SP481EEN-L Equivalent & Substitute Parts

Part Overview

The SP481EEN-L is a half-duplex RS422/RS485 transceiver interface IC manufactured by MaxLinear, Inc., housed in an 8-SOIC surface mount package. This component is classified as obsolete, with 3,676 units currently in stock. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for new designs and long-term supply chain planning. Substitute parts must maintain compatibility across electrical specifications, package dimensions, and protocol support to ensure direct replacement capability.

Key Parameters

Parameter	SP481EEN-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver Half-Duplex
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Receiver Hysteresis	20 mV
Data Rate	10 Mbps
Voltage Supply Range	4.75V – 5.25V
Operating Temperature	-40°C to 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the SP481EEN-L are grouped based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

Protocol support: RS422 and RS485
Configuration: Half-duplex, 1 driver / 1 receiver
Package: 8-SOIC form factor (0.154", 3.90mm width)
Mounting: Surface mount
Supply voltage range: Minimum 4.75V – 5.25V overlap required
Operating temperature range: Must support -40°C to 85°C minimum

Substitution Categories:

Category 1: Direct Parametric Equivalent (Active Status) SP485EEN-L (MaxLinear, Inc.) – Identical electrical specifications and operating range, active product status with higher inventory availability.

Category 2: Manufacturer Recommended Alternatives (Analog Devices Inc.) LTC1481 series (CS8#PBF, CS8#TRPBF, IS8#PBF, IS8#TRPBF) and LTC2862 series (MPS8-1#PBF, MPS8-1#TRPBF, MPS8-2#PBF, MPS8-2#TRPBF) – Active products with extended temperature ranges and enhanced performance specifications.

Category 3: High-Performance Alternative MAX14783EASA+ (Analog Devices Inc./Maxim Integrated) – Superior data rate and hysteresis specifications with extended operating temperature range.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temp	Package	Inventory
SP481EEN-L	MaxLinear, Inc.	Obsolete	RS422, RS485	1/1	Half	20 mV	10 Mbps	4.75V – 5.25V	-40°C to 85°C	8-SOIC	3,676
SP485EEN-L	MaxLinear, Inc.	Active	RS422, RS485	1/1	Half	20 mV	10 Mbps	4.75V – 5.25V	-40°C to 85°C	8-SOIC	45,000
LTC1481CS8#PBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	45 mV	2.5 Mbps	4.75V – 5.25V	0°C to 70°C	8-SOIC	3,989
LTC1481CS8#TRPBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	45 mV	2.5 Mbps	4.75V – 5.25V	0°C to 70°C	8-SOIC	3,600
LTC1481IS8#PBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	45 mV	2.5 Mbps	4.75V – 5.25V	-40°C to 85°C	8-SOIC	3,270
LTC1481IS8#TRPBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	45 mV	2.5 Mbps	4.75V – 5.25V	-40°C to 85°C	8-SOIC	3,368
LTC2862MPS8-1#PBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	150 mV	20 Mbps	3V – 5.5V	-55°C to 125°C	8-SOIC	1,900
LTC2862MPS8-1#TRPBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	150 mV	20 Mbps	3V – 5.5V	-55°C to 125°C	8-SOIC	898
LTC2862MPS8-2#PBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	150 mV	250 kbps	3V – 5.5V	-55°C to 125°C	8-SOIC	1,231
LTC2862MPS8-2#TRPBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	150 mV	250 kbps	3V – 5.5V	-55°C to 125°C	8-SOIC	1,072
MAX14783EASA+	Analog Devices Inc./Maxim Integrated	Active	RS422, RS485	1/1	Half	10 mV	42 Mbps	3V – 5.5V	-40°C to 125°C	8-SOIC	51,200

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): SP485EEN-L is the primary substitute, offering identical electrical and thermal specifications to the SP481EEN-L with active product status and significantly higher inventory (45,000 units). Both parts are manufactured by MaxLinear, Inc., and support the same supply voltage range (4.75V – 5.25V) and operating temperature range (-40°C to 85°C). This part is ROHS3 compliant and REACH unaffected.

For Extended Temperature Range Applications: LTC1481IS8#PBF and LTC1481IS8#TRPBF (Analog Devices Inc.) maintain the -40°C to 85°C operating range while offering active product status. These parts are ROHS3 compliant and REACH unaffected. Note that data rate is reduced to 2.5 Mbps and receiver hysteresis is increased to 45 mV compared to the original specification.

For High-Performance Applications with Extended Environmental Range: LTC2862MPS8-1 series (20 Mbps data rate, -55°C to 125°C operating range) and MAX14783EASA+ (42 Mbps data rate, -40°C to 125°C operating range) provide enhanced specifications. Both are ROHS3 compliant and REACH unaffected. The LTC2862 series supports extended supply voltage (3V – 5.5V) and the MAX14783EASA+ offers the highest data rate (42 Mbps) with the lowest receiver hysteresis (10 mV), matching the original part's hysteresis specification.

For Low-Speed Applications: LTC2862MPS8-2 series is suitable for applications requiring only 250 kbps data rate, with extended operating temperature range (-55°C to 125°C) and supply voltage range (3V – 5.5V). ROHS3 compliant and REACH unaffected.

All recommended substitutes are available in both tube and tape & reel packaging options. Selection should be based on specific application requirements for data rate, operating temperature, and supply voltage constraints.

Frequently Asked Questions (FAQ)

Q: Can SP485EEN-L be used as a direct replacement for SP481EEN-L? A: Yes. SP485EEN-L is a parametric equivalent with identical electrical specifications, operating temperature range (-40°C to 85°C), supply voltage (4.75V – 5.25V), and 8-SOIC package. The primary difference is product status (active vs. obsolete) and packaging option (tube vs. standard). Both are manufactured by MaxLinear, Inc.

Q: What are the key differences between the LTC1481 and LTC2862 series? A: LTC1481 series operates at 2.5 Mbps with 45 mV receiver hysteresis and supports 0°C to 70°C (CS8 variants) or -40°C to 85°C (IS8 variants) temperature ranges. LTC2862 series operates at higher data rates (20 Mbps for MPS8-1, 250 kbps for MPS8-2), features 150 mV receiver hysteresis, and supports -55°C to 125°C operating range with extended supply voltage (3V – 5.5V). Both series are ROHS3 compliant.

Q: Is MAX14783EASA+ compatible with the original SP481EEN-L application? A: MAX14783EASA+ is package-compatible (8-SOIC) and protocol-compatible (RS422/RS485 half-duplex, 1/1 configuration). It offers superior performance with 42 Mbps data rate, 10 mV receiver hysteresis (matching the original), and extended operating range (-40°C to 125°C). Supply voltage range is 3V – 5.5V, which encompasses the original 4.75V – 5.25V requirement. Compatibility depends on application-specific performance requirements.

Q: What packaging options are available for substitute parts? A: Substitute parts are available in two packaging formats: Tube (standard packaging) and Tape & Reel (TR) for automated assembly. Part numbers ending in #PBF indicate tube packaging; those ending in #TRPBF indicate tape & reel packaging. Both formats contain identical die and electrical specifications.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All recommended substitute parts (SP485EEN-L, LTC1481 series, LTC2862 series, and MAX14783EASA+) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of receiver hysteresis in transceiver selection? A: Receiver hysteresis determines the voltage differential required between the rising and falling threshold levels. The original SP481EEN-L specifies 20 mV hysteresis. Substitutes with higher hysteresis (45 mV for LTC1481, 150 mV for LTC2862) provide greater noise immunity but may reduce sensitivity to small signal variations. MAX14783EASA+ maintains 10 mV hysteresis, offering improved sensitivity.

Q: Can LTC1481CS8 variants be used in applications requiring -40°C to 85°C operation? A: LTC1481CS8#PBF and LTC1481CS8#TRPBF are rated only for 0°C to 70°C operation. For full -40°C to 85°C range compatibility, use LTC1481IS8#PBF or LTC1481IS8#TRPBF variants, which maintain identical electrical specifications across the extended temperature range.

Q: What is the inventory status for each substitute part? A: SP485EEN-L has the highest availability (45,000 units). MAX14783EASA+ offers 51,200 units. LTC1481 series ranges from 3,270 to 3,989 units. LTC2862 series ranges from 898 to 1,900 units. All parts are listed as new original stock.

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