DS26C32ATM RS422/RS423 Receiver IC - Equivalent & Substitute Parts

Part Overview

The DS26C32ATM is a 0/4 Receiver IC for RS422 and RS423 serial communication protocols, manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The receiver operates across a 4.5V to 5.5V supply range with a 60 mV receiver hysteresis specification, suitable for industrial and telecommunications applications requiring reliable differential signal reception.

Substiute Parts

DS26C32ATM

Texas InstrumentsIn Stock: 6998DS26C32ATM Datasheet

Current PartRFQ

DS26C32ATM/NOPB

Texas InstrumentsIn Stock: 1330DS26C32ATM/NOPB Datasheet

DirectRFQ

AM26C32ID

Texas InstrumentsIn Stock: 2942AM26C32ID Datasheet

MFR RecommendedRFQ

DS34C86TM/NOPB

Texas InstrumentsIn Stock: 4013DS34C86TM/NOPB Datasheet

Parametric EquivalentRFQ

ST26C32ABDR

STMicroelectronicsIn Stock: 87612ST26C32ABDR Datasheet

DirectRFQ

SP26LV432CN-L

MaxLinear, Inc.In Stock: 2877SP26LV432CN-L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DS26C32ATM is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Protocol support: RS422 and/or RS423
• Receiver configuration: 0/4 (four receivers, no drivers)
• Receiver hysteresis: 60 mV
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C
• Package type: 16-SOIC surface mount
• Pin-compatible footprint: 16-SOIC (0.154", 3.90mm Width)

Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Manufacturer Equivalent: DS26C32ATM/NOPB (Texas Instruments) - identical electrical specifications with active product status and improved RoHS compliance.

Manufacturer Recommended Equivalent: AM26C32ID (Texas Instruments) - meets all critical parameters with last-time-buy status and RoHS3 compliance.

Parametric Equivalent: DS34C86TM/NOPB (Texas Instruments) - alternative base product number with identical electrical and mechanical specifications and active status.

Cross-Manufacturer Equivalent: ST26C32ABDR (STMicroelectronics) - meets all critical parameters with enhanced data rate specification (20 Mbps) and high inventory availability.

Limited Compatibility Substitute: SP26LV432CN-L (MaxLinear, Inc.) - supports RS422 protocol with modified supply voltage (3.3V), reduced operating temperature range (0°C ~ 70°C), and higher data rate (50 Mbps). This part requires design review for voltage and temperature compatibility.

Parameter Comparison

Engineering Selection Recommendations

Preferred Primary Substitute: DS26C32ATM/NOPB (Texas Instruments)

This part is the direct equivalent with identical electrical and mechanical specifications. It maintains active product status and achieves ROHS3 compliance, making it suitable for new designs and production continuity. Selection of this part eliminates design risk and ensures pin-for-pin compatibility.

Secondary Substitute: DS34C86TM/NOPB (Texas Instruments)

This parametric equivalent offers active product status with identical electrical specifications and package configuration. The alternative base product number (DS34C86 versus DS26C32) does not affect functional compatibility for RS422/RS423 receiver applications.

Cross-Manufacturer Alternative: ST26C32ABDR (STMicroelectronics)

This part meets all critical electrical and mechanical parameters with the advantage of high inventory availability (87,600 units). The specified 20 Mbps data rate exceeds the original part's unspecified data rate capability. ROHS3 compliance and active product status support long-term supply chain stability.

Limited Compatibility Option: SP26LV432CN-L (MaxLinear, Inc.)

This part supports RS422 protocol with modified electrical specifications. The 3.3V supply voltage requirement and reduced operating temperature range (0°C ~ 70°C) necessitate design review and potential power supply modifications. The 50 Mbps data rate provides enhanced performance. Selection requires confirmation that the application environment and power architecture support these parameter changes.

Frequently Asked Questions (FAQ)

Q: Can DS26C32ATM/NOPB be used as a direct replacement for DS26C32ATM?

A: Yes. DS26C32ATM/NOPB is the direct manufacturer equivalent with identical electrical specifications, package configuration, and pin assignment. The primary differences are active product status and improved RoHS3 compliance.

Q: What is the difference between DS34C86TM/NOPB and DS26C32ATM?

A: Both parts are parametric equivalents with identical receiver configuration (0/4), protocol support (RS422/RS423), hysteresis (60 mV), supply voltage (4.5V ~ 5.5V), operating temperature (-40°C ~ 85°C), and 16-SOIC package. The base product number differs (DS34C86 versus DS26C32), but electrical and mechanical compatibility is maintained.

Q: Is ST26C32ABDR compatible with DS26C32ATM in terms of pinout and package?

A: Yes. ST26C32ABDR uses the same 16-SOIC package footprint and maintains pin-for-pin compatibility. All critical electrical parameters (receiver configuration, protocol support, hysteresis, supply voltage, and operating temperature) are identical. The specified 20 Mbps data rate represents an enhancement over the original part.

Q: Can SP26LV432CN-L replace DS26C32ATM without design modifications?

A: No. SP26LV432CN-L requires design review due to modified electrical specifications. The 3.3V supply voltage differs from the original 4.5V ~ 5.5V requirement, and the operating temperature range is reduced to 0°C ~ 70°C. Applications requiring the full -40°C ~ 85°C temperature range or 5V supply operation cannot use this part without circuit modifications.

Q: What RoHS compliance status should be considered for new designs?

A: New designs should prioritize ROHS3-compliant parts. DS26C32ATM/NOPB, AM26C32ID, DS34C86TM/NOPB, and ST26C32ABDR all meet ROHS3 compliance. The original DS26C32ATM is RoHS non-compliant and should not be selected for new production.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. ST26C32ABDR offers the highest inventory availability (87,600 units), followed by AM26C32ID (2,909 units) and DS34C86TM/NOPB (3,967 units). DS26C32ATM/NOPB has 1,312 units available. Inventory levels should be evaluated against production volume and supply chain requirements.

Q: What is the significance of "Last Time Buy" product status?

A: Parts designated as "Last Time Buy" (AM26C32ID and SP26LV432CN-L) indicate that the manufacturer will discontinue production after a specified date. These parts should be selected only when inventory requirements can be met before discontinuation, or when transitioning to active-status alternatives is planned.