SP486ET-L Equivalent & Substitute Parts

Part Overview

The SP486ET-L is a 4/0 Driver RS422/RS485 interface IC manufactured by MaxLinear, Inc., housed in a 16-SOIC package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates across a supply voltage range of 4.75V to 5.25V with a maximum data rate of 10Mbps and temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	SP486ET-L
Manufacturer	MaxLinear, Inc.
Category	Interface
Type	Driver
Protocol	RS422, RS485
Number of Drivers/Receivers	4/0
Data Rate	10Mbps
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the SP486ET-L is determined by the following critical parameters:

Protocol compatibility: RS422/RS485 interface standard
Driver/Receiver configuration: 4/0 (4 drivers, 0 receivers)
Package type: 16-SOIC surface mount
Supply voltage range: 4.75V ~ 5.25V minimum overlap
Operating temperature range: Support for -40°C ~ 85°C operation
Mounting type: Surface mount only

All substitute parts listed maintain these core electrical and mechanical specifications. Substitute parts are grouped by manufacturer and product status (Active vs. Obsolete), with packaging variants (Tube, Cut Tape & Digi-Reel) available for logistics flexibility.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Supply Voltage	Operating Temp	Package	Data Rate	Product Status	MSL
SP486ET-L	MaxLinear, Inc.	RS422, RS485	4/0	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC (0.295")	10Mbps	Obsolete	3 (168 Hours)
LTC486CSW#PBF	Analog Devices Inc.	RS422, RS485	4/0	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC (0.295")	—	Active	1 (Unlimited)
LTC486CSW#TRPBF	Analog Devices Inc.	RS422, RS485	4/0	4.75V ~ 5.25V	0°C ~ 70°C	16-SOIC (0.295")	—	Active	1 (Unlimited)
LTC486ISW#PBF	Analog Devices Inc.	RS422, RS485	4/0	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC (0.295")	—	Active	1 (Unlimited)
LTC486ISW#TRPBF	Analog Devices Inc.	RS422, RS485	4/0	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC (0.295")	—	Active	1 (Unlimited)
MAX3045BEWE+	Analog Devices Inc./Maxim Integrated	RS422, RS485	4/0	4.75V ~ 5.25V	-40°C ~ 85°C	16-SOIC (0.295")	20Mbps	Active	1 (Unlimited)
ST26C31BDR	STMicroelectronics	RS422, RS485	4/0	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC (0.154")	—	Active	3 (168 Hours)

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete SP486ET-L, the following selection criteria apply:

Temperature Range Matching: The LTC486ISW#PBF, LTC486ISW#TRPBF, and MAX3045BEWE+ maintain the full -40°C to 85°C operating range of the original part. The LTC486CSW variants operate only to 70°C and are suitable for restricted temperature applications.

Product Status: All substitute parts carry Active product status from Analog Devices Inc. or STMicroelectronics, ensuring long-term availability and supply chain stability compared to the obsolete SP486ET-L.

Compliance & Certification: All substitute parts are ROHS3 compliant. The LTC486 series and MAX3045BEWE+ feature MSL 1 (Unlimited) moisture sensitivity, providing superior handling flexibility compared to the original part's MSL 3 rating. The ST26C31BDR maintains MSL 3 compatibility for legacy manufacturing processes.

Packaging Variants: Analog Devices LTC486 parts are available in Tube (CSW#PBF, ISW#PBF) and Cut Tape & Digi-Reel (CSW#TRPBF, ISW#TRPBF) formats. The MAX3045BEWE+ is supplied in Tube packaging. STMicroelectronics ST26C31BDR is available in Cut Tape & Digi-Reel format.

Data Rate Consideration: The MAX3045BEWE+ supports 20Mbps operation, exceeding the original 10Mbps specification, providing performance headroom for bandwidth-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can LTC486CSW#PBF replace SP486ET-L in all applications? A: LTC486CSW#PBF is electrically compatible but operates only to 70°C. Use this part only in applications with maximum operating temperature of 70°C or below. For full -40°C to 85°C range, select LTC486ISW#PBF or LTC486ISW#TRPBF.

Q: What is the difference between LTC486CSW#PBF and LTC486CSW#TRPBF? A: Both parts are electrically identical. The difference is packaging format: #PBF indicates Tube packaging, while #TRPBF indicates Cut Tape & Digi-Reel format. Select based on your procurement and assembly requirements.

Q: Is MAX3045BEWE+ a direct replacement? A: MAX3045BEWE+ is functionally compatible with identical pinout, package dimensions, and electrical specifications. It provides higher data rate capability (20Mbps vs. 10Mbps) and improved moisture sensitivity rating (MSL 1 vs. MSL 3).

Q: Why does ST26C31BDR have a different package width (0.154" vs. 0.295")? A: ST26C31BDR uses a narrower 16-SO package body (3.90mm vs. 7.50mm width). While electrically compatible, PCB layout and footprint verification is required before substitution.

Q: Are all substitute parts RoHS compliant? A: All substitute parts listed are ROHS3 compliant. The original SP486ET-L product status is obsolete and RoHS compliance information is not provided.

Q: Which substitute offers the best long-term availability? A: All substitute parts carry Active product status. Analog Devices LTC486 series and MAX3045BEWE+ represent the primary recommended alternatives with established supply chains and multiple packaging options.

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