SN74HCS74QDYYRQ1 Equivalent & Substitute Parts

Part Overview

The SN74HCS74QDYYRQ1 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments. This device functions as a 2-element D-type flip-flop with 1-bit per element, featuring complementary outputs and Set/Preset and Reset functionality. The component operates with positive edge triggering and is housed in a SOT-23-14 thin package for surface mount applications.

The SN74HCS74QDYYRQ1 maintains Active product status. Identifying equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate alternative sourcing requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

SN74HCS74QDYYRQ1

Texas InstrumentsIn Stock: 3722SN74HCS74QDYYRQ1 Datasheet

Current PartRFQ

SN74HCS74DYYR

Texas InstrumentsIn Stock: 4061SN74HCS74DYYR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HCS74QDYYRQ1 is determined by strict equivalence across the following critical parameters:

Functional Parameters: Type (D-Type), Number of Elements (2), Number of Bits per Element (1), Output Type (Complementary), Trigger Type (Positive Edge), and Function (Set/Preset and Reset)

Electrical Parameters: Clock Frequency (105 MHz), Max Propagation Delay (15 ns @ 6V, 50pF), Voltage Supply Range (2V to 6V), Current Output High/Low (7.8 mA each), Quiescent Current (2 µA), and Input Capacitance (5 pF)

Physical Parameters: Package Type (SOT-23-14 Thin), Mounting Type (Surface Mount), and Moisture Sensitivity Level (1)

Compliance Parameters: Product Status (Active), ECCN (EAR99), and HTSUS classification (8542.39.0001)

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The SN74HCS74DYYR is a direct parametric equivalent to the SN74HCS74QDYYRQ1. Both parts are manufactured by Texas Instruments, share identical functional and electrical specifications, and are housed in the same SOT-23-14 thin surface mount package.

The SN74HCS74DYYR carries ROHS3 Compliance and REACH Unaffected status, providing additional regulatory documentation compared to the main part. Both devices maintain Active product status, ensuring continued availability and support from the manufacturer.

Selection between these parts should be based on supply chain availability, inventory levels, and specific compliance requirements of the end application. The electrical and mechanical interchangeability is complete across all specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCS74DYYR be used as a direct replacement for the SN74HCS74QDYYRQ1?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, functional characteristics, and physical packaging. They are directly interchangeable in circuit applications.

Q: Are there differences in packaging between these parts?

A: No. Both the SN74HCS74QDYYRQ1 and SN74HCS74DYYR use the SOT-23-14 thin package for surface mount applications. Pin configuration, lead spacing, and mounting requirements are identical.

Q: What is the significance of the different part number suffixes?

A: The suffix variations (QDYYRQ1 versus DYYR) reflect different manufacturing batches, quality grades, or compliance certifications. The core functional and electrical specifications remain identical. The SN74HCS74DYYR includes explicit ROHS3 and REACH compliance documentation.

Q: Do these parts have the same operating temperature range?

A: Yes. Both parts operate across the temperature range of -40°C to 125°C (TA), ensuring consistent performance across industrial and commercial applications.

Q: Are the supply voltage requirements identical?

A: Yes. Both parts operate with a supply voltage range of 2V to 6V, providing flexibility for integration into various logic system designs.

Q: What is the maximum clock frequency for these devices?

A: Both parts support a maximum clock frequency of 105 MHz with a propagation delay of 15 nanoseconds at 6V with a 50pF load.

Q: Can these parts be used interchangeably in high-speed digital applications?

A: Yes. Both parts meet the same timing specifications and are suitable for applications requiring the specified clock frequency and propagation delay characteristics.