SN75ALS193DR Equivalent & Substitute Parts

Part Overview

The SN75ALS193DR is an active RS422/RS423 receiver IC manufactured by Texas Instruments, configured with 0 drivers and 4 receivers in a 16-SOIC surface mount package. This component is classified as an interface IC and maintains Active product status with full ROHS3 compliance. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring RS422/RS423 receiver functionality within the specified electrical and mechanical parameters.

Substiute Parts

SN75ALS193DR

Texas InstrumentsIn Stock: 4651SN75ALS193DR Datasheet

Current PartRFQ

ST26C32ABDR

STMicroelectronicsIn Stock: 87612ST26C32ABDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75ALS193DR is determined by strict equivalence across the following critical parameters:

Protocol compatibility: Both main and substitute parts must support RS422 and RS423 protocols.

Receiver configuration: Identical 0/4 driver/receiver count ensures functional equivalence.

Package compatibility: 16-SOIC surface mount package with 0.154" (3.90mm) width maintains PCB layout compatibility.

Supply voltage range: Substitute parts must operate within or encompass the 4.75V ~ 5.25V supply range of the main part.

Operating temperature: Substitute parts must support the 0°C ~ 70°C operating range or a broader range that includes it.

RoHS3 compliance: All substitute parts must maintain ROHS3 compliance status for regulatory consistency.

The ST26C32ABDR from STMicroelectronics meets these substitution criteria through identical protocol support, receiver configuration, and package specifications, with extended operating temperature range and supply voltage tolerance.

Parameter Comparison

Engineering Selection Recommendations

Both the SN75ALS193DR and ST26C32ABDR maintain Active product status with ROHS3 compliance, supporting long-term design viability and regulatory consistency. The ST26C32ABDR provides extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) and broader supply voltage tolerance (4.5V ~ 5.5V versus 4.75V ~ 5.25V), offering enhanced environmental flexibility. The receiver hysteresis differential (60 mV versus 120 mV) reflects design variations between manufacturers but does not preclude functional substitution within the specified RS422/RS423 protocol framework. Selection between these parts should be based on specific application temperature and supply voltage requirements, with both components providing equivalent receiver functionality and identical package compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ST26C32ABDR directly replace the SN75ALS193DR on existing PCBs?

A: Yes. Both components use identical 16-SOIC (0.154", 3.90mm Width) surface mount packages with matching pin configurations for RS422/RS423 receiver applications. No PCB layout modifications are required.

Q: What is the significance of the receiver hysteresis difference between these parts?

A: Receiver hysteresis (120 mV for SN75ALS193DR, 60 mV for ST26C32ABDR) defines the voltage differential required to switch receiver output states. Both values are within standard RS422/RS423 specifications. The ST26C32ABDR's lower hysteresis may provide improved noise immunity in certain signal environments but does not affect protocol compatibility.

Q: Are there supply voltage compatibility concerns when substituting?

A: The ST26C32ABDR operates across 4.5V ~ 5.5V, which encompasses and exceeds the SN75ALS193DR's 4.75V ~ 5.25V range. Systems designed for the SN75ALS193DR will operate within the ST26C32ABDR's supply specifications without modification.

Q: Does the extended operating temperature range of the ST26C32ABDR affect substitution suitability?

A: The ST26C32ABDR's -40°C ~ 85°C range exceeds the SN75ALS193DR's 0°C ~ 70°C range. For applications operating within 0°C ~ 70°C, both parts are functionally equivalent. The ST26C32ABDR provides additional thermal margin for extended-temperature applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN75ALS193DR and ST26C32ABDR maintain ROHS3 compliance status, ensuring regulatory consistency and environmental compliance across substitution scenarios.

Q: What is the data rate specification for these receiver ICs?

A: The SN75ALS193DR does not specify a data rate parameter in the provided documentation. The ST26C32ABDR specifies 20 Mbps. Both components support RS422/RS423 protocol operation within their respective electrical specifications.