SN74HC594DT Equivalent & Substitute Parts

Part Overview

The SN74HC594DT is an 8-bit shift register logic IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This component functions as a serial-to-parallel converter, accepting serial input data and converting it to parallel output format. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs.

Substiute Parts

SN74HC594DT

Texas InstrumentsIn Stock: 727SN74HC594DT Datasheet

Current PartRFQ

SN74HC594DR

Texas InstrumentsIn Stock: 3844SN74HC594DR Datasheet

Parametric EquivalentRFQ

74HC594D,112

Nexperia USA Inc.In Stock: 119274HC594D,112 Datasheet

UpgradeRFQ

74HC594D,118

Nexperia USA Inc.In Stock: 2824374HC594D,118 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC594DT is determined by strict equivalence across the following critical parameters:

• Logic Type: Shift Register
• Number of Bits per Element: 8
• Function: Serial to Parallel conversion capability
• Output Type: Push-Pull
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Voltage - Supply: 2V ~ 6V compatibility
• RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories based on product status and availability:

Parametric Equivalent: SN74HC594DR maintains identical electrical and mechanical specifications with active product status and higher inventory availability.

Upgrade Options: 74HC594D,112 and 74HC594D,118 (Nexperia USA Inc.) provide extended operating temperature range (-40°C ~ 125°C) and alternative packaging formats while maintaining core functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74HC594DR is the direct parametric equivalent to SN74HC594DT. Both components are manufactured by Texas Instruments with identical electrical specifications and package configuration. SN74HC594DR maintains active product status with significantly higher inventory availability (3800 units), making it the preferred choice for immediate procurement and long-term supply chain stability.

Extended Temperature Applications: For applications requiring operation beyond 85°C, 74HC594D,118 (Nexperia USA Inc.) provides an extended operating temperature range of -40°C ~ 125°C while maintaining all core functional parameters. This part is currently active with the highest inventory availability (28149 units) and is supplied in Tape & Reel packaging format.

Alternative Consideration: 74HC594D,112 (Nexperia USA Inc.) offers identical extended temperature capability to 74HC594D,118 but is marked as obsolete. This part should be considered only when 74HC594D,118 is unavailable and extended temperature operation is required.

All substitute options maintain ROHS3 compliance and are suitable for direct pin-compatible replacement in 16-SOIC surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can SN74HC594DR be used as a direct replacement for SN74HC594DT?

A: Yes. SN74HC594DR is a parametric equivalent with identical logic type, bit configuration, function, output type, supply voltage range, operating temperature range, and 16-SOIC package. Pin-for-pin compatibility is maintained.

Q: What is the difference between the Texas Instruments and Nexperia options?

A: SN74HC594DR (Texas Instruments) matches the original SN74HC594DT specifications exactly. The Nexperia parts (74HC594D,112 and 74HC594D,118) provide extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C) and are available in different packaging formats (Tube versus Tape & Reel).

Q: Are the Nexperia parts pin-compatible with the original SN74HC594DT?

A: Yes. Both 74HC594D,112 and 74HC594D,118 maintain the 16-SOIC package configuration and are pin-compatible. The extended temperature range represents an enhancement rather than a deviation from the original specification.

Q: Which substitute should be selected for new designs?

A: For new designs, 74HC594D,118 is recommended due to active product status, extended operating temperature capability, and highest inventory availability. For direct replacement of existing SN74HC594DT applications, SN74HC594DR provides the closest match to original specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. SN74HC594DR, 74HC594D,112, and 74HC594D,118 are all ROHS3 compliant, matching the compliance status of the original SN74HC594DT.

Q: What packaging formats are available for the substitute parts?

A: SN74HC594DR is supplied in Cut Tape (CT) & Digi-Reel format. 74HC594D,112 is supplied in Tube packaging. 74HC594D,118 is supplied in Tape & Reel (TR) format. All maintain the same 16-SOIC physical package.