SN74LS75D Equivalent & Substitute Parts

Part Overview

The SN74LS75D is a D-Type Transparent Latch quad bistable logic integrated circuit manufactured by Texas Instruments. This 16-SOIC surface mount device provides four independent latch channels with 1:1 circuit configuration and differential output capability. The main part number SN74LS75D is currently in Last Time Buy status with 1,061 pieces available in new original stock. Due to its Last Time Buy classification, identifying functionally equivalent substitute parts is essential for long-term design continuity and procurement planning.

Substiute Parts

SN74LS75D

Texas InstrumentsIn Stock: 1141SN74LS75D Datasheet

Current PartRFQ

SN74LS75DR

Texas InstrumentsIn Stock: 908SN74LS75DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LS75D is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch (4 independent channels)
• Circuit Configuration: 1:1 ratio
• Output Type: Differential
• Supply Voltage: 4.75V ~ 5.25V
• Propagation Delay: 9ns
• Output Current Specifications: 400µA (high), 8mA (low)
• Operating Temperature: 0°C ~ 70°C
• Package: 16-SOIC surface mount
• Base Product Number: 74LS75 series

The SN74LS75DR qualifies as a direct substitute because it maintains identical electrical specifications, logic function, and package configuration. The primary difference is packaging format: SN74LS75D is supplied in Tube packaging, while SN74LS75DR is supplied in Tape & Reel (TR) format. Both parts share the same base product number (74LS75) and are manufactured by Texas Instruments.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS75DR is a direct functional equivalent to the SN74LS75D. Both parts are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications. The SN74LS75D is designated Last Time Buy, indicating limited future availability. The SN74LS75DR maintains Active product status, ensuring continued supply and support.

Both parts satisfy ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. The substitution involves only a packaging format change from Tube to Tape & Reel (TR), which affects procurement and handling procedures but does not impact electrical performance or circuit compatibility.

Selection between these parts should be based on packaging requirements and supply chain considerations. The SN74LS75DR is recommended for new designs and long-term production due to its Active status and standard Tape & Reel packaging format.

Frequently Asked Questions (FAQ)

Q: Can SN74LS75DR be used as a direct replacement for SN74LS75D in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format: SN74LS75D uses Tube packaging while SN74LS75DR uses Tape & Reel (TR) packaging. Circuit performance and pin configuration are identical.

Q: What is the significance of the Last Time Buy status on SN74LS75D?

A: Last Time Buy indicates that Texas Instruments will discontinue production of this part number. Existing inventory (1,061 pieces) represents the final available stock. The SN74LS75DR, with Active status, is the recommended long-term alternative.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 1 - Unlimited). Regulatory and environmental compliance is equivalent.

Q: Does packaging format affect circuit performance?

A: No. Tube and Tape & Reel (TR) packaging formats are different only in how components are supplied and handled during assembly. Electrical specifications, timing characteristics, and output performance remain identical.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on matching logic type (D-Type Transparent Latch), circuit configuration (1:1), output type (Differential), supply voltage (4.75V ~ 5.25V), propagation delay (9ns), output current specifications (400µA high, 8mA low), operating temperature range (0°C ~ 70°C), and package type (16-SOIC surface mount).