DS26LS32CM/NOPB Equivalent & Substitute Parts

Part Overview

The DS26LS32CM/NOPB 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 ongoing system support and new designs. The receiver features 100 mV hysteresis and operates across a 4.5V to 5.5V supply voltage range with a 0°C to 70°C operating temperature specification.

Key Parameters

Parameter	DS26LS32CM/NOPB
Manufacturer	Texas Instruments
Type	Receiver
Protocol	RS422, RS423
Number of Drivers/Receivers	0/4
Receiver Hysteresis	100 mV
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the DS26LS32CM/NOPB is determined by the following critical parameters:

Core Compatibility Criteria:

Package type: 16-SOIC surface mount form factor
Receiver configuration: 0/4 (4 receivers, 0 drivers)
Protocol support: RS422 and/or RS423 compatibility
Supply voltage range: Must accommodate 4.5V to 5.5V operation
Operating temperature: Minimum 0°C to 70°C range

Substitution Categories:

Direct Substitutes maintain identical electrical and mechanical specifications with compatible receiver hysteresis (50-100 mV range) and matching supply voltage windows. These parts are pin-compatible and functionally equivalent.

Upgrade Substitutes extend the operating temperature range to -40°C to 85°C while maintaining all other electrical parameters, providing enhanced performance for wider environmental conditions.

Manufacturer Recommended Substitutes offer compatible receiver functionality with minor parameter variations (hysteresis 60 mV, supply voltage 4.5V-5.5V) and represent the manufacturer's preferred alternatives for new designs.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Receiver Hysteresis	Voltage - Supply	Operating Temperature	Package	Packaging Type
DS26LS32CM/NOPB	Texas Instruments	Obsolete	RS422, RS423	100 mV	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	-
AM26LS32ACDR	Texas Instruments	Active	RS422, RS423	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Cut Tape (CT) & Digi-Reel®
AM26LS32AID	Texas Instruments	Last Time Buy	RS422, RS423	50 mV	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC	Tube
AM26LS33ACD	Texas Instruments	Last Time Buy	-	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Tube
AM26LS33ACDR	Texas Instruments	Active	-	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Cut Tape (CT) & Digi-Reel®
SN75173DR	Texas Instruments	Active	RS422, RS423, RS485	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Cut Tape (CT) & Digi-Reel®
AM26LS32AIDR	Texas Instruments	Active	RS422, RS423	50 mV	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC	Cut Tape (CT) & Digi-Reel®
AM26C32CD	Texas Instruments	Last Time Buy	RS422, RS423	60 mV	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Tube
AM26C32CDR	Texas Instruments	Obsolete	RS422, RS423	60 mV	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Tape & Reel (TR)
AM26C32ID	Texas Instruments	Last Time Buy	RS422, RS423	60 mV	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Tube
AM26C32IDR	Texas Instruments	Active	RS422, RS423	60 mV	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

For Active Production and New Designs:

AM26LS32AIDR is the preferred upgrade substitute. It maintains RS422/RS423 protocol compatibility, extends operating temperature to -40°C to 85°C, and carries Active product status with high inventory availability (8,860 pcs). This part is available in Cut Tape & Digi-Reel® packaging suitable for automated assembly.

AM26C32IDR provides an alternative with Active status, extended temperature range (-40°C to 85°C), and higher inventory (22,800 pcs). It maintains the original 4.5V to 5.5V supply voltage specification and RS422/RS423 protocol support with 60 mV hysteresis.

For Existing System Support:

AM26LS32ACDR offers direct compatibility with Active status and standard commercial temperature range (0°C to 70°C). With 38,682 pcs in stock, this part ensures supply continuity for maintenance and repair applications.

SN75173DR provides extended protocol support (RS422, RS423, RS485) while maintaining Active status and commercial temperature operation. This part is suitable for systems requiring multi-protocol flexibility.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original part's regulatory requirements. Moisture Sensitivity Level (MSL) remains at 1 (Unlimited) across all alternatives, eliminating special handling requirements.

Frequently Asked Questions (FAQ)

Q: Can AM26LS32ACDR directly replace DS26LS32CM/NOPB in existing designs?

A: Yes. Both parts share identical 16-SOIC packaging, 0/4 receiver configuration, and RS422/RS423 protocol support. The supply voltage window differs slightly (4.75V-5.25V vs. 4.5V-5.5V), but this remains compatible with standard 5V systems. Receiver hysteresis is lower (50 mV vs. 100 mV), which improves noise immunity.

Q: What is the difference between AM26LS32AIDR and AM26LS32ACDR?

A: Both parts are from the AM26LS32 base product family with identical electrical specifications. The primary difference is operating temperature range: AM26LS32AIDR extends to -40°C to 85°C (industrial grade), while AM26LS32ACDR operates 0°C to 70°C (commercial grade). AM26LS32AIDR is Active status; AM26LS32ACDR is also Active. Choose based on your system's environmental requirements.

Q: Why do some substitutes show different receiver hysteresis values?

A: Receiver hysteresis determines the voltage differential required to switch receiver outputs. The DS26LS32CM/NOPB specifies 100 mV, while most substitutes offer 50-60 mV. Lower hysteresis improves sensitivity but may increase susceptibility to noise in marginal signal conditions. Both ranges are within acceptable RS422/RS423 specifications for standard applications.

Q: Is AM26C32IDR compatible with DS26LS32CM/NOPB?

A: Yes, with considerations. Both maintain 16-SOIC packaging, 0/4 receiver configuration, and RS422/RS423 protocol support. AM26C32IDR matches the original 4.5V-5.5V supply voltage and extends temperature to -40°C to 85°C. The 60 mV hysteresis is intermediate between the original 100 mV and the 50 mV AM26LS32 variants. This part is suitable for designs requiring extended temperature operation.

Q: What packaging options are available for production quantities?

A: Cut Tape (CT) & Digi-Reel® packaging is standard for high-volume automated assembly (AM26LS32ACDR, AM26LS32AIDR, AM26C32IDR, SN75173DR). Tube packaging is available for lower volumes or manual assembly (AM26LS32AID, AM26LS33ACD, AM26C32CD, AM26C32ID). Tape & Reel (TR) is available for specific parts (AM26C32CDR).

Q: Can SN75173DR be used as a substitute?

A: Yes. SN75173DR maintains 16-SOIC packaging and 0/4 receiver configuration with Active product status. It extends protocol support to include RS485 in addition to RS422/RS423, making it suitable for multi-protocol systems. Supply voltage (4.75V-5.25V) and operating temperature (0°C-70°C) are compatible with standard commercial applications.

Q: Which substitute offers the best long-term availability?

A: AM26C32IDR provides the highest inventory (22,800 pcs) with Active product status, ensuring sustained availability for ongoing production. AM26LS32AIDR (8,860 pcs) and AM26LS32ACDR (38,682 pcs) also maintain Active status with strong stock levels. Parts marked Last Time Buy or Obsolete should be evaluated for long-term supply planning.

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