MM74HC154WM Equivalent & Substitute Parts

Part Overview

The MM74HC154WM is a 1 x 4:16 decoder/demultiplexer logic IC manufactured by onsemi in a 24-SOP surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The decoder function enables conversion of 4-bit binary input to 16 individual output lines, commonly used in address decoding and multiplexing applications.

Substiute Parts

MM74HC154WM

onsemiIn Stock: 1398MM74HC154WM Datasheet

Current PartRFQ

CD74HC154M

Texas InstrumentsIn Stock: 1485CD74HC154M Datasheet

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CD74HC154M96

Texas InstrumentsIn Stock: 26048CD74HC154M96 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC154WM is determined by strict equivalence across the following parameters:

• Circuit configuration: 1 x 4:16 decoder function
• Output current specifications: 5.2mA high and low
• Supply voltage range: 2V to 6V minimum compatibility
• Package type: 24-SOIC form factor
• Mounting type: Surface mount
• Moisture sensitivity: MSL 1 classification

Two substitute parts meet these criteria. The CD74HC154M (Texas Instruments, Last Time Buy status) provides direct functional equivalence with expanded operating temperature range (-55°C to 125°C). The CD74HC154M96 (Texas Instruments, Active status) is an upgrade option offering the same electrical and mechanical specifications with current production availability and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production applications, CD74HC154M96 is the primary selection. This part maintains full electrical and mechanical compatibility with the MM74HC154WM while offering Active product status, ensuring long-term availability and supply chain stability. RoHS3 compliance and expanded operating temperature range (-55°C to 125°C) provide additional design margin for demanding environments.

CD74HC154M serves as a secondary option where Last Time Buy inventory remains available. This part provides identical electrical performance and package compatibility but with limited future availability due to its product status classification.

Both substitute parts are pin-compatible and functionally equivalent within the specified parameter envelope, enabling direct replacement in existing PCB designs without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can CD74HC154M96 replace MM74HC154WM in existing designs? A: Yes. Both parts share identical circuit configuration (1 x 4:16), output current specifications (5.2mA), supply voltage range (2V to 6V), and 24-SOIC package dimensions. Pin compatibility is maintained, allowing direct PCB substitution.

Q: What is the difference between CD74HC154M and CD74HC154M96? A: Both parts are electrically and mechanically identical. The primary difference is product status: CD74HC154M is Last Time Buy, while CD74HC154M96 is Active production. CD74HC154M96 is recommended for new designs due to ongoing availability.

Q: Are there temperature range considerations for substitution? A: The MM74HC154WM operates from -40°C to 85°C. Both substitute parts extend this range to -55°C to 125°C, providing additional thermal margin. This expanded range does not create compatibility issues; it represents an improvement for applications requiring wider temperature operation.

Q: Is the 24-SOIC package identical across all three parts? A: Yes. All three parts use 24-SOIC (0.295", 7.50mm Width) surface mount packaging with identical pin assignments and mechanical dimensions.

Q: What is the moisture sensitivity classification for these parts? A: All three parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are RoHS compliance certifications important for substitution? A: The substitute parts (CD74HC154M and CD74HC154M96) are ROHS3 compliant. This certification ensures compliance with current environmental regulations and is recommended for applications subject to RoHS requirements.