SN75154N Equivalent & Substitute Parts

Part Overview

The SN75154N is a 0/4 Receiver RS232 interface IC manufactured by Texas Instruments in a 16-DIP package. This component is classified as Last Time Buy, indicating discontinued production with limited remaining inventory. The SN75154N provides single-direction RS232 reception capability with a receiver hysteresis of 3.3 V and operates within a 4.5V to 5.5V supply voltage range across a 0°C to 70°C temperature window.

Finding equivalent or substitute parts becomes necessary when the SN75154N reaches end-of-life status or when design requirements shift toward active production components with extended operational ranges or enhanced functionality.

Substiute Parts

SN75154N

Texas InstrumentsIn Stock: 2211SN75154N Datasheet

Current PartRFQ

TRS208IDBR

Texas InstrumentsIn Stock: 2494TRS208IDBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75154N is determined by the following critical parameters:

Protocol Compatibility: Both the main part and substitute must operate under RS232 standard to maintain signal integrity and communication protocol adherence.

Supply Voltage Range: The substitute must accept the 4.5V to 5.5V supply voltage range to ensure direct integration into existing power distribution networks.

Receiver Functionality: The substitute must provide receiver capability to maintain the reception function of the original design.

Package and Mounting Consideration: While the SN75154N uses Through Hole mounting in a 16-DIP package, substitutes may employ Surface Mount technology with different package geometries, requiring PCB redesign or adapter solutions.

The TRS208IDBR qualifies as a manufacturer-recommended substitute despite functional and packaging differences because it maintains RS232 protocol compliance, operates within the required 4.5V to 5.5V supply range, and provides receiver functionality with enhanced specifications suitable for modern applications.

Parameter Comparison

Engineering Selection Recommendations

For Last Time Buy Mitigation: The SN75154N is designated Last Time Buy, making the TRS208IDBR the manufacturer-recommended alternative. The TRS208IDBR carries Active product status, ensuring continued availability and long-term supply chain stability.

For Compliance Requirements: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for industrial and commercial applications.

For Extended Operating Range: The TRS208IDBR extends the operating temperature range to -40°C to 85°C compared to the SN75154N's 0°C to 70°C, providing suitability for wider environmental conditions.

For Integration Considerations: Substitution requires evaluation of mounting technology differences. The SN75154N uses Through Hole mounting while the TRS208IDBR employs Surface Mount technology, necessitating PCB layout modifications or the use of adapter solutions for direct replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the TRS208IDBR directly replace the SN75154N in a Through Hole PCB layout?

A: Direct pin-for-pin replacement is not possible due to package differences. The SN75154N uses a 16-DIP Through Hole package while the TRS208IDBR uses a 24-SSOP Surface Mount package. PCB redesign or an adapter board is required for integration.

Q: What is the primary functional difference between these parts?

A: The SN75154N is a receiver-only device (0/4 configuration), while the TRS208IDBR is a full transceiver (4/4 configuration) capable of both transmission and reception. Applications requiring only reception can utilize the TRS208IDBR without activating transmission channels.

Q: Are both parts compatible with the same 5V supply voltage?

A: Yes. Both the SN75154N and TRS208IDBR operate within the 4.5V to 5.5V supply voltage range, allowing use in standard 5V logic systems without additional voltage regulation.

Q: Why does the TRS208IDBR have a lower receiver hysteresis value?

A: The TRS208IDBR specifies 500 mV receiver hysteresis compared to the SN75154N's 3.3 V. Lower hysteresis improves noise immunity and signal detection sensitivity, making the TRS208IDBR suitable for applications requiring faster response to marginal signal levels.

Q: What compliance certifications apply to both parts?

A: Both the SN75154N and TRS208IDBR are ROHS3 compliant and REACH unaffected, meeting environmental and hazardous substance restrictions for industrial and consumer electronics applications.