74HC393DB,112 Equivalent & Substitute Parts

Part Overview

The 74HC393DB,112 is a binary counter logic IC manufactured by Nexperia USA Inc., featuring dual 4-bit negative edge-triggered counters in a 14-SSOP surface mount package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. The part operates across a 2V to 6V supply range with an asynchronous reset function and supports count rates up to 107 MHz.

Substiute Parts

74HC393DB,112

Nexperia USA Inc.In Stock: 72474HC393DB,112 Datasheet

Current PartRFQ

SN74HC393DBR

Texas InstrumentsIn Stock: 3075SN74HC393DBR Datasheet

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SN74HC393PW

Texas InstrumentsIn Stock: 834SN74HC393PW Datasheet

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SN74HC393PWR

Texas InstrumentsIn Stock: 5144SN74HC393PWR Datasheet

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SN74HC393PWT

Texas InstrumentsIn Stock: 1393SN74HC393PWT Datasheet

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74HC393DB,112

NXP USA Inc.In Stock: 1255074HC393DB,112 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC393DB,112 is determined by the following critical parameters: logic type (binary counter), element count (2), bit width per element (4), trigger mechanism (negative edge), reset configuration (asynchronous), supply voltage compatibility (2V–6V), and package footprint (14-SSOP or equivalent pinout-compatible variants).

The substitute parts are grouped into two categories:

Category 1: Direct Package Equivalents (14-SSOP) Parts maintaining the original 14-SSOP package footprint with identical pinout and electrical specifications.

Category 2: Pinout-Compatible Alternatives (14-TSSOP) Parts with equivalent functionality and pinout but housed in the 14-TSSOP package, requiring PCB layout adjustment due to different package dimensions.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct drop-in replacement with identical package footprint, the SN74HC393DBR is the primary active equivalent, maintaining the 14-SSOP package geometry while offering active product status from Texas Instruments.

For designs where package footprint flexibility exists, the SN74HC393PWR provides the most favorable availability and active product status, though implementation requires PCB layout modification to accommodate the 14-TSSOP package dimensions (0.173" width versus 0.209" for 14-SSOP).

The 74HC393DB,112 from NXP USA Inc. (Tube packaging) remains available as an active parametric equivalent with superior count rate specification (107 MHz versus 36 MHz for Texas Instruments variants) and extended operating temperature range (-40°C to 125°C).

All substitute candidates maintain ROHS3 compliance, MSL Level 1 rating, and identical functional specifications for logic type, element count, bit width, trigger mechanism, and reset configuration.

Frequently Asked Questions (FAQ)

Q: Can SN74HC393PWR replace 74HC393DB,112 directly on the PCB? A: SN74HC393PWR is pinout-compatible but housed in 14-TSSOP package (0.173" width) versus the original 14-SSOP (0.209" width). PCB footprint modification is required; however, pin assignments remain identical.

Q: What is the significance of the count rate difference (107 MHz vs. 36 MHz)? A: The original 74HC393DB,112 supports higher maximum clock frequencies. For applications operating below 36 MHz, Texas Instruments substitutes are fully compatible. Applications requiring operation above 36 MHz must use the NXP 74HC393DB,112 or verify that the lower count rate specification does not constrain system performance.

Q: Are all substitutes RoHS compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and are REACH unaffected, meeting current environmental and regulatory requirements.

Q: What packaging options are available for production? A: The 74HC393DB,112 is supplied in Tube packaging. Texas Instruments alternatives offer Tape & Reel (SN74HC393DBR, SN74HC393PWT), Cut Tape & Digi-Reel (SN74HC393PWR), and Tube (SN74HC393PW) options to accommodate different assembly and procurement workflows.

Q: Does operating temperature range affect substitution suitability? A: The original part operates to 125°C; Texas Instruments variants operate to 85°C. For applications requiring extended temperature operation above 85°C, the NXP 74HC393DB,112 is the appropriate selection.