SN74ALS175D Equivalent & Substitute Parts

Part Overview

The SN74ALS175D is a Flip Flop 1 Element D-Type 4 Bit Positive Edge logic integrated circuit manufactured by Texas Instruments in the 74ALS series. This component functions as a master reset device with complementary output configuration, operating at a clock frequency of 50 MHz with a maximum propagation delay of 17ns at 5V with 50pF load. The SN74ALS175D is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent substitute parts is necessary to ensure continued availability and support for new designs or production runs requiring this functional specification.

Substiute Parts

SN74ALS175D

Texas InstrumentsIn Stock: 2772SN74ALS175D Datasheet

Current PartRFQ

SN74ALS175DR

Texas InstrumentsIn Stock: 6208SN74ALS175DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS175D is determined by strict equivalence across the following critical parameters:

• Functional Type: D-Type Flip Flop with 1 Element, 4 Bits per Element
• Electrical Performance: 50 MHz clock frequency, 17ns maximum propagation delay at 5V with 50pF load, complementary output configuration
• Electrical Characteristics: 4.5V to 5.5V supply voltage range, 400µA output high current, 8mA output low current, 14mA quiescent current
• Trigger Configuration: Positive edge trigger with master reset function
• Package Specification: 16-SOIC surface mount package with 0.154" (3.90mm) width
• Environmental Compliance: ROHS3 compliance, MSL Level 1, REACH unaffected status

Substitute parts must match all parameters listed above without deviation. Packaging format differences (Tube versus Tape & Reel) do not affect functional equivalence but may impact procurement and handling requirements.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS175DR is a direct functional equivalent to the SN74ALS175D. Both parts are manufactured by Texas Instruments and share identical electrical specifications, performance characteristics, and package dimensions. The primary distinction is product status and packaging format: the SN74ALS175D is Last Time Buy, while the SN74ALS175DR maintains Active status with higher current inventory availability.

For new designs or production continuity, the SN74ALS175DR is the appropriate selection. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The Tape & Reel packaging of the SN74ALS175DR is standard for high-volume manufacturing and automated assembly processes, whereas the Tube packaging of the SN74ALS175D is typically used for lower-volume or manual assembly applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS175DR be used as a direct replacement for the SN74ALS175D?

A: Yes. The SN74ALS175DR is electrically and functionally identical to the SN74ALS175D. All electrical parameters, timing specifications, output characteristics, and supply voltage requirements are equivalent. The parts are pin-compatible and can be substituted without circuit modification.

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

A: Tube packaging contains individual components in a plastic tube, suitable for manual handling and lower-volume applications. Tape & Reel packaging places components on a continuous carrier tape wound on a reel, designed for automated pick-and-place assembly equipment. Both packaging formats contain identical components with no functional difference.

Q: Why is the SN74ALS175D marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. Existing inventory may be available from distributors, but no new manufacturing runs are planned. The SN74ALS175DR remains in Active production status and is the recommended alternative for ongoing supply assurance.

Q: Are there any compliance or environmental differences between these parts?

A: No. Both the SN74ALS175D and SN74ALS175DR maintain identical ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and REACH unaffected status. Environmental and regulatory requirements are equivalent.

Q: What is the pin configuration for the 16-SOIC package?

A: Both parts use the 16-SOIC (Small Outline Integrated Circuit) package with 0.154" (3.90mm) body width. Pin configuration and spacing are identical between the two part numbers.