provided. Both Texas Instruments substitutes (CD74HC154M96 and CD74HC154M) are ROHS3 compliant, meeting current environmental standards. REACH status is unaffected across all three parts.

Q: What supply voltage range applies to all substitute parts?

A: All three parts operate within the 2V to 6V supply voltage range. This specification is identical and non-negotiable for substitution eligibility.

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