SN74LS175D Equivalent & Substitute Parts

Part Overview

The SN74LS175D is a Flip Flop 1 Element D-Type 4 Bit Positive Edge logic integrated circuit manufactured by Texas Instruments in the 74LS series. This component functions as a master reset device with complementary output configuration, operating at a maximum clock frequency of 40 MHz. The device is currently in Last Time Buy status, indicating discontinued production with limited availability. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this logic function.

Substiute Parts

SN74LS175D

Texas InstrumentsIn Stock: 1019SN74LS175D Datasheet

Current PartRFQ

SN74LS175DR

Texas InstrumentsIn Stock: 2613SN74LS175DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS175D 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: Clock frequency of 40 MHz, propagation delay of 25 ns @ 5V with 15pF load
• Output Configuration: Complementary output type with Master Reset function
• Trigger Mechanism: Positive Edge triggering
• Electrical Characteristics: Supply voltage 4.75V ~ 5.25V, output current 400µA (high) and 8mA (low), quiescent current 18 mA
• Operating Range: 0°C ~ 70°C ambient temperature
• Package Specification: 16-SOIC surface mount package with 0.154" (3.90mm) width
• Compliance: ROHS3 compliant, MSL Level 1

Substitute parts must match all parameters listed above to ensure functional and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS175DR is the direct functional equivalent of the SN74LS175D. Both parts are manufactured by Texas Instruments and share identical electrical specifications, performance characteristics, and package configuration. The primary distinction is product status and packaging format: the SN74LS175D is in Last Time Buy status with tube packaging, while the SN74LS175DR is in Active production status with tape and reel packaging. The SN74LS175DR is recommended for new designs and ongoing production requirements due to its active availability and established supply chain. Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS175DR be used as a direct replacement for the SN74LS175D?

A: Yes. Both parts are electrically and mechanically identical. The SN74LS175DR provides the same functional performance, electrical characteristics, and package configuration. The difference is packaging format (tube versus tape & reel) and product lifecycle status.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging (SN74LS175D) is used for lower-volume orders and manual handling. Tape & reel packaging (SN74LS175DR) is designed for automated assembly processes and higher-volume production. Both formats contain the same component with identical specifications.

Q: Why is the SN74LS175D in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer has discontinued production. Existing inventory may be available through authorized distributors, but supply is limited. The SN74LS175DR in Active status is the recommended alternative for continued availability.

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

A: No. Both the SN74LS175D and SN74LS175DR maintain identical ROHS3 compliance and MSL Level 1 ratings. They are functionally equivalent for all regulatory and environmental requirements.

Q: What are the critical parameters for substitution compatibility?

A: Substitution compatibility is determined by matching the D-Type Flip Flop configuration (1 element, 4 bits), clock frequency (40 MHz), propagation delay (25 ns @ 5V, 15pF), output type (complementary), trigger mechanism (positive edge), supply voltage range (4.75V ~ 5.25V), and 16-SOIC package specification. All these parameters must align for functional equivalence.