MM74HC393M Binary Counter IC Equivalent & Substitute Parts

Part Overview

The MM74HC393M is a binary counter IC manufactured by onsemi, featuring two independent 4-bit counters with negative edge triggering. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement continuity. The 74HC393 series provides a standardized logic function across multiple manufacturers, enabling direct functional substitution based on electrical and mechanical parameter alignment.

Substiute Parts

MM74HC393M

onsemiIn Stock: 5778MM74HC393M Datasheet

Current PartRFQ

MC74HC393ADG

onsemiIn Stock: 1789MC74HC393ADG Datasheet

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MC74HC393ADR2G

onsemiIn Stock: 4691MC74HC393ADR2G Datasheet

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SN74HC393D

Texas InstrumentsIn Stock: 2214SN74HC393D Datasheet

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SN74HC393DR

Texas InstrumentsIn Stock: 3774SN74HC393DR Datasheet

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SN74HC393DT

Texas InstrumentsIn Stock: 1856SN74HC393DT Datasheet

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74HC393D,652

Nexperia USA Inc.In Stock: 78874HC393D,652 Datasheet

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74HC393D,653

Nexperia USA Inc.In Stock: 216674HC393D,653 Datasheet

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CD74HC393M96

Texas InstrumentsIn Stock: 2265CD74HC393M96 Datasheet

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CD74HC393MT

Texas InstrumentsIn Stock: 1489CD74HC393MT Datasheet

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SN74HC393NSR

Texas InstrumentsIn Stock: 5838SN74HC393NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MM74HC393M is determined by strict alignment of the following electrical and mechanical parameters:

Core Functional Parameters (Must Match):

• Logic Type: Binary Counter
• Number of Elements: 2
• Number of Bits per Element: 4
• Trigger Type: Negative Edge
• Reset: Asynchronous
• Voltage Supply Range: 2 V ~ 6 V (minimum overlap required)
• Package / Case: 14-SOIC form factor
• Mounting Type: Surface Mount

Performance Parameters (Acceptable Variance):

• Count Rate: Minimum 36 MHz acceptable (all substitutes meet or exceed this threshold)
• Operating Temperature: Extended ranges (-55°C ~ 125°C) are acceptable for applications requiring wider temperature operation

Compliance Parameters:

• RoHS Status: ROHS3 Compliant preferred for new designs
• Moisture Sensitivity Level: MSL 1 (Unlimited) maintained across all substitutes
• REACH Status: REACH Unaffected maintained across all substitutes

Substitute parts are grouped by manufacturer and packaging configuration while maintaining identical functional specifications and pin compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - onsemi Source: MC74HC393ADG (Tube) or MC74HC393ADR2G (Tape & Reel) are direct functional equivalents with extended operating temperature range (-55°C ~ 125°C), active product status, and ROHS3 compliance. These parts maintain the 50 MHz count rate specification and are sourced from the original MM74HC393M manufacturer.

Secondary Recommendation - Texas Instruments Source: SN74HC393DR (Cut Tape & Digi-Reel) or SN74HC393NSR (Tape & Reel) provide active product status with ROHS3 compliance. Count rate specification is 36 MHz, which remains within acceptable operational parameters for most applications. Operating temperature range matches the original specification (-40°C ~ 85°C).

Extended Temperature Requirement: CD74HC393M96 (Cut Tape & Digi-Reel) or 74HC393D,653 (Tape & Reel) support extended operating temperature range (-55°C ~ 125°C) with active product status and ROHS3 compliance. CD74HC393M96 is currently active; 74HC393D,653 is active from Nexperia.

Avoid: Parts with discontinued status (SN74HC393D, SN74HC393DT, CD74HC393MT) should not be selected for new designs due to procurement uncertainty. MM74HC393M and 74HC393D,652 are obsolete and should be replaced.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MM74HC393M with MC74HC393ADG? A: Yes. Both parts share identical functional specifications (2-element, 4-bit binary counter, negative edge trigger, asynchronous reset, 2V-6V supply). MC74HC393ADG is manufactured by the same company (onsemi) and offers extended temperature range and active product status.

Q: What is the difference between the onsemi and Texas Instruments versions? A: Functional operation is identical across all manufacturers. The primary differences are count rate specification (onsemi: 50 MHz; Texas Instruments: 35-36 MHz) and operating temperature range. All meet the core 14-SOIC package and electrical interface requirements.

Q: Does packaging type affect electrical compatibility? A: No. Tube, Tape & Reel, and Cut Tape packaging variants contain identical die and pin configurations. Packaging selection is determined by assembly process requirements and volume considerations, not electrical performance.

Q: Why do some parts have higher count rates (107 MHz for Nexperia)? A: Higher count rate specifications indicate improved performance margin but do not affect functional compatibility. The 74HC393 logic function operates identically regardless of maximum rated frequency, provided the application clock does not exceed the part's specified maximum.

Q: Are all substitute parts ROHS3 compliant? A: All active and recently discontinued parts listed are ROHS3 compliant. The original MM74HC393M does not specify RoHS status. For new designs, select from ROHS3-compliant alternatives.

Q: Can I use parts with different operating temperature ranges interchangeably? A: Yes, provided your application operates within the overlapping temperature range. If your design requires -55°C operation, select MC74HC393ADG, MC74HC393ADR2G, CD74HC393M96, or 74HC393D,653. If -40°C to 85°C is sufficient, all listed parts are acceptable.

Q: What is MSL 1 (Unlimited) and why is it consistent across all parts? A: Moisture Sensitivity Level 1 (Unlimited) indicates the component has no moisture sensitivity restrictions and requires no special handling or baking procedures prior to assembly. This specification is maintained across all 74HC393 variants.