74VHC393MTC Binary Counter IC Equivalent & Substitute Parts

Part Overview

The 74VHC393MTC is a dual 4-bit binary counter IC manufactured by onsemi, designed for digital counting and frequency division applications. This component features two independent 4-bit counters with asynchronous reset capability, operating at a maximum count rate of 115 MHz across a supply voltage range of 2 V to 5.5 V. The device is housed in a 14-TSSOP surface mount package.

The 74VHC393MTC is classified as obsolete, making equivalent substitute parts necessary for ongoing production, maintenance, and new design implementations. Identifying compatible alternatives ensures design continuity and supply chain reliability.

Substiute Parts

74VHC393MTC

onsemiIn Stock: 219674VHC393MTC Datasheet

Current PartRFQ

SN74LV393APWR

Texas InstrumentsIn Stock: 2370SN74LV393APWR Datasheet

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SN74LV393ATPWREP

Texas InstrumentsIn Stock: 944SN74LV393ATPWREP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74VHC393MTC are qualified based on the following critical parameters that must remain consistent:

• Logic Function: Binary counter with 2 elements, 4 bits per element, up-counting direction
• Trigger Mechanism: Negative edge triggering
• Reset Configuration: Asynchronous reset
• Package Compatibility: 14-TSSOP surface mount package with identical pinout
• Electrical Specifications: Supply voltage range 2 V to 5.5 V, operating temperature range, and count rate capability
• Moisture Sensitivity: MSL 1 (Unlimited)

The substitute parts identified—SN74LV393APWR and SN74LV393ATPWREP—maintain functional equivalence through identical logic architecture and package specifications. Both are manufactured by Texas Instruments and belong to the 74LV logic family, which operates within the same voltage and temperature parameters as the original 74VHC series.

Parameter Comparison

Engineering Selection Recommendations

SN74LV393APWR is the primary substitute for the 74VHC393MTC. This part is manufactured by Texas Instruments with active product status, ensuring long-term availability and supply chain stability. It maintains full functional equivalence with identical logic architecture, package specifications, and electrical operating parameters. The device is ROHS3 compliant, meeting modern environmental and regulatory requirements.

SN74LV393ATPWREP serves as an alternative substitute with extended operating temperature range (-40°C to 105°C compared to -40°C to 85°C), providing additional thermal margin for demanding applications. However, this part carries a Last Time Buy status, indicating limited future availability. Selection of this part should be reserved for applications requiring the extended temperature specification.

Both substitute parts operate at a maximum count rate of 70 MHz, which is lower than the original 74VHC393MTC specification of 115 MHz. Applications requiring the full 115 MHz count rate capability must evaluate whether the 70 MHz specification is acceptable for the intended circuit function.

Frequently Asked Questions (FAQ)

Q: Can SN74LV393APWR directly replace 74VHC393MTC in existing designs?

A: Yes, SN74LV393APWR provides direct functional replacement with identical pinout, logic architecture, and package specifications. Both devices feature dual 4-bit binary counters with asynchronous reset and negative edge triggering. The primary design consideration is the reduced maximum count rate (70 MHz versus 115 MHz).

Q: What is the difference between SN74LV393APWR and SN74LV393ATPWREP?

A: Both parts are functionally identical binary counters with the same logic specifications and 14-TSSOP package. The key difference is operating temperature range: SN74LV393APWR operates from -40°C to 85°C, while SN74LV393ATPWREP extends to 105°C. Additionally, SN74LV393ATPWREP is designated Last Time Buy, indicating limited future availability.

Q: Are there packaging differences between the main part and substitutes?

A: No. All three parts use the 14-TSSOP surface mount package with identical dimensions (0.173" width, 4.40mm). Pin configuration and mechanical compatibility are fully preserved across all variants.

Q: What compliance certifications apply to the substitute parts?

A: Both Texas Instruments substitutes (SN74LV393APWR and SN74LV393ATPWREP) are ROHS3 compliant and REACH unaffected. Both carry ECCN EAR99 classification and HTSUS code 8542.39.0001, matching the regulatory profile of the original part.

Q: Is the 70 MHz count rate of the substitutes sufficient for my application?

A: This depends on your specific circuit requirements. If your design operates at or below 70 MHz, the substitutes are fully compatible. If your application requires the full 115 MHz capability of the original 74VHC393MTC, alternative parts with higher count rate specifications must be evaluated.

Q: What is the moisture sensitivity level for these parts?

A: All three parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special moisture control requirements.