SN74HC393D Equivalent & Substitute Parts

Part Overview

The SN74HC393D is a binary counter logic IC manufactured by Texas Instruments, featuring two independent 4-bit counters with negative edge triggering. This part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. The 74HC393 series maintains consistent core functionality across multiple manufacturers and packaging configurations, enabling direct substitution based on electrical and mechanical parameter alignment.

Substiute Parts

SN74HC393D

Texas InstrumentsIn Stock: 2214SN74HC393D Datasheet

Current PartRFQ

SN74HC393DR

Texas InstrumentsIn Stock: 3774SN74HC393DR Datasheet

DirectRFQ

MC74HC393ADG

onsemiIn Stock: 1789MC74HC393ADG Datasheet

DirectRFQ

74HC393D,652

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

MFR RecommendedRFQ

74HC393D,653

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

MFR RecommendedRFQ

MC74HC393ADR2G

onsemiIn Stock: 4691MC74HC393ADR2G Datasheet

MFR RecommendedRFQ

NLV74HC393ADR2G

onsemiIn Stock: 3728NLV74HC393ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC393D is determined by strict alignment of the following parameters:

Core Functional Parameters (Must Match):

• Logic Type: Binary Counter
• Number of Elements: 2
• Number of Bits per Element: 4
• Direction: Up
• Trigger Type: Negative Edge
• Reset: Asynchronous
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Voltage - Supply: 2 V ~ 6 V
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parameters Allowing Variation:

• Count Rate: Substitute parts may exceed the 36 MHz specification
• Operating Temperature: Substitute parts may provide extended temperature ranges
• Product Status: Active alternatives preferred over discontinued or obsolete parts
• Packaging Configuration: Cut Tape, Digi-Reel, Tube, or Tape & Reel configurations are interchangeable for the same device package

All identified substitutes maintain identical pinout, logic function, and electrical interface characteristics, enabling direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Active Status: SN74HC393DR (Texas Instruments) and MC74HC393ADR2G (onsemi) are the preferred substitutes, both maintaining active product status with full manufacturer support. SN74HC393DR provides electrical equivalence with identical count rate and temperature specifications. MC74HC393ADR2G offers enhanced performance margins with 50 MHz count rate and extended temperature range (-55°C ~ 125°C), suitable for applications requiring broader environmental tolerance.

Secondary Recommendation - Extended Performance: 74HC393D,653 (Nexperia USA Inc.) is an active alternative providing the highest count rate specification (107 MHz) and extended operating temperature range (-40°C ~ 125°C), appropriate for designs requiring performance headroom or operation in elevated temperature environments.

Avoid - Obsolete Status: 74HC393D,652 (Nexperia, Obsolete) and NLV74HC393ADR2G (onsemi, Obsolete) should not be selected for new designs despite current inventory availability. Obsolete classifications indicate discontinued manufacturer support and potential supply discontinuation.

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and identical 14-SOIC package specifications, ensuring direct compatibility with existing PCB layouts and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SN74HC393DR directly replace SN74HC393D on existing boards? A: Yes. Both parts share identical pinout, package dimensions (14-SOIC), and electrical interface specifications. The primary difference is packaging configuration (Cut Tape & Digi-Reel versus Tube), which does not affect board-level functionality.

Q: What is the difference between MC74HC393ADG and MC74HC393ADR2G? A: Both are onsemi 74HC393 variants with identical electrical specifications (50 MHz count rate, -55°C ~ 125°C operating range). The difference is packaging: MC74HC393ADG is supplied in Tube format, while MC74HC393ADR2G is supplied in Tape & Reel format. Select based on your procurement and assembly requirements.

Q: Why do Nexperia parts (74HC393D,652 and 74HC393D,653) show higher count rates (107 MHz)? A: Count rate specifications reflect maximum guaranteed switching frequency under specified conditions. Higher ratings indicate enhanced performance margins but do not change functional behavior in standard applications. Both Nexperia variants are electrically compatible with the original SN74HC393D.

Q: Is the automotive-qualified NLV74HC393ADR2G suitable for my application? A: NLV74HC393ADR2G is obsolete and should not be selected for new designs. Although it carries AEC-Q100 automotive qualification, discontinued status means manufacturer support and supply availability cannot be guaranteed.

Q: What packaging format should I choose? A: Packaging format (Tube, Cut Tape, Digi-Reel, Tape & Reel) does not affect electrical performance or board compatibility. Selection depends on your procurement volume, assembly equipment, and inventory management practices. All formats contain identical die and pinout.

Q: Are there temperature range considerations for substitution? A: The original SN74HC393D operates -40°C ~ 85°C. Substitutes with extended ranges (-55°C ~ 125°C) are fully compatible and provide additional margin for harsh environments. Substitutes with identical or narrower ranges are also compatible if your application requirements fall within those specifications.