SN74HC374ANS Equivalent & Substitute Parts

Part Overview

The SN74HC374ANS is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit capacity and tri-state, non-inverted output configuration. This device operates as a standard logic component with positive edge triggering and is housed in a 20-SOIC surface mount package.

The SN74HC374ANS carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production and sales of this specific part number variant. Identifying equivalent substitute parts is necessary to ensure continued component availability for new designs, production runs, and system maintenance where this logic function remains required.

Substiute Parts

SN74HC374ANS

Texas InstrumentsIn Stock: 729SN74HC374ANS Datasheet

Current PartRFQ

SN74HC374ANSR

Texas InstrumentsIn Stock: 2289SN74HC374ANSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC374ANS is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Type: D-Type flip-flop architecture
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Configuration: Tri-State, Non-Inverted
• Trigger Mechanism: Positive Edge

Electrical Parameters:

• Voltage Supply Range: 2V to 6V (must encompass or match)
• Current Output Capability: 7.8 mA high and low
• Quiescent Current: 8 µA
• Input Capacitance: 3 pF
• Propagation Delay: 32 ns @ 6V, 150pF
• Operating Temperature: -40°C to 85°C

Physical Parameters:

• Package: 20-SOIC (0.209", 5.30mm Width)
• Mounting: Surface Mount

Compliance Parameters:

• RoHS3 Compliance
• Moisture Sensitivity Level 1

The substitute part SN74HC374ANSR maintains identical functional, electrical, and physical specifications while offering active product status and improved clock frequency performance (106 MHz versus 35 MHz). The packaging variant (Tape & Reel) represents a distribution format difference only and does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74HC374ANSR

The SN74HC374ANSR is the direct functional and electrical equivalent of the SN74HC374ANS. Selection of this substitute is based on the following engineering criteria:

Product Status Alignment: The SN74HC374ANSR carries Active product status from Texas Instruments, ensuring continued availability, manufacturing support, and long-term supply chain stability. The original SN74HC374ANS is designated Last Time Buy, indicating production discontinuation.

Electrical Equivalence: All critical electrical parameters are identical between the two parts: supply voltage range (2V to 6V), output current capability (7.8 mA), propagation delay (32 ns @ 6V, 150pF), quiescent current (8 µA), and operating temperature range (-40°C to 85°C). The SN74HC374ANSR demonstrates superior clock frequency performance (106 MHz versus 35 MHz), which represents an enhancement that does not compromise backward compatibility.

Compliance and Certification: Both parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), satisfying regulatory and environmental requirements for equivalent component selection.

Physical and Mechanical Compatibility: The 20-SOIC (0.209", 5.30mm Width) surface mount package is identical, ensuring direct PCB footprint compatibility without layout modifications.

Packaging Format: The SN74HC374ANSR is supplied in Tape & Reel format, which is standard for high-volume production and automated assembly processes. This represents a distribution advantage over potential bulk or tube packaging of the original part.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC374ANSR be used as a direct replacement for the SN74HC374ANS in existing designs?

A: Yes. The SN74HC374ANSR is electrically and mechanically equivalent to the SN74HC374ANS. All functional parameters, electrical specifications, and package dimensions are identical. The substitute part can be soldered into the same PCB footprint without design modifications.

Q: What is the difference between the SN74HC374ANS and SN74HC374ANSR?

A: The primary differences are product status and packaging format. The SN74HC374ANS is Last Time Buy (discontinued), while the SN74HC374ANSR is Active (currently produced). The SN74HC374ANSR is supplied in Tape & Reel packaging, whereas the original may have been supplied in alternative formats. The SN74HC374ANSR also specifies a higher maximum clock frequency (106 MHz versus 35 MHz), though both parts meet the same propagation delay specification of 32 ns.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts share identical electrical specifications: 2V to 6V supply voltage, 7.8 mA output current, 8 µA quiescent current, 32 ns propagation delay at 6V with 150pF load, and -40°C to 85°C operating temperature range. The higher clock frequency rating of the SN74HC374ANSR does not alter the propagation delay or other critical timing parameters.

Q: Will the SN74HC374ANSR work in high-speed applications?

A: The SN74HC374ANSR is specified for a maximum clock frequency of 106 MHz and maintains a propagation delay of 32 ns at 6V with 150pF load. Application suitability depends on the specific timing requirements of the circuit. The propagation delay specification is the controlling parameter for timing-critical designs.

Q: Is the Tape & Reel packaging compatible with automated assembly equipment?

A: Yes. Tape & Reel (TR) packaging is the standard format for automated surface mount assembly. The SN74HC374ANSR in Tape & Reel format is compatible with standard pick-and-place equipment and reflow soldering processes used in high-volume manufacturing.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN74HC374ANS and SN74HC374ANSR are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: What is the base product number for these parts?

A: The base product number is 74HC374. Both the SN74HC374ANS and SN74HC374ANSR are variants of this base product, differentiated by packaging and distribution format designations.

Q: Can I mix SN74HC374ANS and SN74HC374ANSR parts in the same production batch?

A: Yes. Since both parts are electrically and mechanically equivalent, they can be used interchangeably in the same circuit design and production environment. However, for supply chain consistency and traceability, it is standard practice to standardize on a single part number per design revision.