SN75154D Equivalent & Substitute Parts

Part Overview

The SN75154D is a receiver IC designed for RS232 interface applications, manufactured by Texas Instruments. This 16-SOIC surface mount device provides 0/4 receiver functionality with a supply voltage range of 4.5V to 5.5V and operates across 0°C to 70°C. The product is currently in Last Time Buy status, indicating end-of-life phase. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring RS232 receiver functionality.

Substiute Parts

SN75154D

Texas InstrumentsIn Stock: 1622SN75154D Datasheet

Current PartRFQ

TRS208IDBR

Texas InstrumentsIn Stock: 2494TRS208IDBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75154D receiver is determined by the following critical parameters:

Protocol Compatibility: RS232 interface standard is mandatory for functional equivalence.

Supply Voltage Range: The substitute must operate within or encompass the 4.5V to 5.5V supply range.

Receiver Configuration: The substitute must provide receiver functionality suitable for RS232 applications.

Package Compatibility: Surface mount packages with compatible pinout and footprint dimensions are required for direct board-level replacement.

Compliance Standards: RoHS3 compliance and MSL rating must be maintained for manufacturing and environmental requirements.

The TRS208IDBR is identified as a manufacturer-recommended substitute. While this part operates as a full transceiver (4/4 configuration) rather than a receiver-only device, it provides complete RS232 interface capability with enhanced specifications, broader operating temperature range, and active product status.

Parameter Comparison

Engineering Selection Recommendations

The SN75154D is in Last Time Buy status, making substitution planning essential for ongoing production and design updates.

TRS208IDBR Selection Criteria:

The TRS208IDBR maintains identical supply voltage specifications (4.5V ~ 5.5V) and RS232 protocol compliance, ensuring functional compatibility for receiver operations. Both devices are ROHS3 compliant with MSL 1 rating, meeting manufacturing and environmental requirements.

The TRS208IDBR offers extended operating temperature range (-40°C to 85°C) compared to the SN75154D (0°C to 70°C), providing broader application flexibility. The transceiver configuration (4/4) includes full driver and receiver capability, exceeding the receiver-only functionality of the SN75154D.

Package differences exist: the SN75154D uses 16-SOIC while the TRS208IDBR uses 24-SSOP. PCB layout modification is required for direct substitution. The TRS208IDBR's active product status ensures long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the TRS208IDBR directly replace the SN75154D on existing PCBs?

A: Direct board-level replacement is not possible due to package differences. The SN75154D uses 16-SOIC packaging while the TRS208IDBR uses 24-SSOP packaging. PCB redesign and layout modification are required.

Q: Are the supply voltage requirements compatible?

A: Yes. Both the SN75154D and TRS208IDBR operate within the 4.5V to 5.5V supply range, ensuring voltage compatibility.

Q: What is the functional difference between these parts?

A: The SN75154D is a receiver-only device (0/4 configuration), while the TRS208IDBR is a full transceiver (4/4 configuration) providing both driver and receiver functionality. Applications requiring only receiver capability can utilize the TRS208IDBR's receiver channels.

Q: Does the TRS208IDBR meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant with MSL 1 rating, meeting identical manufacturing and environmental compliance requirements.

Q: Why is the operating temperature range different?

A: The TRS208IDBR operates across -40°C to 85°C, providing extended temperature coverage compared to the SN75154D's 0°C to 70°C range. This broader specification accommodates industrial and extended-temperature applications.

Q: What is the significance of the Last Time Buy status for the SN75154D?

A: Last Time Buy status indicates the manufacturer is discontinuing this product. Existing inventory is available for final orders, but long-term supply cannot be guaranteed. Substitution planning is necessary for designs requiring continued production beyond available stock.