SN74F174AD Equivalent & Substitute Parts

Part Overview

The SN74F174AD is a Flip Flop 1 Element D-Type 6 Bit Positive Edge logic integrated circuit manufactured by Texas Instruments in 16-SOIC surface mount packaging. This component functions as a master reset device with non-inverted output, operating at a clock frequency of 140 MHz and a maximum propagation delay of 10ns at 5V with 50pF load.

The SN74F174AD carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. Finding equivalent substitute parts is necessary to ensure continued availability for new designs, maintenance applications, and production continuity.

Substiute Parts

SN74F174AD

Texas InstrumentsIn Stock: 2090SN74F174AD Datasheet

Current PartRFQ

SN74F174ADR

Texas InstrumentsIn Stock: 4312SN74F174ADR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74F174AD is determined by strict equivalence across the following critical parameters:

Functional Parameters: Type (D-Type Flip Flop), Number of Elements (1), Number of Bits per Element (6), Trigger Type (Positive Edge), Output Type (Non-Inverted), and Function (Master Reset) must remain identical.

Electrical Parameters: Clock Frequency (140 MHz), Max Propagation Delay (10ns @ 5V, 50pF), Voltage Supply Range (4.5V ~ 5.5V), Current Output specifications (1mA High, 20mA Low), and Quiescent Current (45 mA) must match exactly.

Physical Parameters: Package type (16-SOIC with 0.154" / 3.90mm width) and Mounting Type (Surface Mount) must be identical to ensure PCB compatibility.

Compliance Parameters: RoHS3 Compliance and MSL Level 1 status must be maintained.

The SN74F174ADR qualifies as a direct substitute based on complete alignment with all parameters listed above. The only difference is packaging format: the main part uses Tube packaging while the substitute uses Tape & Reel (TR) packaging. Both formats contain identical die and electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The SN74F174ADR is the direct equivalent substitute for the SN74F174AD. Both parts share identical electrical specifications, functional characteristics, and physical package dimensions. The SN74F174ADR maintains ROHS3 compliance and MSL Level 1 certification, ensuring regulatory and environmental compatibility.

The primary distinction is product status: the SN74F174AD is Last Time Buy, while the SN74F174ADR is Active. This makes the SN74F174ADR the preferred selection for new designs and ongoing production requirements. The packaging format difference (Tube versus Tape & Reel) does not affect electrical performance or PCB assembly compatibility; this difference reflects only the distribution and handling method.

Frequently Asked Questions (FAQ)

Q: Can the SN74F174ADR replace the SN74F174AD in existing designs?

A: Yes. The SN74F174ADR is electrically and functionally identical to the SN74F174AD. Both parts use the same 16-SOIC package with identical pin configuration, electrical specifications, and operating characteristics. No circuit modifications are required.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube and Tape & Reel are distribution formats only. Both contain the same component with identical electrical properties. Tube packaging is used for manual handling and smaller quantities, while Tape & Reel is optimized for automated assembly equipment and higher-volume production. The die and performance are identical.

Q: Why is the SN74F174AD marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued active production of this part number. The SN74F174ADR, which is Active status, represents the current production equivalent and should be used for new designs and future procurement.

Q: Are there any temperature or voltage operating differences between these parts?

A: No. Both parts operate identically across the full temperature range of 0°C to 70°C and voltage supply range of 4.5V to 5.5V. All electrical parameters, including propagation delay, output current, and quiescent current, are identical.

Q: Is the SN74F174ADR compatible with my PCB designed for the SN74F174AD?

A: Yes. The SN74F174ADR uses the same 16-SOIC package footprint with 0.154" (3.90mm) width. Pin-to-pin compatibility is complete, and no PCB redesign is necessary.