SN75154DR Equivalent & Substitute Parts

Part Overview

The SN75154DR is a 0/4 Receiver RS232 interface IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as Last Time Buy, indicating discontinued production with limited remaining inventory. The SN75154DR operates within the 4.5V to 5.5V supply voltage range and supports RS232 protocol communication with a receiver hysteresis of 3.3V across an operating temperature range of 0°C to 70°C.

Identifying equivalent and substitute parts is necessary due to the Last Time Buy status, which restricts long-term availability. Alternative components must maintain electrical compatibility while accommodating potential differences in package form factor, functional capability, and operating specifications.

Substiute Parts

SN75154DR

Texas InstrumentsIn Stock: 1852SN75154DR Datasheet

Current PartRFQ

TRS208IDBR

Texas InstrumentsIn Stock: 2494TRS208IDBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75154DR is determined by the following critical parameters:

Electrical Compatibility Requirements:

• RS232 protocol support (mandatory)
• Supply voltage range: 4.5V to 5.5V (mandatory)
• Receiver functionality with compatible hysteresis characteristics

Mechanical Compatibility Requirements:

• Surface mount technology
• Package footprint compatibility or acceptable redesign accommodation

Regulatory & Compliance Requirements:

• ROHS3 compliance
• REACH unaffected status
• EAR99 classification

The TRS208IDBR qualifies as a substitute based on matching supply voltage (4.5V ~ 5.5V), RS232 protocol support, surface mount technology, and identical regulatory compliance (ROHS3, REACH unaffected, EAR99). However, the TRS208IDBR provides enhanced functionality as a 4/4 full duplex transceiver compared to the 0/4 receiver configuration of the SN75154DR, with an extended operating temperature range and improved receiver hysteresis specification.

Parameter Comparison

Engineering Selection Recommendations

Selection between the SN75154DR and TRS208IDBR depends on application requirements and design constraints:

SN75154DR Selection Criteria:

• Last Time Buy status limits future procurement
• Suitable only for existing designs with committed inventory
• Restricted to applications requiring receiver-only functionality
• Operating temperature range limited to 0°C to 70°C

TRS208IDBR Selection Criteria:

• Active product status ensures ongoing availability
• Provides full duplex transceiver capability (4/4 drivers/receivers) versus receiver-only (0/4)
• Extended operating temperature range (-40°C to 85°C) accommodates broader environmental conditions
• Package change from 16-SOIC to 24-SSOP requires PCB layout modification
• Suitable for new designs and long-term production requirements
• ROHS3 compliance and REACH unaffected status maintained

Both components meet identical regulatory requirements (ROHS3, REACH unaffected, EAR99) and operate within the same supply voltage range (4.5V ~ 5.5V).

Frequently Asked Questions (FAQ)

Q: Can the TRS208IDBR directly replace the SN75154DR without PCB modification?

A: No. The TRS208IDBR uses a 24-SSOP package (0.209", 5.30mm width) compared to the SN75154DR's 16-SOIC package (0.154", 3.90mm width). PCB layout redesign is required to accommodate the different pin count (24 pins versus 16 pins) and package footprint.

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

A: The SN75154DR is a receiver-only device (0/4 configuration), while the TRS208IDBR is a full duplex transceiver (4/4 configuration). The TRS208IDBR provides both driver and receiver functionality, enabling bidirectional RS232 communication on a single IC.

Q: Are the supply voltage requirements identical?

A: Yes. Both the SN75154DR and TRS208IDBR operate within the 4.5V to 5.5V supply voltage range, ensuring electrical compatibility in this parameter.

Q: Does the TRS208IDBR support the same RS232 protocol?

A: Yes. Both components support RS232 protocol and are manufactured by Texas Instruments with identical regulatory compliance (ROHS3, REACH unaffected, EAR99).

Q: What is the impact of the extended operating temperature range in the TRS208IDBR?

A: The TRS208IDBR operates from -40°C to 85°C, compared to the SN75154DR's 0°C to 70°C range. This extended range accommodates industrial and automotive applications requiring broader temperature performance.

Q: Why is the SN75154DR classified as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued production. Existing inventory is available for a limited time, after which the component will no longer be obtainable. New designs should transition to active alternatives such as the TRS208IDBR.