SN75155D RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SN75155D is a full-duplex RS232 transceiver manufactured by Texas Instruments, designed for serial communication interface applications. This 1/1 transceiver (one driver and one receiver) operates across a supply voltage range of 4.5V to 15V with a receiver hysteresis of 600 mV. The device is housed in an 8-SOIC surface mount package.

The SN75155D carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. This status necessitates identifying equivalent substitute parts to ensure continued availability for new designs, repairs, and production continuity.

Substiute Parts

SN75155D

Texas InstrumentsIn Stock: 5803SN75155D Datasheet

Current PartRFQ

SN75155DR

Texas InstrumentsIn Stock: 4626SN75155DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75155D is determined by strict equivalence across the following critical parameters:

• Protocol Compatibility: RS232 full-duplex transceiver functionality
• Driver/Receiver Count: 1/1 configuration (one driver, one receiver)
• Electrical Specifications: Supply voltage range 4.5V ~ 15V, receiver hysteresis 600 mV
• Package Compatibility: 8-SOIC surface mount package with identical physical dimensions
• Environmental Compliance: ROHS3 compliance, MSL Level 1, REACH unaffected status
• Base Product Number: 75155 series designation

The SN75155DR qualifies as a direct substitute based on identical electrical characteristics, package specifications, and compliance certifications. The primary distinction is packaging format: the SN75155D is supplied in Tube packaging, while the SN75155DR is available in Cut Tape (CT) and Digi-Reel® formats.

Parameter Comparison

Engineering Selection Recommendations

The SN75155DR is the manufacturer-recommended substitute for the SN75155D. Both devices are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications across all critical parameters.

The SN75155D's Last Time Buy status indicates production discontinuation. The SN75155DR, with Active product status, provides continued availability and supply chain reliability. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications.

The packaging format difference (Tube versus Cut Tape/Digi-Reel) does not affect functional compatibility or electrical performance. Selection between these packaging options depends on procurement volume requirements and assembly process specifications.

Frequently Asked Questions (FAQ)

Q: Can the SN75155DR directly replace the SN75155D in existing designs?

A: Yes. The SN75155DR is electrically and mechanically identical to the SN75155D. All functional parameters, pin configurations, and electrical characteristics are equivalent. The devices are pin-for-pin compatible with no design modifications required.

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

A: Tube packaging supplies components in plastic tubes, typically used for lower-volume orders. Cut Tape and Digi-Reel packaging provide components on continuous tape, suitable for automated assembly processes and higher-volume production. Functional performance is identical; the difference is in handling and assembly methodology.

Q: Why is the SN75155D marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has ceased active production of this part number. Existing inventory may be available through authorized distributors, but long-term availability is not guaranteed. The SN75155DR, with Active status, ensures continued supply for new designs and ongoing production.

Q: Are there any compliance differences between the two parts?

A: No. Both the SN75155D and SN75155DR maintain identical ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status. Environmental and regulatory requirements are fully equivalent.

Q: What are the critical parameters for RS232 transceiver substitution?

A: Critical parameters include protocol type (RS232), driver/receiver configuration (1/1), supply voltage range (4.5V ~ 15V), receiver hysteresis (600 mV), package type (8-SOIC), and mounting method (Surface Mount). Deviation in any of these parameters indicates incompatibility.