SP490EEP-L Equivalent & Substitute Parts

Part Overview

The SP490EEP-L is a 1/1 full-duplex RS422/RS485 transceiver IC manufactured by MaxLinear, Inc., housed in an 8-DIP through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The SP490EEP-L operates across a 4.75V to 5.25V supply range with a 10 Mbps data rate and 70 mV receiver hysteresis, suitable for industrial serial communication applications requiring full-duplex RS422 or RS485 protocol support.

Key Parameters

Parameter	SP490EEP-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS422, RS485
Drivers/Receivers	1/1
Duplex	Full
Receiver Hysteresis	70 mV
Data Rate	10 Mbps
Voltage Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package	8-DIP (0.300", 7.62mm)
Product Status	Obsolete
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SP490EEP-L is determined by the following critical parameters:

Electrical Compatibility Requirements:

Protocol support (RS422, RS485)
Driver/Receiver configuration (1/1)
Duplex mode (Full)
Receiver hysteresis (70 mV preferred for signal integrity)
Data rate capability (minimum 10 Mbps)
Supply voltage range (4.75V ~ 5.25V for direct replacement)
Operating temperature range (-40°C ~ 85°C for extended industrial use)

Physical Compatibility Requirements:

Package type (8-DIP through-hole for PCB socket compatibility)
Pin count and spacing (8-PDIP standard)

Substitute parts are grouped into two categories:

Category 1: Direct Pin-Compatible Replacements (8-DIP Through-Hole) Parts maintaining identical package, pinout, and electrical specifications for direct socket substitution without PCB modification.

Category 2: Functional Equivalents with Parameter Variations Parts meeting core RS422/RS485 transceiver functionality but with differing supply voltage ranges, temperature ratings, or receiver hysteresis values. These require design verification before implementation.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Voltage Supply	Operating Temperature	Package	Product Status
SP490EEP-L	MaxLinear, Inc.	RS422, RS485	1/1	Full	70 mV	10 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	Obsolete
SP490EEN-L/TR	MaxLinear, Inc.	RS422, RS485	1/1	Full	70 mV	10 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	Active
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

Engineering Selection Recommendations

Tier 1: Recommended Direct Replacements

LTC490IN8#PBF (Analog Devices Inc.) is the primary recommended substitute. It maintains identical electrical specifications (70 mV hysteresis, 4.75V ~ 5.25V supply, -40°C ~ 85°C operating range) and 8-DIP package compatibility. The part is active in production with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory compliance.

MAX488EEPA+ (Analog Devices Inc./Maxim Integrated) provides an alternative with matching supply voltage, temperature range, and 8-DIP package. While data rate is specified at 250 kbps versus the original 10 Mbps, this part maintains 70 mV receiver hysteresis and full-duplex RS422/RS485 operation. Active product status and ROHS3 compliance support production continuity.

Tier 2: Functional Equivalents with Design Considerations

MAX3490EEPA+ and MAX3490EPA+ (Analog Devices Inc./Maxim Integrated) offer full-duplex RS422/RS485 operation with -40°C ~ 85°C temperature range in 8-DIP packages. These parts operate on 3V ~ 3.6V supply voltage and feature 50 mV receiver hysteresis. Implementation requires supply voltage circuit modification and signal integrity verification due to reduced hysteresis margin.

LTC490CN8#PBF (Analog Devices Inc.) is suitable for applications with 0°C ~ 70°C operating requirements. It matches the original supply voltage and receiver hysteresis but operates within a narrower temperature range. This part is appropriate for commercial-grade applications not requiring extended low-temperature operation.

Tier 3: Package Variant

SP490EEN-L/TR (MaxLinear, Inc.) is the surface-mount equivalent from the original manufacturer, maintaining identical electrical specifications and active product status. This part requires PCB redesign for 8-SOIC surface-mount implementation but provides direct functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can LTC490IN8#PBF be used as a direct replacement for SP490EEP-L without circuit modification?

A: Yes. LTC490IN8#PBF maintains identical electrical specifications (70 mV receiver hysteresis, 4.75V ~ 5.25V supply, -40°C ~ 85°C operating temperature) and 8-DIP through-hole package pinout. No circuit modification is required for direct socket substitution.

Q: What is the difference between MAX488EEPA+ and SP490EEP-L?

A: Both parts support RS422/RS485 protocols with 1/1 driver/receiver configuration, full-duplex operation, 70 mV receiver hysteresis, and 4.75V ~ 5.25V supply voltage. The primary difference is data rate specification: SP490EEP-L is rated at 10 Mbps while MAX488EEPA+ is rated at 250 kbps. Both operate across -40°C ~ 85°C and use 8-DIP packages. The lower data rate specification of MAX488EEPA+ does not preclude higher-speed operation in applications where the original part was functional.

Q: Why do MAX3490 series parts require design verification?

A: MAX3490 series parts (MAX3490CPA+, MAX3490EEPA+, MAX3490EPA+) operate on 3V ~ 3.6V supply voltage compared to the original 4.75V ~ 5.25V specification. Additionally, these parts feature 50 mV receiver hysteresis versus the original 70 mV. These differences require verification of signal integrity margins and power supply compatibility before implementation.

Q: Is SP490EEN-L/TR a suitable replacement if PCB redesign is acceptable?

A: Yes. SP490EEN-L/TR is manufactured by MaxLinear, Inc., the original manufacturer of SP490EEP-L, and maintains identical electrical specifications. The part is active in production with ROHS3 compliance. The 8-SOIC surface-mount package requires PCB layout modification but provides direct functional equivalence with improved availability compared to the obsolete through-hole version.

Q: What compliance certifications apply to substitute parts?

A: All recommended substitute parts carry ROHS3 compliance certification. LTC490IN8#PBF, LTC490CN8#PBF, and all MAX series parts are REACH unaffected. All parts are classified under ECCN EAR99 and HTSUS 8542.39.0001, matching the original part's export classification.

Q: Can multiple substitute parts be used interchangeably in the same application?

A: LTC490IN8#PBF and MAX488EEPA+ are interchangeable for applications requiring 4.75V ~ 5.25V supply, 70 mV receiver hysteresis, and -40°C ~ 85°C operation. MAX3490 series parts require separate design verification due to different supply voltage and receiver hysteresis specifications. Parts should not be mixed within the same system without documented compatibility analysis.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message