DS26LS31CM Equivalent & Substitute Parts

Part Overview

The DS26LS31CM is a 4-channel driver interface IC for RS422 and RS485 serial communication protocols, manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates within a 4.5V to 5.5V supply voltage range and supports industrial communication standards requiring robust signal transmission over extended distances.

Substiute Parts

DS26LS31CM

Texas InstrumentsIn Stock: 9068DS26LS31CM Datasheet

Current PartRFQ

DS26LS31CM/NOPB

Texas InstrumentsIn Stock: 4449DS26LS31CM/NOPB Datasheet

DirectRFQ

ISL32172EIBZ

Renesas Electronics CorporationIn Stock: 3205ISL32172EIBZ Datasheet

MFR RecommendedRFQ

MAX3042BCSE+

Analog Devices Inc./Maxim IntegratedIn Stock: 2207MAX3042BCSE+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS26LS31CM are qualified based on the following critical parameters that determine functional and mechanical compatibility:

• Protocol Support: RS422 and RS485 serial communication standards
• Driver/Receiver Configuration: 4-channel driver, 0-channel receiver (4/0)
• Package Type: 16-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm width)
• Supply Voltage Range: Compatibility within or overlapping the 4.5V to 5.5V operating window
• Operating Temperature Range: Support for the 0°C to 70°C industrial temperature band
• Mounting Technology: Surface mount technology on standard PCB layouts

The substitute parts identified maintain electrical equivalence in protocol implementation and mechanical compatibility in package form factor. Variations in data rate, extended temperature ranges, and compliance certifications represent enhancements or different product generations rather than functional incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

DS26LS31CM/NOPB (Texas Instruments): This variant represents a direct equivalent with identical electrical specifications and package form factor. It maintains the same supply voltage range and operating temperature window as the original DS26LS31CM. The primary distinction is ROHS3 compliance certification, making this option suitable for applications requiring modern regulatory compliance while preserving the original design parameters.

ISL32172EIBZ (Renesas Electronics): This substitute provides active product status with extended operating temperature range (-40°C to 125°C) and higher data rate capability (32Mbps). The supply voltage range extends to 3V minimum, offering broader compatibility with lower-voltage system designs. ROHS3 compliance and REACH unaffected status support modern manufacturing standards. The MSL rating of 3 requires adherence to moisture control protocols during storage and handling.

MAX3042BCSE+ (Analog Devices Inc./Maxim Integrated): This substitute maintains the original operating temperature range (0°C to 70°C) and MSL rating (1, Unlimited), minimizing handling and storage requirements. The supply voltage range is narrower (4.75V to 5.25V) compared to the original specification. Data rate is specified at 20Mbps. ROHS3 compliance and active product status support current manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can DS26LS31CM/NOPB be used as a direct replacement for DS26LS31CM?

A: Yes. DS26LS31CM/NOPB maintains identical electrical specifications, package form factor, and pin configuration. The primary difference is ROHS3 compliance certification. Both parts operate within the same 4.5V to 5.5V supply voltage range and 0°C to 70°C temperature band.

Q: What are the key differences between ISL32172EIBZ and the original DS26LS31CM?

A: ISL32172EIBZ offers extended operating temperature range (-40°C to 125°C versus 0°C to 70°C), higher data rate (32Mbps), and lower minimum supply voltage (3V versus 4.5V). The MSL rating increases from 1 to 3, requiring moisture control during storage. All parts maintain 16-SOIC package compatibility and RS422/RS485 protocol support.

Q: Is MAX3042BCSE+ suitable for designs requiring the full 4.5V to 5.5V supply voltage range?

A: MAX3042BCSE+ operates within 4.75V to 5.25V, which overlaps but does not fully cover the original 4.5V to 5.5V range. Applications requiring operation below 4.75V or above 5.25V should use DS26LS31CM/NOPB or ISL32172EIBZ instead.

Q: Are all substitute parts available in the same 16-SOIC package?

A: Yes. All substitute parts use the 16-SOIC (0.154", 3.90mm width) surface mount package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What compliance certifications apply to each substitute part?

A: DS26LS31CM/NOPB, ISL32172EIBZ, and MAX3042BCSE+ all carry ROHS3 compliance and REACH unaffected status. The original DS26LS31CM is RoHS non-compliant. All parts are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Q: Does ISL32172EIBZ require special handling due to its MSL rating?

A: ISL32172EIBZ carries MSL 3 (168 Hours), requiring moisture control during storage and handling. Parts must be stored in dry conditions and used within 168 hours of exposure to ambient humidity. DS26LS31CM/NOPB and MAX3042BCSE+ carry MSL 1 (Unlimited), requiring no special moisture management.