AM26LS31CDRE4 Equivalent & Substitute Parts

Part Overview

The AM26LS31CDRE4 is a 4-driver/0-receiver RS422/RS485 interface driver IC manufactured by Texas Instruments, packaged in 16-SOIC surface mount configuration. This part is classified as Last Time Buy, indicating discontinued production with limited remaining inventory. Equivalent and substitute parts are necessary to ensure design continuity and long-term supply chain reliability for applications requiring RS422/RS485 driver functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	AM26LS31CDRE4
Manufacturer	Texas Instruments
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 is determined by the following critical parameters:

Package / Case: All substitutes must use 16-SOIC (0.154", 3.90mm Width) surface mount configuration for PCB compatibility
Protocol: All substitutes must support RS422 and RS485 protocols
Number of Drivers/Receivers: All substitutes must provide 4 drivers and 0 receivers (4/0 configuration)
Mounting Type: All substitutes must be surface mount
Electrical Compatibility: Supply voltage and operating temperature ranges determine functional interchangeability

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

Category 1 - Direct Electrical Match (4.75V ~ 5.25V, 0°C ~ 70°C):

AM26LS31CDR (Texas Instruments, Active status)
DS26LS31CM/NOPB (Texas Instruments, Obsolete status)
DS26LS31CMX/NOPB (National Semiconductor, Active status)
MAX3041CSE+ (Analog Devices Inc./Maxim Integrated, Active status)
MAX3041CSE+T (Analog Devices Inc./Maxim Integrated, Active status)

Category 2 - Extended Operating Range (4.5V ~ 5.5V, -40°C ~ 85°C):

DS26C31TM/NOPB (Texas Instruments, Active status)
DS26C31TMX/NOPB (Texas Instruments, Active status)
MAX3041ESE+ (Analog Devices Inc./Maxim Integrated, Active status)
MAX3041ESE+T (Analog Devices Inc./Maxim Integrated, Active status)

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply	Operating Temperature	Packaging	Data Rate	Inventory (Pcs)
AM26LS31CDRE4	Texas Instruments	Last Time Buy	4.75V ~ 5.25V	0°C ~ 70°C	Tape & Reel (TR)	-	1150
AM26LS31CDR	Texas Instruments	Active	4.75V ~ 5.25V	0°C ~ 70°C	Cut Tape (CT) & Digi-Reel®	-	38110
DS26C31TM/NOPB	Texas Instruments	Active	4.5V ~ 5.5V	-40°C ~ 85°C	Tube	-	1525
DS26C31TMX/NOPB	Texas Instruments	Active	4.5V ~ 5.5V	-40°C ~ 85°C	Cut Tape (CT) & Digi-Reel®	-	20338
DS26LS31CM/NOPB	Texas Instruments	Obsolete	4.5V ~ 5.5V	0°C ~ 70°C	Tube	-	4415
DS26LS31CMX/NOPB	National Semiconductor	Active	4.5V ~ 5.5V	0°C ~ 70°C	-	-	8413
MAX3041CSE+	Analog Devices Inc./Maxim Integrated	Active	4.75V ~ 5.25V	0°C ~ 70°C	Tube	2.5Mbps	1332
MAX3041CSE+T	Analog Devices Inc./Maxim Integrated	Active	4.75V ~ 5.25V	0°C ~ 70°C	Tape & Reel (TR)	2.5Mbps	2000
MAX3041ESE+	Analog Devices Inc./Maxim Integrated	Active	4.75V ~ 5.25V	-40°C ~ 85°C	Tube	2.5Mbps	12700
MAX3041ESE+T	Analog Devices Inc./Maxim Integrated	Active	4.75V ~ 5.25V	-40°C ~ 85°C	Tape & Reel (TR)	2.5Mbps	674

Engineering Selection Recommendations

Primary Recommendation - Identical Electrical Parameters: AM26LS31CDR is the preferred substitute, offering identical electrical specifications (4.75V ~ 5.25V, 0°C ~ 70°C) with Active product status and significantly higher inventory availability (38,110 units). This part maintains full compatibility with existing designs without thermal or voltage margin adjustments.

Alternative - Extended Operating Range: DS26C31TMX/NOPB provides extended supply voltage range (4.5V ~ 5.5V) and operating temperature range (-40°C ~ 85°C) with Active status and substantial inventory (20,338 units). This option is suitable for applications requiring wider environmental operating conditions.

Maxim Integrated Options: MAX3041CSE+T and MAX3041ESE+T offer Tape & Reel packaging matching the original AM26LS31CDRE4 format. MAX3041ESE+T provides extended temperature range (-40°C ~ 85°C) with the highest inventory availability among extended-range parts (12,700 units).

Avoid: DS26LS31CM/NOPB and DS26LS31CMX/NOPB are classified as Obsolete or have uncertain long-term availability and should not be selected for new designs requiring sustained supply.

Frequently Asked Questions (FAQ)

Q: Can AM26LS31CDR directly replace AM26LS31CDRE4? A: Yes. Both parts share identical electrical specifications (4.75V ~ 5.25V supply, 0°C ~ 70°C operating temperature), 4/0 driver/receiver configuration, and 16-SOIC package. The difference is packaging format: AM26LS31CDR uses Cut Tape & Digi-Reel® while AM26LS31CDRE4 uses Tape & Reel. Both are surface mount compatible.

Q: What is the difference between Category 1 and Category 2 substitutes? A: Category 1 substitutes maintain the original electrical specifications (4.75V ~ 5.25V, 0°C ~ 70°C). Category 2 substitutes offer extended voltage range (4.5V ~ 5.5V) and extended operating temperature range (-40°C ~ 85°C), providing greater environmental tolerance but requiring verification that the application does not depend on the narrower original specifications.

Q: Are Maxim Integrated MAX3041 parts compatible with Texas Instruments AM26LS31 parts? A: Yes, for applications within the overlapping electrical specifications. MAX3041CSE+ and MAX3041CSE+T match the original 4.75V ~ 5.25V and 0°C ~ 70°C parameters. MAX3041ESE+ and MAX3041ESE+T extend to -40°C ~ 85°C. All maintain 4/0 driver/receiver configuration and 16-SOIC package.

Q: What does "Last Time Buy" status mean for AM26LS31CDRE4? A: Last Time Buy indicates the manufacturer has discontinued production. Remaining inventory (1,150 units) represents the final available stock. Substitution is necessary for long-term supply assurance.

Q: Does packaging format affect electrical performance? A: No. Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and Tube packaging formats are logistics and handling variations only. Electrical performance and functionality are identical across packaging options for the same part number base.

Q: Can I use DS26C31TMX/NOPB in place of AM26LS31CDRE4 in a design with tight voltage tolerances? A: DS26C31TMX/NOPB has a wider supply voltage range (4.5V ~ 5.5V) compared to the original (4.75V ~ 5.25V). If your design operates at the lower voltage boundary (below 4.75V), DS26C31TMX/NOPB will function, but AM26LS31CDR or MAX3041CSE+T are preferred for designs requiring the narrower original specification.

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