SN74HCT374PW Equivalent & Substitute Parts

Part Overview

The SN74HCT374PW is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit positive edge triggering in a 20-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74HCT374 logic family provides standard D-Type flip-flop functionality with tri-state, non-inverted outputs suitable for digital logic applications requiring edge-triggered data storage and bus interface capabilities.

Substiute Parts

SN74HCT374PW

Texas InstrumentsIn Stock: 2138SN74HCT374PW Datasheet

Current PartRFQ

SN74HCT374PWR

Texas InstrumentsIn Stock: 4667SN74HCT374PWR Datasheet

DirectRFQ

MM74HCT374MTCX

onsemiIn Stock: 7745MM74HCT374MTCX Datasheet

DirectRFQ

74HCT374PW,118

Nexperia USA Inc.In Stock: 107174HCT374PW,118 Datasheet

MFR RecommendedRFQ

MC74HCT374ADTR2G

onsemiIn Stock: 25514MC74HCT374ADTR2G Datasheet

MFR RecommendedRFQ

SN74HCT574PW

Texas InstrumentsIn Stock: 1722SN74HCT574PW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HCT374PW is determined by the following critical parameters:

Functional Equivalence Requirements:

• Base product number: 74HCT374 or 74HCT574 (same logic family)
• Type: D-Type flip-flop
• Number of elements: 1
• Number of bits per element: 8
• Output type: Tri-State, Non-Inverted
• Trigger type: Positive Edge

Electrical Compatibility Requirements:

• Voltage supply range: 4.5V ~ 5.5V
• Operating temperature range: minimum -40°C (may extend to -55°C or higher)
• Package type: 20-TSSOP surface mount

Acceptable Parameter Variations:

• Clock frequency: 30 MHz or higher (original: 40 MHz)
• Max propagation delay: within acceptable timing margins for the application
• Current output ratings: 6mA or higher (original: 6mA)
• Quiescent current: 8 µA or lower (original: 8 µA)
• Input capacitance: up to 10 pF (original: 3 pF)

Substitutes are grouped into three categories: Direct Manufacturer Equivalents (identical base part number, different packaging), Manufacturer Recommended Alternatives (same logic family, active product status), and Parametric Equivalents (same functional class, minor electrical variations).

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalent (Recommended for Active Production): SN74HCT374PWR is the primary substitute for the discontinued SN74HCT374PW. Both are Texas Instruments 74HCT374 parts with identical electrical specifications and 20-TSSOP packaging. The PWR variant is available in Tape & Reel packaging and maintains active product status, making it suitable for ongoing procurement and production use.

Manufacturer Recommended Alternative (Extended Temperature Range): 74HCT374PW,118 (Nexperia USA Inc.) offers superior specifications including extended operating temperature range (-40°C ~ 125°C), lower quiescent current (4 µA), and higher clock frequency (44 MHz). This part is actively manufactured and recommended for applications requiring enhanced thermal performance or lower power consumption.

Manufacturer Recommended Alternative (Extended Temperature and Voltage Range): MC74HCT374ADTR2G (onsemi) provides the widest operating temperature range (-55°C ~ 125°C) and lowest propagation delay (31ns @ 5V, 50pF). This part is actively manufactured with high inventory availability and is suitable for industrial and extended-temperature applications.

Parametric Equivalent (Same Logic Family, Different Base Part): SN74HCT574PW is a parametric equivalent using the 74HCT574 base product number. While functionally equivalent in D-Type flip-flop operation with 8-bit configuration, this part is also discontinued at DiGi Electronics. It should only be selected if specific application requirements mandate the 74HCT574 variant.

Multi-Source Alternative: MM74HCT374MTCX (onsemi) provides an active, multi-source option with identical 74HCT374 base product number. Although clock frequency is reduced to 30 MHz and input capacitance is higher (10 pF), this part maintains full electrical compatibility and is suitable for applications not requiring maximum speed performance.

All recommended substitutes maintain ROHS3 compliance, identical package geometry (20-TSSOP), and surface mount mounting type. Selection should prioritize active product status and manufacturer availability for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT374PWR directly replace SN74HCT374PW in existing designs? A: Yes. SN74HCT374PWR is a direct equivalent with identical electrical specifications, package type, and pin configuration. The only difference is packaging format (Tape & Reel versus Tube). No design changes are required.

Q: What is the difference between 74HCT374 and 74HCT574? A: Both are D-Type flip-flops with 8-bit configuration in 20-TSSOP packages. The primary difference is the base product number designation. SN74HCT574PW is a parametric equivalent suitable for applications where the 574 variant is specified, but it is currently discontinued.

Q: Which substitute offers the best performance? A: MC74HCT374ADTR2G provides the lowest propagation delay (31ns @ 5V, 50pF) and widest operating temperature range (-55°C ~ 125°C). 74HCT374PW,118 offers the highest clock frequency (44 MHz) and lowest quiescent current (4 µA).

Q: Are all substitutes RoHS compliant? A: Yes. All listed substitutes maintain ROHS3 compliance status, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What packaging options are available? A: All substitutes use 20-TSSOP surface mount packages with identical 0.173" width and 4.40mm dimensions. Packaging format varies between Tube and Tape & Reel (TR) configurations. Verify packaging requirements for your procurement and assembly processes.

Q: Can I use MM74HCT374MTCX if my application requires 40 MHz operation? A: MM74HCT374MTCX has a maximum clock frequency of 30 MHz, which is lower than the original 40 MHz specification. This part is suitable only for applications with clock frequency requirements of 30 MHz or lower.

Q: What is the inventory status of these parts? A: SN74HCT374PWR (4,624 pcs), MM74HCT374MTCX (7,720 pcs), and MC74HCT374ADTR2G (25,410 pcs) are actively stocked. 74HCT374PW,118 has 1,027 pcs available. The original SN74HCT374PW (2,046 pcs) is discontinued at DiGi Electronics.

Q: Do I need to modify my PCB layout for any of these substitutes? A: No. All substitutes use identical 20-TSSOP package geometry and pin configuration. PCB layouts, footprints, and assembly processes remain unchanged.