DS26LS32CMX Equivalent & Substitute Parts

Part Overview

The DS26LS32CMX 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 DS26LS32CMX operates within a 4.5V to 5.5V supply voltage range and supports industrial temperature applications from 0°C to 70°C.

Key Parameters

Parameter	DS26LS32CMX
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	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the DS26LS32CMX is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Package / Case: 16-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Number of Drivers/Receivers: 0/4
Protocol Support: RS422, RS423 minimum

Electrical Compatibility Parameters:

Voltage - Supply: 4.5V ~ 5.5V range (or compatible subset)
Receiver Hysteresis: 100 mV (main part specification)
Operating Temperature: 0°C ~ 70°C (or extended range)

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

Direct Substitutes (Functional Equivalents): Parts with identical protocol support, receiver count, and package, with compatible electrical specifications and active product status.

Upgrade Substitutes (Enhanced Specifications): Parts with extended operating temperature ranges (-40°C ~ 85°C) or improved compliance status, maintaining core functionality.

Manufacturer Recommended Substitutes (MFR Recommended): Parts officially recommended by Texas Instruments as replacements, with compatible electrical parameters and RoHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Protocol	Receivers	Hysteresis	Supply Voltage	Temp Range	Package	Status	RoHS
DS26LS32CMX	Texas Instruments	RS422, RS423	0/4	100 mV	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Obsolete	Non-compliant
AM26LS32ACDR	Texas Instruments	RS422, RS423	0/4	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant
AM26LS33ACD	Texas Instruments	-	0/4	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Last Time Buy	ROHS3 Compliant
AM26LS33ACDR	Texas Instruments	-	0/4	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant
SN75173DR	Texas Instruments	RS422, RS423, RS485	0/4	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant
AM26LS32AID	Texas Instruments	RS422, RS423	0/4	50 mV	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC	Last Time Buy	ROHS3 Compliant
AM26LS32AIDR	Texas Instruments	RS422, RS423	0/4	50 mV	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC	Active	ROHS3 Compliant
AM26C32CD	Texas Instruments	RS422, RS423	0/4	60 mV	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Last Time Buy	ROHS3 Compliant
AM26C32CDR	Texas Instruments	RS422, RS423	0/4	60 mV	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Obsolete	ROHS3 Compliant
AM26C32ID	Texas Instruments	RS422, RS423	0/4	60 mV	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Last Time Buy	ROHS3 Compliant
AM26C32IDR	Texas Instruments	RS422, RS423	0/4	60 mV	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Operating Conditions):

AM26LS32ACDR is the primary direct substitute. It maintains RS422/RS423 protocol support, identical receiver configuration (0/4), and compatible 16-SOIC packaging. The part is currently active with ROHS3 compliance. The narrower supply voltage range (4.75V ~ 5.25V versus 4.5V ~ 5.5V) and reduced hysteresis (50 mV versus 100 mV) represent tighter specifications suitable for most applications. Cut Tape and Digi-Reel packaging options support both prototype and production volumes.

For Extended Temperature Applications:

AM26LS32AIDR provides the same RS422/RS423 protocol support with extended operating temperature range (-40°C ~ 85°C). This part is active and ROHS3 compliant, making it suitable for industrial and automotive environments requiring wider temperature operation.

For Voltage Range Compatibility:

AM26C32IDR maintains the original 4.5V ~ 5.5V supply voltage specification while offering extended temperature range (-40°C ~ 85°C). This part is active and ROHS3 compliant. The 60 mV hysteresis specification differs from the original 100 mV but remains within acceptable receiver performance parameters.

For RoHS Compliance Transition:

All substitute parts listed are ROHS3 compliant, addressing regulatory requirements for new designs. The DS26LS32CMX's RoHS non-compliant status necessitates substitution for applications requiring environmental compliance certification.

Frequently Asked Questions (FAQ)

Q: Can AM26LS32ACDR directly replace DS26LS32CMX in existing designs?

A: Yes, for applications operating within 4.75V ~ 5.25V supply voltage and 0°C ~ 70°C temperature range. The 16-SOIC package, receiver count (0/4), and RS422/RS423 protocol support are identical. The reduced hysteresis (50 mV) provides improved noise margin in most applications.

Q: What is the difference between AM26LS32ACDR and AM26LS32AIDR?

A: Both parts support RS422/RS423 protocols with identical receiver configuration and packaging. AM26LS32AIDR extends the operating temperature range to -40°C ~ 85°C, making it suitable for industrial and automotive applications. AM26LS32ACDR is limited to 0°C ~ 70°C.

Q: Why does SN75173DR support RS485 in addition to RS422/RS423?

A: SN75173DR is a multi-protocol receiver capable of handling RS422, RS423, and RS485 serial communication standards. It maintains the same 0/4 receiver configuration and 16-SOIC package, providing protocol flexibility for applications requiring RS485 compatibility.

Q: What is the significance of the packaging designation "Cut Tape (CT) & Digi-Reel®"?

A: Cut Tape packaging is suitable for prototype and small-volume applications, while Digi-Reel® (tape and reel format) supports automated assembly for production volumes. Both formats contain the same component; packaging selection depends on manufacturing process requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant. The original DS26LS32CMX is RoHS non-compliant, making substitution necessary for applications requiring environmental compliance certification.

Q: Can AM26C32IDR replace DS26LS32CMX?

A: Yes, for applications requiring extended temperature operation (-40°C ~ 85°C) and the original 4.5V ~ 5.5V supply voltage range. The 60 mV receiver hysteresis differs from the original 100 mV specification but maintains functional compatibility for RS422/RS423 communication.

Q: What inventory considerations apply to these substitutes?

A: AM26C32IDR has the highest inventory (22,800 pcs), followed by AM26LS32ACDR (38,682 pcs). Parts designated "Last Time Buy" (AM26LS33ACD, AM26LS32AID, AM26C32CD, AM26C32ID) have limited availability and should be secured for long-term production requirements.

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