SP490ECP-L RS422/RS485 Transceiver Equivalent & Substitute Parts

Part Overview

The SP490ECP-L is a 1/1 full-duplex RS422/RS485 transceiver manufactured by MaxLinear, Inc., housed in an 8-DIP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. The part operates within a 4.75V to 5.25V supply range with a 10Mbps data rate capability and supports standard RS422/RS485 serial communication protocols.

Key Parameters

Parameter	SP490ECP-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Full
Receiver Hysteresis	70 mV
Data Rate	10 Mbps
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the SP490ECP-L is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol support: RS422/RS485
Configuration: 1/1 full-duplex transceiver
Package type: 8-DIP (0.300", 7.62mm)
Mounting: Through Hole
Receiver hysteresis: 70 mV (preferred match)
Supply voltage: 4.75V ~ 5.25V (preferred match)
Operating temperature: 0°C ~ 70°C (minimum requirement)
MSL rating: 1 (Unlimited)

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

Group 1 - Direct Electrical Match (70 mV Hysteresis, 4.75V-5.25V Supply): LTC490CN8#PBF, MAX488CPA+, MAX488ECPA+, MAX488EEPA+, MAX488EPA+, MAX490CPA+

Group 2 - Functional Equivalents (Different Supply Voltage or Hysteresis): LTC490IN8#PBF, MAX3490CPA+, MAX3490EEPA+, MAX3490EPA+

All substitute parts maintain identical package geometry, pin configuration, and protocol support, ensuring mechanical and functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Hysteresis	Data Rate	Supply Voltage	Operating Temp	Package	Product Status
SP490ECP-L	MaxLinear, Inc.	RS422, RS485	1/1	Full	70 mV	10 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	Obsolete
LTC490CN8#PBF	Analog Devices Inc.	RS422, RS485	1/1	Full	70 mV	—	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	Active
LTC490IN8#PBF	Analog Devices Inc.	RS422, RS485	1/1	Full	70 mV	—	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	Active
MAX3490CPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Full	50 mV	10 Mbps	3V ~ 3.6V	0°C ~ 70°C	8-DIP	Active
MAX3490EEPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Full	50 mV	10 Mbps	3V ~ 3.6V	-40°C ~ 85°C	8-DIP	Active
MAX3490EPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Full	50 mV	10 Mbps	3V ~ 3.6V	-40°C ~ 85°C	8-DIP	Active
MAX488CPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Full	70 mV	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	Active
MAX488ECPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Full	70 mV	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	Active
MAX488EEPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Full	70 mV	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	Active
MAX488EPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Full	70 mV	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	Active
MAX490CPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	Full	70 mV	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Operating Parameters): LTC490CN8#PBF and MAX488CPA+/MAX488ECPA+ are the closest electrical equivalents, matching the 70 mV hysteresis, 4.75V-5.25V supply voltage, and 0°C-70°C operating temperature range. Both are active products with ROHS3 compliance and unlimited MSL rating.

For Extended Temperature Range Applications: LTC490IN8#PBF, MAX488EEPA+, and MAX488EPA+ extend the operating temperature to -40°C ~ 85°C while maintaining the 70 mV hysteresis and 4.75V-5.25V supply voltage. These parts are suitable for industrial and automotive environments requiring wider temperature tolerance.

For Lower Supply Voltage Systems: MAX3490CPA+, MAX3490EEPA+, and MAX3490EPA+ operate at 3V-3.6V supply voltage with 50 mV hysteresis. These are appropriate for low-power applications but require circuit redesign to accommodate the different supply voltage specification.

Compliance Status: All substitute parts carry ROHS3 compliance and REACH Unaffected status, meeting modern environmental and regulatory requirements. The SP490ECP-L obsolete status necessitates transition to one of these active alternatives for new procurement and long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can MAX3490EPA+ directly replace SP490ECP-L without circuit modification? A: MAX3490EPA+ maintains identical package, pin configuration, and protocol support. However, it operates at 3V-3.6V supply voltage compared to SP490ECP-L's 4.75V-5.25V range. Direct substitution requires circuit redesign to accommodate the lower supply voltage specification.

Q: What is the difference between LTC490CN8#PBF and LTC490IN8#PBF? A: Both parts are manufactured by Analog Devices Inc. with identical electrical specifications except operating temperature. LTC490CN8#PBF operates 0°C-70°C, while LTC490IN8#PBF extends to -40°C-85°C. Select based on your application's temperature requirements.

Q: Why do MAX488 series parts have lower data rates (250 kbps) compared to SP490ECP-L (10 Mbps)? A: MAX488 series transceivers are designed for lower-speed, longer-distance RS485 applications. They are functionally compatible but optimized for different performance profiles. Confirm your application's actual data rate requirement before selection.

Q: Are all substitute parts available in the same 8-DIP package? A: Yes. All listed substitute parts use the 8-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical compatibility and direct PCB mounting without layout modifications.

Q: Which substitute offers the best compatibility for immediate replacement? A: LTC490CN8#PBF provides the closest match with identical hysteresis (70 mV), supply voltage (4.75V-5.25V), and operating temperature (0°C-70°C) specifications. It is an active product with full compliance certifications.

Q: Do all substitutes support both RS422 and RS485 protocols? A: Yes. All listed substitute parts support both RS422 and RS485 protocols with 1/1 full-duplex configuration, maintaining protocol compatibility with the original SP490ECP-L design.

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