SN75240P Equivalent & Substitute Parts

Part Overview

The SN75240P is a Transient Voltage Suppressor (TVS) device with mixed technology designed for circuit protection applications, particularly in USB interfaces. This through-hole mounted component operates at a 7V clamping voltage and is housed in an 8-DIP package. The SN75240P is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain component availability for new production runs and legacy system support.

Substiute Parts

SN75240P

Texas InstrumentsIn Stock: 2674SN75240P Datasheet

Current PartRFQ

SN65240PWR

Texas InstrumentsIn Stock: 4781SN65240PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75240P is determined by the following critical parameters:

• Voltage - Clamping (7V): The substitute must maintain identical clamping voltage to ensure equivalent transient protection performance.
• Technology (Mixed Technology): The substitute must use the same mixed technology approach for consistent electrical characteristics.
• Number of Circuits (1): Single-circuit configuration must be preserved.
• Applications (USB): The substitute must be rated for USB circuit protection applications.
• RoHS3 Compliance: Both parts must meet ROHS3 requirements for regulatory alignment.
• REACH Unaffected Status: Compliance status must remain consistent.

The SN65240PWR qualifies as a manufacturer-recommended substitute based on these parameters. While the mounting type differs (Surface Mount vs. Through Hole), the electrical specifications and functional performance remain equivalent, allowing for design adaptation in new implementations.

Parameter Comparison

Engineering Selection Recommendations

The SN65240PWR is the manufacturer-recommended substitute for the SN75240P. Both components are manufactured by Texas Instruments and maintain identical electrical specifications for transient voltage suppression at 7V clamping voltage. The SN65240PWR holds Active product status, ensuring continued availability and support, whereas the SN75240P is in Last Time Buy status.

The primary design consideration is the transition from through-hole to surface-mount technology. The SN65240PWR uses 8-TSSOP packaging, which requires PCB layout modifications and surface-mount assembly processes. This substitution is suitable for new designs or redesigns where surface-mount assembly is feasible. Both parts maintain full ROHS3 compliance and REACH Unaffected status, ensuring regulatory consistency.

Frequently Asked Questions (FAQ)

Q: Can the SN65240PWR directly replace the SN75240P in existing through-hole PCB designs?

A: No. The SN65240PWR uses surface-mount 8-TSSOP packaging, while the SN75240P uses through-hole 8-DIP packaging. Direct board-level substitution is not possible without PCB redesign. However, the electrical specifications are equivalent, making the SN65240PWR suitable for new PCB designs or board revisions.

Q: Are the electrical characteristics identical between these two parts?

A: Yes. Both the SN75240P and SN65240PWR operate at 7V clamping voltage, use mixed technology, contain a single circuit, and are rated for USB applications. The functional performance for transient voltage suppression is equivalent.

Q: Why is the SN75240P in Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part. The SN65240PWR, with its Active status, represents the current manufacturing alternative for equivalent transient voltage suppression functionality.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN75240P and SN65240PWR are ROHS3 Compliant and REACH Unaffected, maintaining consistent regulatory compliance for circuit protection applications.

Q: What is the primary design consideration when switching from SN75240P to SN65240PWR?

A: The primary consideration is the packaging transition from through-hole DIP to surface-mount TSSOP. This requires PCB layout modifications, updated assembly processes, and potential changes to thermal management strategies. The electrical performance remains equivalent.