SP481EEP-L Equivalent & Substitute Parts

Part Overview

The SP481EEP-L is a half-duplex RS422/RS485 transceiver IC manufactured by MaxLinear, Inc., housed in an 8-DIP package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The SP481EEP-L operates within a 4.75V to 5.25V supply range with a 10 Mbps data rate capability and supports industrial temperature ranges from -40°C to 85°C. Identifying compatible alternatives ensures design continuity and supply chain reliability.

Key Parameters

Parameter	SP481EEP-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS422, RS485
Duplex Configuration	Half
Number of Drivers/Receivers	1/1
Data Rate	10 Mbps
Voltage Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Package Type	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the SP481EEP-L is determined by strict alignment of the following parameters:

Protocol support: RS422 and RS485 half-duplex operation
Electrical interface: 1/1 driver/receiver configuration
Supply voltage: 4.75V to 5.25V range
Package form factor: 8-DIP (0.300", 7.62mm) through-hole mounting
Pin compatibility: Identical pinout for direct board-level replacement

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in receiver hysteresis, data rate, and operating temperature ranges are secondary parameters that do not prevent functional substitution within the defined electrical envelope.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Package	Product Status
SP481EEP-L	MaxLinear, Inc.	RS422, RS485	1/1	10 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	20 mV	8-DIP	Obsolete
LTC1481CN8#PBF	Analog Devices Inc.	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	45 mV	8-DIP	Active
LTC1481IN8#PBF	Analog Devices Inc.	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	45 mV	8-DIP	Active
MAX481CPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	8-DIP	Active
MAX481ECPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	8-DIP	Active
MAX481EPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	70 mV	8-DIP	Active
MAX485ECPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	8-DIP	Active
MAX485EEPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	70 mV	8-DIP	Active

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing status, providing long-term supply assurance compared to the obsolete SP481EEP-L. Selection among substitutes depends on application-specific temperature and data rate requirements:

For applications requiring the full industrial temperature range (-40°C to 85°C), LTC1481IN8#PBF, MAX481EPA+, and MAX485EEPA+ are suitable options. These parts maintain the extended temperature specification of the original SP481EEP-L.

For applications operating within commercial temperature ranges (0°C to 70°C), LTC1481CN8#PBF, MAX481CPA+, MAX481ECPA+, and MAX485ECPA+ provide equivalent functionality with active product status and RoHS3 compliance.

All substitute parts carry ROHS3 compliance and REACH unaffected status, supporting modern manufacturing and environmental requirements. The LTC1481 series from Analog Devices and MAX481/MAX485 series from Maxim Integrated are industry-standard RS422/RS485 transceivers with established design support and broad availability.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SP481EEP-L with any of the listed substitutes?

A: Yes, all listed parts share identical 8-DIP pinout, supply voltage range (4.75V to 5.25V), and RS422/RS485 half-duplex protocol support. Direct board-level substitution is supported without circuit modification.

Q: What is the difference between LTC1481CN8#PBF and LTC1481IN8#PBF?

A: Both are LTC1481 transceivers from Analog Devices with identical electrical specifications. The primary difference is operating temperature range: LTC1481CN8#PBF operates 0°C to 70°C, while LTC1481IN8#PBF operates -40°C to 85°C, matching the original SP481EEP-L industrial temperature specification.

Q: Why do substitute parts show lower data rates (2.5 Mbps vs. 10 Mbps)?

A: The SP481EEP-L specifies 10 Mbps capability, while most active substitutes specify 2.5 Mbps. Both ratings represent maximum guaranteed performance under specified conditions. Actual application data rates depend on bus length, termination, and signal integrity. For applications requiring higher data rates, consult device datasheets for extended performance characteristics.

Q: Are all substitutes RoHS compliant?

A: Yes, all active substitute parts listed carry RoHS3 compliance certification, meeting current environmental and manufacturing standards.

Q: Which substitute offers the best supply availability?

A: LTC1481IN8#PBF (5100 pcs) and MAX485EEPA+ (4296 pcs) show the highest current inventory levels among active substitutes, providing immediate availability for production requirements.

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