CD74HC393M Equivalent & Substitute Parts

Part Overview

The CD74HC393M is a binary counter IC manufactured by Texas Instruments, featuring two independent 4-bit counters with negative edge triggering. This component is classified as a logic IC and is currently discontinued at DiGi Electronics. The part operates across a supply voltage range of 2V to 6V with a maximum count rate of 35 MHz and supports asynchronous reset functionality. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

Substiute Parts

CD74HC393M

Texas InstrumentsIn Stock: 2493CD74HC393M Datasheet

Current PartRFQ

CD74HC393M96

Texas InstrumentsIn Stock: 2265CD74HC393M96 Datasheet

DirectRFQ

MC74HC393ADR2G

onsemiIn Stock: 4691MC74HC393ADR2G 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

MC74HC393ADG

onsemiIn Stock: 1789MC74HC393ADG Datasheet

MFR RecommendedRFQ

NLV74HC393ADR2G

onsemiIn Stock: 3728NLV74HC393ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HC393M is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• 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: 2V ~ 6V
• RoHS Status: ROHS3 Compliant

Allowable Variations:

• Count Rate: Substitute parts may exceed the original 35 MHz specification
• Operating Temperature: Substitute parts may have narrower ranges (e.g., -40°C ~ 125°C instead of -55°C ~ 125°C)
• Manufacturer: Different manufacturers within the 74HC393 series are acceptable
• Packaging Format: Cut Tape, Tape & Reel, or Tube formats are interchangeable for the same part number
• Product Status: Active parts are preferred over obsolete alternatives

All identified substitute parts maintain full functional and electrical compatibility with the CD74HC393M within these parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CD74HC393M96

The CD74HC393M96 is the direct active equivalent from Texas Instruments. It maintains identical electrical specifications and temperature range to the original CD74HC393M while offering active product status and current availability. This part is suitable for all applications requiring the original CD74HC393M.

Secondary Recommendations: MC74HC393ADR2G and MC74HC393ADG

Both onsemi parts (MC74HC393ADR2G and MC74HC393ADG) are active alternatives with enhanced count rate performance (50 MHz versus 35 MHz). These parts maintain the full temperature range (-55°C ~ 125°C) and are ROHS3 compliant. The primary difference is packaging format: MC74HC393ADR2G is supplied in Tape & Reel format, while MC74HC393ADG is supplied in Tube format.

Tertiary Recommendation: 74HC393D,653

The Nexperia 74HC393D,653 is an active part with superior count rate performance (107 MHz). However, its operating temperature range is narrower (-40°C ~ 125°C) compared to the original specification (-55°C ~ 125°C). This part is suitable only for applications where the lower temperature limit of -40°C is acceptable.

Not Recommended: 74HC393D,652 and NLV74HC393ADR2G

Both parts have obsolete product status and should not be selected for new designs or ongoing production. The NLV74HC393ADR2G additionally carries automotive qualification (AEC-Q100), which is unnecessary for general-purpose applications.

Frequently Asked Questions (FAQ)

Q: Can I use CD74HC393M96 as a direct replacement for CD74HC393M?

A: Yes. The CD74HC393M96 is functionally and electrically identical to the CD74HC393M. Both are manufactured by Texas Instruments, share the same base product number (74HC393), and maintain identical specifications across all critical parameters including voltage supply, temperature range, and package configuration.

Q: What is the difference between MC74HC393ADR2G and MC74HC393ADG?

A: Both parts are manufactured by onsemi and are electrically identical. The difference is packaging format only. MC74HC393ADR2G is supplied in Tape & Reel (TR) format, while MC74HC393ADG is supplied in Tube format. Selection depends on your procurement and assembly requirements.

Q: Why do some substitute parts have higher count rates (50 MHz or 107 MHz) than the original 35 MHz?

A: Higher count rates indicate improved performance specifications from alternative manufacturers. These parts are fully compatible with the CD74HC393M and can operate at the original 35 MHz specification without issue. The higher rating provides additional performance margin for demanding applications.

Q: Can I use 74HC393D,653 if my application operates at temperatures below -40°C?

A: No. The 74HC393D,653 has a minimum operating temperature of -40°C. If your application requires operation at -55°C, you must select a part with the extended temperature range, such as CD74HC393M96, MC74HC393ADR2G, or MC74HC393ADG.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts maintain ROHS3 compliance, matching the environmental and regulatory status of the original CD74HC393M.

Q: Should I consider the automotive-qualified NLV74HC393ADR2G for general applications?

A: No. The NLV74HC393ADR2G is obsolete and carries unnecessary automotive qualification (AEC-Q100). For general-purpose applications, select from the active alternatives: CD74HC393M96, MC74HC393ADR2G, MC74HC393ADG, or 74HC393D,653.