MAX490ECPA+ Equivalent & Substitute Parts

Part Overview

The MAX490ECPA+ is a full-duplex RS422/RS485 transceiver manufactured by Analog Devices Inc./Maxim Integrated, packaged in an 8-pin DIP configuration for through-hole mounting. This interface IC operates at 2.5 Mbps data rate with a supply voltage range of 4.75V to 5.25V and an operating temperature range of 0°C to 70°C. The part is currently active in production and ROHS3 compliant.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when inventory constraints require alternative sourcing, or when design requirements permit operation across extended temperature ranges or higher data rates supported by compatible alternatives.

Key Parameters

Parameter	Value
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Full
Receiver Hysteresis	70 mV
Data Rate	2.5 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)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX490ECPA+ is determined by the following critical parameters:

Core Compatibility Requirements:

Protocol: RS422/RS485
Number of Drivers/Receivers: 1/1 configuration
Duplex: Full-duplex operation
Package: 8-DIP (0.300", 7.62mm)
Mounting Type: Through Hole
Supply Voltage: 4.75V ~ 5.25V

Substitution Categories:

Parametric Equivalents (MAX490CPA+, MAX490ECPA+): Identical electrical and thermal specifications. Direct pin-for-pin replacements with no design modifications required.

Direct Manufacturer Equivalent (LTC490CN8#PBF): Same base functionality and package. Receiver hysteresis and supply voltage match. Data rate specification not provided in source data. Operating temperature range 0°C to 70°C aligns with primary part.

Upgrade Alternative (LTC490IN8#PBF): Extended operating temperature range (-40°C to 85°C) permits use in wider environmental conditions. Identical electrical specifications otherwise. Data rate specification not provided in source data.

Manufacturer Recommended Alternatives (SN65LBC179AP, SN75LBC179AP): Texas Instruments equivalents with identical protocol, driver/receiver configuration, and package. Both parts are obsolete. SN65LBC179AP supports extended temperature range (-40°C to 85°C) and higher data rate (30 Mbps). SN75LBC179AP operates at standard temperature range (0°C to 70°C) with 30 Mbps data rate capability. Receiver hysteresis is 50 mV versus 70 mV on primary part.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temperature	Receiver Hysteresis	Product Status	Inventory (Pcs)
MAX490ECPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	Active	3600
MAX490CPA+	Analog Devices Inc./Maxim Integrated	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	Active	4660
LTC490CN8#PBF	Analog Devices Inc.	RS422, RS485	1/1	Not specified	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	Active	2112
LTC490IN8#PBF	Analog Devices Inc.	RS422, RS485	1/1	Not specified	4.75V ~ 5.25V	-40°C ~ 85°C	70 mV	Active	3700
SN65LBC179AP	Texas Instruments	RS422, RS485	1/1	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	50 mV	Obsolete	3900
SN75LBC179AP	Texas Instruments	RS422, RS485	1/1	30 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	50 mV	Obsolete	3600

Engineering Selection Recommendations

For Direct Replacement (No Design Changes): MAX490CPA+ is the primary equivalent, offering identical specifications with higher available inventory (4660 pcs). Both MAX490ECPA+ and MAX490CPA+ are active products with ROHS3 compliance and unlimited moisture sensitivity rating.

For Extended Temperature Operation: LTC490IN8#PBF extends the operating range to -40°C to 85°C while maintaining all other electrical parameters. This part is active and ROHS3 compliant, suitable for industrial or automotive applications requiring wider thermal performance.

For Standard Temperature with Alternative Sourcing: LTC490CN8#PBF provides equivalent functionality at standard temperature range (0°C to 70°C). Both LTC490 variants are manufactured by Analog Devices Inc. and carry ROHS3 compliance.

For Obsolete Part Replacement: SN75LBC179AP matches the standard temperature range (0°C to 70°C) of the primary part. SN65LBC179AP provides extended temperature capability (-40°C to 85°C). Both Texas Instruments parts are obsolete and should be selected only when new stock from active manufacturers is unavailable. Both support higher data rates (30 Mbps) and carry ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can MAX490CPA+ be used as a direct replacement for MAX490ECPA+? A: Yes. MAX490CPA+ is a parametric equivalent with identical electrical specifications, supply voltage, operating temperature range, and 8-DIP package configuration. No circuit modifications are required.

Q: What is the difference between LTC490CN8#PBF and LTC490IN8#PBF? A: Both parts share identical electrical specifications and package. The primary difference is operating temperature range: LTC490CN8#PBF operates 0°C to 70°C, while LTC490IN8#PBF operates -40°C to 85°C. Select LTC490IN8#PBF for applications requiring extended thermal performance.

Q: Are the Texas Instruments parts (SN65LBC179AP, SN75LBC179AP) suitable replacements? A: Both parts are functionally compatible with identical protocol, driver/receiver configuration, and package. However, both are obsolete products. SN75LBC179AP matches the standard temperature range (0°C to 70°C). SN65LBC179AP provides extended temperature operation (-40°C to 85°C). Receiver hysteresis differs at 50 mV versus 70 mV on the primary part. Use only when active alternatives are unavailable.

Q: Does receiver hysteresis difference affect compatibility? A: Receiver hysteresis of 50 mV (Texas Instruments parts) versus 70 mV (Analog Devices parts) affects noise immunity characteristics. The lower hysteresis value provides tighter input thresholds. Compatibility depends on specific application noise margins and signal integrity requirements.

Q: What data rate should I expect from LTC490 parts? A: Data rate specifications are not provided in the source documentation for LTC490CN8#PBF and LTC490IN8#PBF. Consult the manufacturer datasheet for precise data rate performance. The primary MAX490ECPA+ operates at 2.5 Mbps.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed parts carry ROHS3 compliance certification. Moisture sensitivity level is 1 (Unlimited) for Analog Devices parts and Not Applicable for obsolete Texas Instruments parts.

Q: Can I use these parts interchangeably in existing designs? A: All substitute parts share the 8-DIP (0.300", 7.62mm) package and through-hole mounting configuration. Pin-for-pin compatibility is maintained across all listed alternatives. Verify supply voltage (4.75V to 5.25V) and operating temperature requirements before selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message