SN75138DR Equivalent & Substitute Parts

Part Overview

The SN75138DR is a 4/4 half-duplex transceiver IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as obsolete, with 1,167 units currently in stock. The SN75138DR operates within a supply voltage range of 4.75V to 5.25V and supports operating temperatures from 0°C to 70°C. Due to its obsolete status, identifying functionally compatible substitute components is essential for ongoing system design, maintenance, and production continuity.

Substiute Parts

SN75138DR

Texas InstrumentsIn Stock: 1224SN75138DR Datasheet

Current PartRFQ

SN65C1167ENSR

Texas InstrumentsIn Stock: 9568SN65C1167ENSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the SN75138DR are identified based on the following critical parameters:

• Package Compatibility: Both the main part and substitute must use 16-pin SOIC surface mount packaging to ensure PCB footprint compatibility.
• Transceiver Configuration: The substitute must function as a transceiver IC within the Interface category.
• Supply Voltage Range: The substitute must operate within or encompass the 4.75V to 5.25V supply voltage requirement.
• Operating Temperature Range: The substitute must support the 0°C to 70°C operating temperature window.
• RoHS and Compliance Status: The substitute must maintain ROHS3 compliance and REACH unaffected status to meet regulatory requirements.

The SN65C1167ENSR qualifies as a manufacturer-recommended substitute based on these parameters, though it operates as a full-duplex 2/2 transceiver with enhanced temperature range and supply voltage tolerance.

Parameter Comparison

Engineering Selection Recommendations

The SN65C1167ENSR is designated as the manufacturer-recommended substitute for the obsolete SN75138DR. Selection of this substitute is supported by the following factors:

• Active Product Status: The SN65C1167ENSR maintains active product status with 9,508 units in stock, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.
• Enhanced Operating Range: The substitute provides an extended operating temperature range (-40°C to 85°C) and broader supply voltage tolerance (4.5V to 5.5V), offering improved performance margins in demanding applications.
• Surface Mount Packaging: Both components use 16-SOIC surface mount packages, maintaining compatibility with existing PCB assembly processes.

Design integration requires evaluation of the functional differences between the main part and substitute, specifically the reduction from 4/4 to 2/2 driver/receiver configuration and the transition from half-duplex to full-duplex operation.

Frequently Asked Questions (FAQ)

Q: Can the SN65C1167ENSR directly replace the SN75138DR on existing PCBs?

A: Physical footprint compatibility exists for both components in 16-SOIC surface mount packages. However, the SN65C1167ENSR has a wider package body (5.30mm versus 3.90mm), which may require PCB layout verification. Functional differences in driver/receiver count (2/2 versus 4/4) and duplex mode (full versus half) must be evaluated against circuit requirements.

Q: What are the key functional differences between these components?

A: The SN75138DR operates as a 4/4 half-duplex transceiver, while the SN65C1167ENSR functions as a 2/2 full-duplex transceiver with RS422 and RS485 protocol support. These differences affect channel capacity and communication architecture.

Q: Are both components compliant with current environmental standards?

A: Yes. Both the SN75138DR and SN65C1167ENSR maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic components.

Q: What is the supply voltage compatibility between these parts?

A: The SN75138DR requires 4.75V to 5.25V, while the SN65C1167ENSR accepts 4.5V to 5.5V. The substitute provides broader voltage tolerance, encompassing the main part's operating range with additional margin.

Q: How do the operating temperature ranges compare?

A: The SN75138DR operates from 0°C to 70°C, while the SN65C1167ENSR extends this range to -40°C to 85°C. The substitute supports wider temperature extremes, suitable for industrial and extended-temperature applications.