MM74HC594M 8-Bit Shift Register Equivalent & Substitute Parts

Part Overview

The MM74HC594M is an 8-bit shift register manufactured by onsemi, designed for serial-to-parallel data conversion applications. This component features push-pull output configuration and operates across a 2V to 6V supply voltage range with an operating temperature span of -40°C to 85°C. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.

Substiute Parts

MM74HC594M

onsemiIn Stock: 1963MM74HC594M Datasheet

Current PartRFQ

SN74HC594DR

Texas InstrumentsIn Stock: 3844SN74HC594DR Datasheet

DirectRFQ

SN74HC594DT

Texas InstrumentsIn Stock: 727SN74HC594DT Datasheet

DirectRFQ

74HC594D,112

Nexperia USA Inc.In Stock: 119274HC594D,112 Datasheet

SimilarRFQ

74HC594D,118

Nexperia USA Inc.In Stock: 2824374HC594D,118 Datasheet

SimilarRFQ

74HC594D-Q100,118

NXP USA Inc.In Stock: 243474HC594D-Q100,118 Datasheet

SimilarRFQ

74HC594S16-13

Diodes IncorporatedIn Stock: 5038774HC594S16-13 Datasheet

SimilarRFQ

SN74HC594DW

Texas InstrumentsIn Stock: 1925SN74HC594DW Datasheet

SimilarRFQ

SN74HC594DWR

Texas InstrumentsIn Stock: 3149SN74HC594DWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC594M is determined by strict alignment with the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Logic Type: Shift Register (8-bit, 1 element)
• Function: Serial to Parallel conversion capability
• Output Type: Push-Pull configuration
• Voltage Supply Range: 2V ~ 6V minimum compatibility
• Package / Case: 16-SOIC form factor
• Mounting Type: Surface Mount

Substitute parts are grouped into two categories based on parameter alignment:

Direct Substitutes maintain identical electrical specifications and package dimensions (0.154", 3.90mm Width), ensuring pin-for-pin compatibility without design modification.

Similar Substitutes share core functional parameters but may exhibit variations in operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C), package width dimensions (0.295", 7.50mm vs. 0.154", 3.90mm), or additional functional capabilities (Serial to Parallel and Serial modes). These parts require verification of thermal and spatial constraints within the target application.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Pin-for-Pin Compatible):

SN74HC594DR (Texas Instruments, Active status) is the primary recommended substitute. This part maintains identical electrical specifications and package dimensions to the MM74HC594M, with the advantage of active product status ensuring long-term availability and supply chain stability.

SN74HC594DT (Texas Instruments, Discontinued at DiGi Electronics) provides equivalent functionality but with reduced availability. This part is suitable only when supply constraints on SN74HC594DR exist.

Similar Substitutes (Functional Equivalents with Parameter Variations):

74HC594D,118 (Nexperia USA Inc., Active status) and 74HC594S16-13 (Diodes Incorporated, Active status) offer extended operating temperature range (-40°C ~ 125°C) and dual-mode functionality (Serial to Parallel and Serial modes). These parts are compatible within the MM74HC594M's thermal envelope but require PCB layout verification due to identical package footprint.

74HC594D,112 (Nexperia USA Inc., Obsolete status) provides similar extended temperature capability but with reduced availability.

74HC594D-Q100,118 (NXP USA Inc., Active status) includes automotive-grade qualification (AEC-Q100) and is suitable for applications requiring automotive compliance.

SN74HC594DW and SN74HC594DWR (Texas Instruments) feature wider package dimensions (0.295", 7.50mm vs. 0.154", 3.90mm) and require PCB redesign for footprint accommodation. SN74HC594DWR maintains Active status, while SN74HC594DW is classified as Last Time Buy.

Frequently Asked Questions (FAQ)

Q: Can SN74HC594DR be used as a direct replacement for MM74HC594M?

A: Yes. SN74HC594DR maintains identical electrical specifications (2V ~ 6V supply, -40°C ~ 85°C operating range), output type (push-pull), and package dimensions (16-SOIC, 0.154", 3.90mm Width). No design modification is required.

Q: What is the difference between 74HC594D,118 and MM74HC594M?

A: Both are 8-bit shift registers with serial-to-parallel function and push-pull output. The 74HC594D,118 extends the operating temperature range to -40°C ~ 125°C and adds serial-mode capability. Package footprint is identical. Substitution is valid if the application does not require the original -40°C ~ 85°C temperature specification.

Q: Why do SN74HC594DW and SN74HC594DWR have different package widths?

A: These parts use 16-SOIC packaging with 0.295" (7.50mm) width, compared to the MM74HC594M's 0.154" (3.90mm) width. This dimensional difference requires PCB layout modification and is not recommended for direct substitution without design review.

Q: Is 74HC594D-Q100,118 suitable for non-automotive applications?

A: Yes. The automotive qualification (AEC-Q100) indicates enhanced reliability and testing standards. This part is functionally compatible with MM74HC594M and suitable for general industrial and consumer applications.

Q: What is the supply voltage compatibility range for all substitute parts?

A: All listed substitutes operate within the 2V ~ 6V supply range specified for MM74HC594M, ensuring voltage compatibility across the entire substitute list.

Q: Which substitute offers the best long-term availability?

A: SN74HC594DR (Texas Instruments, Active status) and 74HC594D,118 (Nexperia USA Inc., Active status) both maintain active product status, indicating ongoing manufacturing and supply chain support.