DS26LS32ACM/NOPB Equivalent & Substitute Parts

Part Overview

The DS26LS32ACM/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 at temperatures from 0°C to 70°C. Identifying compatible alternatives ensures design continuity and supply chain flexibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	DS26LS32ACM/NOPB
Manufacturer	Texas Instruments
Category	Interface
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
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the DS26LS32ACM/NOPB is determined by the following critical parameters:

Primary Substitution Criteria:

Package / Case: 16-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Number of Drivers/Receivers: 0/4
Protocol Support: RS422, RS423 minimum
Voltage - Supply: Compatible range (4.5V ~ 5.5V or 4.75V ~ 5.25V)
Operating Temperature: 0°C ~ 70°C minimum
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into three categories:

Direct Substitutes (Electrical & Mechanical Equivalence): Parts with identical package, pin count, protocol support, and compatible electrical specifications. These include AM26LS32ACDR, AM26LS32AID, AM26LS33ACD, AM26LS33ACDR, and SN75173DR. All maintain the 16-SOIC package and 0/4 receiver configuration.

Upgrade Substitutes (Enhanced Specifications): AM26LS32AIDR provides extended operating temperature range (-40°C ~ 85°C) while maintaining identical package and electrical interface, suitable for applications requiring broader temperature performance.

Manufacturer Recommended Alternatives (Functional Equivalence): AM26C32CD, AM26C32CDR, AM26C32ID, and AM26C32IDR offer RS422/RS423 receiver functionality in the same 16-SOIC package with compatible supply voltage ranges. These parts feature 60 mV hysteresis and represent manufacturer-recommended alternatives for long-term availability.

Parameter Comparison

Part Number	Manufacturer	Protocol	Receiver Hysteresis	Voltage - Supply	Operating Temperature	Package	Product Status	Inventory
DS26LS32ACM/NOPB	Texas Instruments	RS422, RS423	100 mV	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Obsolete	1665 Pcs
AM26LS32ACDR	Texas Instruments	RS422, RS423	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Active	38682 Pcs
AM26LS32AID	Texas Instruments	RS422, RS423	50 mV	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC	Last Time Buy	4370 Pcs
AM26LS33ACD	Texas Instruments	RS422, RS423	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Last Time Buy	3300 Pcs
AM26LS33ACDR	Texas Instruments	RS422, RS423	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Active	10200 Pcs
SN75173DR	Texas Instruments	RS422, RS423, RS485	50 mV	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC	Active	1207 Pcs
AM26LS32AIDR	Texas Instruments	RS422, RS423	50 mV	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC	Active	8860 Pcs
AM26C32CD	Texas Instruments	RS422, RS423	60 mV	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Last Time Buy	3000 Pcs
AM26C32CDR	Texas Instruments	RS422, RS423	60 mV	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Obsolete	11463 Pcs
AM26C32ID	Texas Instruments	RS422, RS423	60 mV	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Last Time Buy	2909 Pcs
AM26C32IDR	Texas Instruments	RS422, RS423	60 mV	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active	22800 Pcs

Engineering Selection Recommendations

For Active Production (Recommended Primary Choice): AM26LS32ACDR is the preferred direct substitute, offering Active product status with the highest inventory availability (38,682 pcs). It maintains RS422/RS423 protocol support and 16-SOIC packaging. The reduced hysteresis (50 mV vs. 100 mV) provides improved noise margin in most applications. Supply voltage range of 4.75V ~ 5.25V is compatible with standard 5V systems.

For Extended Temperature Applications: AM26LS32AIDR provides Active status with extended operating range (-40°C ~ 85°C) and strong inventory (8,860 pcs). This upgrade option is suitable for industrial and automotive environments requiring broader temperature performance while maintaining identical package and protocol specifications.

For Long-Term Supply Assurance: AM26C32IDR offers the highest inventory level (22,800 pcs) with Active product status and extended temperature range (-40°C ~ 85°C). The AM26C32 series maintains full RS422/RS423 compatibility with identical 16-SOIC packaging and supply voltage compatibility (4.5V ~ 5.5V matches the original specification).

For RS485 Protocol Compatibility: SN75173DR supports RS422, RS423, and RS485 protocols in the same 16-SOIC package with Active status. This option is suitable for applications requiring multi-protocol flexibility, though inventory is limited (1,207 pcs).

All recommended substitutes are ROHS3 compliant and maintain the same surface mount 16-SOIC package configuration, ensuring PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can AM26LS32ACDR directly replace DS26LS32ACM/NOPB without PCB modifications?

A: Yes. Both parts use the 16-SOIC package with identical pinout and mounting type. No PCB layout changes are required. The reduced hysteresis (50 mV vs. 100 mV) improves receiver sensitivity and is functionally compatible with RS422/RS423 systems designed for the original part.

Q: What is the difference between AM26LS32ACDR and AM26LS32AIDR?

A: Both parts are electrically identical with 50 mV hysteresis and RS422/RS423 protocol support. The primary difference is operating temperature range: AM26LS32ACDR operates 0°C ~ 70°C, while AM26LS32AIDR extends to -40°C ~ 85°C. Select AM26LS32AIDR for applications requiring industrial or extended temperature performance.

Q: Why does AM26C32IDR have higher inventory than AM26LS32ACDR?

A: AM26C32IDR is part of the AM26C32 series, which is actively manufactured and widely used across multiple applications. This higher production volume results in greater inventory availability. Both parts are functionally equivalent for RS422/RS423 applications in the 16-SOIC package.

Q: Is SN75173DR compatible with RS422/RS423 systems?

A: Yes. SN75173DR supports RS422, RS423, and RS485 protocols, making it compatible with RS422/RS423 systems. The additional RS485 capability provides protocol flexibility without compromising RS422/RS423 functionality. Inventory is more limited (1,207 pcs) compared to other alternatives.

Q: What does "Last Time Buy" product status mean?

A: Last Time Buy indicates the manufacturer has announced end-of-life for that specific part number. Existing inventory may be available, but no new production is planned. For long-term designs, select parts with Active status such as AM26LS32ACDR, AM26LS32AIDR, AM26LS33ACDR, SN75173DR, or AM26C32IDR.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental and regulatory requirements of the original DS26LS32ACM/NOPB.

Q: Can I use AM26C32IDR in a design originally specified for DS26LS32ACM/NOPB?

A: Yes. AM26C32IDR is functionally equivalent with identical 16-SOIC packaging, RS422/RS423 protocol support, and compatible supply voltage range (4.5V ~ 5.5V). The 60 mV hysteresis (vs. 100 mV original) provides improved receiver sensitivity. Active product status and high inventory (22,800 pcs) make it suitable for new designs and production continuity.

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