DS26C31TMX Equivalent & Substitute Parts

Part Overview

The DS26C31TMX is a quad driver interface IC for RS422 and RS485 serial communication protocols, manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and production continuity. The DS26C31TMX provides 4 drivers with 0 receivers, operating across a 4.5V to 5.5V supply voltage range and supporting industrial temperature ranges from -40°C to 85°C.

Substiute Parts

DS26C31TMX

Texas InstrumentsIn Stock: 24078DS26C31TMX Datasheet

Current PartRFQ

DS26C31TMX/NOPB

Texas InstrumentsIn Stock: 20390DS26C31TMX/NOPB Datasheet

DirectRFQ

AM26C31IDR

Texas InstrumentsIn Stock: 20198AM26C31IDR Datasheet

MFR RecommendedRFQ

ST26C31BDR

STMicroelectronicsIn Stock: 30523ST26C31BDR Datasheet

DirectRFQ

ISL32172EIBZ

Renesas Electronics CorporationIn Stock: 3205ISL32172EIBZ Datasheet

MFR RecommendedRFQ

ISL32172EIBZ-T

Renesas Electronics CorporationIn Stock: 1382ISL32172EIBZ-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS26C31TMX is determined by the following critical parameters:

• Driver/Receiver Configuration: 4/0 (4 drivers, 0 receivers)
• Protocol Support: RS422 and/or RS485
• Package Type: 16-SOIC surface mount form factor
• Supply Voltage Range: Minimum 4.5V to 5.5V compatibility
• Operating Temperature Range: -40°C to 85°C minimum
• Mounting Technology: Surface mount only

Substitute parts must maintain electrical and mechanical compatibility across these parameters. Parts are grouped into two categories: direct equivalents from Texas Instruments with identical specifications, and cross-manufacturer alternatives that meet the same functional requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: DS26C31TMX/NOPB

The DS26C31TMX/NOPB is the direct active equivalent from Texas Instruments. It maintains identical electrical specifications (4.5V to 5.5V supply, -40°C to 85°C operating range, 4/0 driver configuration) and package form factor. The primary distinction is product status (active versus obsolete) and RoHS3 compliance. This part is the preferred choice for design continuity and supply chain stability.

Secondary Recommendation: AM26C31IDR

The AM26C31IDR is an active Texas Instruments alternative with identical supply voltage and operating temperature specifications. It maintains the 4/0 driver configuration and 16-SOIC package compatibility. This part provides an additional sourcing option within the Texas Instruments product family.

Cross-Manufacturer Alternative: ST26C31BDR

The ST26C31BDR from STMicroelectronics meets all core electrical and mechanical requirements: 4/0 driver configuration, RS422/RS485 protocol support, 4.5V to 5.5V supply voltage, -40°C to 85°C operating temperature, and 16-SOIC package. This part is active and RoHS3 compliant. The moisture sensitivity level is MSL 3 (168 hours) compared to MSL 1 for the primary recommendation.

Enhanced Performance Alternative: ISL32172EIBZ and ISL32172EIBZ-T

The ISL32172EIBZ and ISL32172EIBZ-T from Renesas Electronics Corporation provide extended operating temperature range (-40°C to 125°C) and wider supply voltage compatibility (3V to 5.5V). Both parts support RS422/RS485 protocols with 4/0 driver configuration in 16-SOIC packages. The ISL32172EIBZ is supplied in tube packaging, while the ISL32172EIBZ-T is supplied in tape and reel format. These parts include a specified data rate of 32Mbps and are RoHS3 compliant with MSL 3 rating.

Frequently Asked Questions (FAQ)

Q: Can DS26C31TMX/NOPB be used as a direct replacement for DS26C31TMX?

A: Yes. The DS26C31TMX/NOPB is the active production equivalent with identical electrical specifications and 16-SOIC package. The primary difference is product status and RoHS3 compliance certification.

Q: What is the significance of the driver/receiver configuration (4/0)?

A: The 4/0 designation indicates 4 driver channels and 0 receiver channels. Substitute parts must maintain this exact configuration to ensure functional compatibility in the application circuit.

Q: Are the ISL32172EIBZ variants pin-compatible with the DS26C31TMX?

A: Both the ISL32172EIBZ and ISL32172EIBZ-T maintain the 16-SOIC package form factor and support RS422/RS485 protocols with 4/0 driver configuration. Pin compatibility must be verified against specific application schematics, as protocol implementation details may differ between manufacturers.

Q: What is the difference between ISL32172EIBZ and ISL32172EIBZ-T?

A: Both parts are electrically identical. The primary difference is packaging: ISL32172EIBZ is supplied in tube format, while ISL32172EIBZ-T is supplied in tape and reel format. Selection depends on production volume and assembly line requirements.

Q: Why does ST26C31BDR have MSL 3 rating while others have MSL 1?

A: Moisture sensitivity level reflects the maximum time a component can be exposed to specified humidity conditions before soldering. MSL 3 (168 hours) is more restrictive than MSL 1 (unlimited). This affects storage and handling procedures but does not impact electrical performance.

Q: Can I use ISL32172EIBZ in applications requiring -40°C to 85°C operation only?

A: Yes. The ISL32172EIBZ supports -40°C to 125°C operation, which exceeds the -40°C to 85°C requirement. The extended temperature range does not create compatibility issues for applications with lower temperature requirements.

Q: What is the impact of RoHS compliance on part selection?

A: RoHS3 compliance indicates the part meets current environmental regulations for lead and hazardous substance restrictions. The DS26C31TMX is RoHS non-compliant, while all active substitutes are RoHS3 compliant. For new designs and regulated applications, RoHS3 compliant parts are required.