SN74AHC74RGYRG4 Equivalent & Substitute Parts

Part Overview

The SN74AHC74RGYRG4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in a 14-pin VQFN package with exposed pad. This component functions as a 2-element D-type flip-flop with complementary outputs, set/preset and reset capabilities, and positive edge triggering. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives to maintain design continuity and supply chain reliability.

Substiute Parts

SN74AHC74RGYRG4

Texas InstrumentsIn Stock: 1052SN74AHC74RGYRG4 Datasheet

Current PartRFQ

SN74AHC74RGYR

Texas InstrumentsIn Stock: 3640SN74AHC74RGYR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74AHC74RGYRG4 is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Series: 74AHC (Advanced High-Speed CMOS logic family)
• Type: D-Type Flip-Flop
• Number of Elements: 2
• Number of Bits per Element: 1
• Output Type: Complementary
• Trigger Type: Positive Edge
• Function: Set(Preset) and Reset

Electrical Parameters:

• Clock Frequency: 115 MHz
• Max Propagation Delay @ 5V, 50pF: 9.3 ns
• Current - Output High/Low: 8 mA / 8 mA
• Voltage - Supply: 2V ~ 5.5V
• Current - Quiescent (Iq): 2 µA
• Input Capacitance: 2 pF
• Operating Temperature: -40°C ~ 125°C (TA)

Physical Parameters:

• Mounting Type: Surface Mount
• Package / Case: 14-VFQFN Exposed Pad
• Supplier Device Package: 14-VQFN (4.6x4.6)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 2 (1 Year)
• REACH Status: REACH Unaffected

The primary distinction between the main part and its substitute lies in packaging configuration: the SN74AHC74RGYRG4 is supplied in individual packaging, while the SN74AHC74RGYR is supplied in Tape & Reel (TR) format. All electrical, functional, and mechanical specifications remain identical.

Parameter Comparison

Engineering Selection Recommendations

The SN74AHC74RGYR is a direct functional and electrical equivalent to the SN74AHC74RGYRG4. Both parts are manufactured by Texas Instruments, share identical electrical specifications, and are housed in the same 14-VFQFN package. The substitute part maintains full compliance with ROHS3, REACH, and MSL requirements.

The primary consideration for selection is packaging format. The SN74AHC74RGYR is supplied in Tape & Reel (TR) configuration, which is standard for high-volume production environments. The SN74AHC74RGYRG4 was supplied in individual packaging. For applications requiring single units or small quantities, Tape & Reel packaging may necessitate minimum order quantities; however, the electrical and mechanical compatibility remains absolute.

The SN74AHC74RGYR holds Active product status, ensuring continued availability and manufacturer support, whereas the original part number is discontinued. This substitution provides supply chain continuity without design modification.

Frequently Asked Questions (FAQ)

Q: Are the SN74AHC74RGYRG4 and SN74AHC74RGYR electrically identical?

A: Yes. Both parts are manufactured by Texas Instruments and share identical electrical specifications, including clock frequency (115 MHz), propagation delay (9.3 ns @ 5V, 50pF), output current (8 mA), supply voltage range (2V ~ 5.5V), and operating temperature range (-40°C ~ 125°C).

Q: What is the difference between these two part numbers?

A: The primary difference is packaging format. The SN74AHC74RGYRG4 is supplied in individual packaging, while the SN74AHC74RGYR is supplied in Tape & Reel (TR) format. Both use the identical 14-VFQFN (4.6x4.6) package with exposed pad.

Q: Can I use the SN74AHC74RGYR as a direct replacement on my PCB?

A: Yes. The SN74AHC74RGYR is mechanically and electrically compatible with the SN74AHC74RGYRG4. No PCB modifications or design changes are required. Pin configuration, package footprint, and electrical performance are identical.

Q: Why is the original part number discontinued?

A: The SN74AHC74RGYRG4 is discontinued at DiGi Electronics. The SN74AHC74RGYR remains in active production and is the current recommended part number from Texas Instruments for this logic function.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical compliance status: ROHS3 Compliant, REACH Unaffected, MSL 2 (1 Year), and ECCN EAR99.

Q: What are the implications of Tape & Reel packaging for my application?

A: Tape & Reel packaging is standard for automated assembly and high-volume production. If your application involves manual assembly or requires single units, verify that your supplier can provide the quantity needed. The component itself is identical regardless of packaging format.

Q: Is the 74AHC series suitable for my application requirements?

A: The 74AHC series is an Advanced High-Speed CMOS logic family designed for general-purpose digital logic applications. Verify that the 115 MHz clock frequency, 9.3 ns propagation delay, 2V ~ 5.5V supply voltage range, and -40°C ~ 125°C operating temperature meet your specific application requirements.