74HCT393D,653 Equivalent & Substitute Parts

Part Overview

The 74HCT393D,653 is a binary counter logic IC manufactured by Nexperia USA Inc., designed for digital counting applications requiring a 2-element, 4-bit counter with negative edge triggering. This Surface Mount device operates across a 4.5V to 5.5V supply range and supports count rates up to 107 MHz. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit functional equivalents from alternative manufacturers. The 74HCT393 series maintains consistent pin configurations and electrical characteristics across multiple manufacturers, enabling direct substitution within defined parameter boundaries.

Substiute Parts

74HCT393D,653

Nexperia USA Inc.In Stock: 259574HCT393D,653 Datasheet

Current PartRFQ

CD74HCT393M

Harris CorporationIn Stock: 5917CD74HCT393M Datasheet

SimilarRFQ

CD74HCT393M96

Texas InstrumentsIn Stock: 2084CD74HCT393M96 Datasheet

SimilarRFQ

CD74HCT393MT

Texas InstrumentsIn Stock: 1759CD74HCT393MT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HCT393D,653 is determined by strict equivalence in the following critical parameters:

• Logic Function: Binary counter with 2 elements, 4 bits per element, up-counting direction
• Trigger Mechanism: Negative edge triggering with asynchronous reset
• Electrical Interface: 4.5V to 5.5V supply voltage compatibility
• Package Compatibility: 14-SOIC form factor with identical pin configuration
• Base Series: 74HCT393 designation across all qualified substitutes

All substitute parts listed maintain these core functional and electrical characteristics. Variations in count rate specifications and operating temperature ranges are noted but do not preclude substitution when application requirements fall within the substitute's rated parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The 74HCT393D,653 from Nexperia remains the preferred choice for new designs due to active production status, full RoHS3 compliance, and superior count rate specification of 107 MHz.

Secondary Selection - CD74HCT393M96 (Texas Instruments): This part qualifies as a direct functional substitute with active product status and ROHS3 compliance. The 27 MHz count rate is suitable for applications not requiring the full 107 MHz capability of the primary part. Extended operating temperature range (-55°C to 125°C) provides additional margin for demanding thermal environments.

Tertiary Selection - CD74HCT393MT (Texas Instruments): Functionally equivalent to CD74HCT393M96 with identical electrical and package specifications. Product status is listed as discontinued at DiGi Electronics; availability through alternative distribution channels should be confirmed before design commitment.

Not Recommended - CD74HCT393M (Harris Corporation): This part carries obsolete product status and RoHS non-compliance, making it unsuitable for new designs or applications subject to RoHS3 regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT393M96 directly replace 74HCT393D,653 in existing designs?

A: Yes. Both parts share identical pin configurations, package form factors (14-SOIC), and core functional specifications (2-element, 4-bit binary counter with negative edge triggering). The 27 MHz count rate of the CD74HCT393M96 is lower than the 74HCT393D,653 specification of 107 MHz; substitution is valid only when application clock frequencies remain below 27 MHz.

Q: What is the significance of the count rate difference between 74HCT393D,653 (107 MHz) and substitute parts (27 MHz)?

A: Count rate defines the maximum clock frequency at which the counter operates reliably. Applications operating at clock frequencies below 27 MHz experience no functional impact from this specification difference. Applications requiring operation above 27 MHz must retain the 74HCT393D,653 or equivalent high-speed variants.

Q: Are all substitute parts RoHS3 compliant?

A: No. CD74HCT393M from Harris Corporation is RoHS non-compliant. CD74HCT393M96 and CD74HCT393MT from Texas Instruments are both ROHS3 compliant. Design requirements for RoHS3 compliance eliminate CD74HCT393M as a viable substitute.

Q: Does the extended operating temperature range of substitute parts (-55°C to 125°C versus -40°C to 125°C) affect substitution decisions?

A: The extended lower temperature limit of substitute parts provides additional operational margin. Substitution is valid across all temperature ranges. Applications operating within the -40°C to 125°C window experience no functional difference.

Q: What packaging formats are available for 74HCT393 binary counters?

A: All listed parts use 14-SOIC (0.154", 3.90mm Width) surface mount packaging. Pin configuration and PCB footprint requirements are identical across all substitutes, enabling direct board-level replacement without layout modifications.

Q: Is CD74HCT393MT still available for new orders?

A: CD74HCT393MT is listed as discontinued at DiGi Electronics. Availability through alternative distribution channels requires direct supplier verification. For new designs, CD74HCT393M96 is the recommended Texas Instruments substitute due to confirmed active production status.