AM26LS31CD Equivalent & Substitute Parts

Part Overview

The AM26LS31CD is a 4-channel driver IC for RS422 and RS485 serial communication interfaces, manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is classified as Last Time Buy, indicating end-of-life status with no further production planned. Equivalent and substitute parts are necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications requiring RS422/RS485 driver functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	AM26LS31CD
Manufacturer	Texas Instruments
Category	Interface
Type	Driver
Protocol	RS422, RS485
Number of Drivers/Receivers	4/0
Package / Case	16-SOIC (0.154", 3.90mm Width)
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the AM26LS31CD is determined by the following critical parameters:

Protocol support: RS422 and RS485 compatibility
Driver/receiver configuration: 4 drivers, 0 receivers (4/0)
Package type: 16-SOIC surface mount form factor
Supply voltage range: Must accommodate 4.75V to 5.25V operation
Operating temperature range: Minimum 0°C to 70°C coverage
RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories based on electrical parameter compatibility:

Category A - Direct Electrical Equivalents (Identical Supply Voltage Range): AM26LS31CDR, DS26LS31CM/NOPB, DS26LS31CMX/NOPB, MAX3041CSE+, MAX3041CSE+T

Category B - Extended Temperature Range Substitutes (Broader Operating Conditions): DS26C31TM/NOPB, DS26C31TMX/NOPB, MAX3041ESE+, MAX3041ESE+T

Parts in Category B feature expanded supply voltage (4.5V ~ 5.5V) and extended operating temperature (-40°C ~ 85°C), providing enhanced environmental tolerance while maintaining functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Voltage - Supply	Operating Temperature	Data Rate	RoHS Status
AM26LS31CD	Texas Instruments	Last Time Buy	Tube	4.75V ~ 5.25V	0°C ~ 70°C	-	ROHS3 Compliant
AM26LS31CDR	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	4.75V ~ 5.25V	0°C ~ 70°C	-	ROHS3 Compliant
DS26C31TM/NOPB	Texas Instruments	Active	Tube	4.5V ~ 5.5V	-40°C ~ 85°C	-	ROHS3 Compliant
DS26C31TMX/NOPB	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	4.5V ~ 5.5V	-40°C ~ 85°C	-	ROHS3 Compliant
DS26LS31CM/NOPB	Texas Instruments	Obsolete	Tube	4.5V ~ 5.5V	0°C ~ 70°C	-	ROHS3 Compliant
DS26LS31CMX/NOPB	National Semiconductor	Active	-	4.5V ~ 5.5V	0°C ~ 70°C	-	-
MAX3041CSE+	Analog Devices Inc./Maxim Integrated	Active	Tube	4.75V ~ 5.25V	0°C ~ 70°C	2.5Mbps	ROHS3 Compliant
MAX3041CSE+T	Analog Devices Inc./Maxim Integrated	Active	Tape & Reel (TR)	4.75V ~ 5.25V	0°C ~ 70°C	2.5Mbps	ROHS3 Compliant
MAX3041ESE+	Analog Devices Inc./Maxim Integrated	Active	Tube	4.75V ~ 5.25V	-40°C ~ 85°C	2.5Mbps	ROHS3 Compliant
MAX3041ESE+T	Analog Devices Inc./Maxim Integrated	Active	Tape & Reel (TR)	4.75V ~ 5.25V	-40°C ~ 85°C	2.5Mbps	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: AM26LS31CDR is the preferred substitute, manufactured by Texas Instruments with identical electrical specifications and Active product status. This part maintains the same supply voltage range (4.75V ~ 5.25V) and operating temperature window (0°C ~ 70°C) as the AM26LS31CD, differing only in packaging format (Cut Tape & Digi-Reel® versus Tube). Inventory availability is significantly higher (38,110 units versus 4,858 units).

Alternative - Extended Environmental Performance: DS26C31TM/NOPB or DS26C31TMX/NOPB provide expanded operating temperature range (-40°C ~ 85°C) and broader supply voltage tolerance (4.5V ~ 5.5V), suitable for applications requiring enhanced environmental robustness. Both maintain Active product status and ROHS3 compliance.

Cross-Manufacturer Option: MAX3041CSE+, MAX3041CSE+T, MAX3041ESE+, and MAX3041ESE+T (Analog Devices Inc./Maxim Integrated) are functionally compatible alternatives with specified data rate performance (2.5Mbps). The MAX3041ESE+ and MAX3041ESE+T variants offer extended temperature range (-40°C ~ 85°C) matching the DS26C31 series.

Not Recommended: DS26LS31CM/NOPB carries Obsolete product status and should not be selected for new designs. DS26LS31CMX/NOPB lacks documented RoHS status and packaging information.

Frequently Asked Questions (FAQ)

Q: Can AM26LS31CDR be used as a direct drop-in replacement for AM26LS31CD? A: Yes. Both parts share identical electrical specifications (4.75V ~ 5.25V supply, 0°C ~ 70°C operating range), 16-SOIC package, and RS422/RS485 protocol support. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tube). PCB layout and circuit design require no modification.

Q: What is the difference between Category A and Category B substitutes? A: Category A substitutes (AM26LS31CDR, MAX3041CSE+/CSE+T) maintain the original 4.75V ~ 5.25V supply voltage and 0°C ~ 70°C temperature range. Category B substitutes (DS26C31TM/NOPB, DS26C31TMX/NOPB, MAX3041ESE+/ESE+T) expand both parameters to 4.5V ~ 5.5V and -40°C ~ 85°C, providing enhanced environmental tolerance for demanding applications.

Q: Are all substitute parts RoHS3 compliant? A: All recommended substitutes except DS26LS31CMX/NOPB carry documented ROHS3 compliance. DS26LS31CMX/NOPB lacks published RoHS certification and should be avoided for applications requiring regulatory compliance documentation.

Q: Does the MAX3041 series offer any performance advantage? A: MAX3041 variants specify 2.5Mbps data rate performance, whereas AM26LS31CD and DS26C31 series do not publish data rate specifications. For applications requiring documented bandwidth performance, MAX3041 parts provide explicit performance metrics.

Q: Can I use extended temperature range parts in standard temperature applications? A: Yes. Extended temperature range parts (DS26C31TM/NOPB, MAX3041ESE+) are fully compatible with standard temperature applications (0°C ~ 70°C). The broader operating range provides additional design margin without functional penalty.

Q: What packaging options are available for high-volume production? A: Cut Tape & Digi-Reel® (AM26LS31CDR, DS26C31TMX/NOPB) and Tape & Reel (MAX3041CSE+T, MAX3041ESE+T) formats support automated assembly. Tube packaging (AM26LS31CD, DS26C31TM/NOPB, MAX3041CSE+, MAX3041ESE+) is suitable for manual or lower-volume operations.

Q: Is cross-manufacturer substitution (Texas Instruments to Analog Devices) acceptable? A: Yes, provided electrical specifications and package compatibility are verified. MAX3041 parts maintain identical 16-SOIC packaging, RS422/RS485 protocol support, and 4/0 driver/receiver configuration. Functional equivalence is established through parameter alignment, not manufacturer identity.

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