XR3081XID-F RS422/RS485 Transceiver Equivalent & Substitute Parts

Part Overview

The XR3081XID-F is a full-duplex RS422/RS485 transceiver manufactured by MaxLinear, Inc., housed in an 8-SOIC surface mount package. This component operates at 250 kbps data rate with a 4.5V to 5.5V supply voltage range and supports industrial temperature operation from -40°C to 85°C. The part is currently obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility for new designs and production continuity.

Key Parameters

Parameter	XR3081XID-F
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS422, RS485
Duplex Mode	Full
Number of Drivers/Receivers	1/1
Data Rate	250 kbps
Receiver Hysteresis	25 mV
Supply Voltage	4.5V – 5.5V
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

Substitution of the XR3081XID-F is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol support: RS422 and RS485
Duplex mode: Full-duplex operation
Driver/Receiver configuration: 1/1 (single driver, single receiver)
Package type: 8-SOIC surface mount
Supply voltage range: 4.5V to 5.5V
Operating temperature range: Minimum -40°C to 85°C coverage

Substitute Categories:

Category 1: Full-Duplex Direct Equivalents (Preferred) Parts maintaining identical duplex mode, data rate, and temperature range:

MAX13081EESA+ (Analog Devices Inc./Maxim Integrated)
MAX13081EESA+T (Analog Devices Inc./Maxim Integrated)
MAX13084EESA+ (Analog Devices Inc./Maxim Integrated)
MAX13084EESA+T (Analog Devices Inc./Maxim Integrated)

Category 2: Half-Duplex Alternatives Parts with reduced duplex capability but compatible package and protocol:

LTC1481CS8#PBF (Analog Devices Inc.)
LTC1481CS8#TRPBF (Analog Devices Inc.)
LTC1485CS8#PBF (Analog Devices Inc.)
LTC1485CS8#TRPBF (Analog Devices Inc.)

Half-duplex substitution requires circuit redesign to accommodate unidirectional communication mode.

Parameter Comparison

Part Number	Manufacturer	Duplex	Data Rate	Receiver Hysteresis	Supply Voltage	Operating Temp	Package	Product Status	Packaging Type
XR3081XID-F	MaxLinear, Inc.	Full	250 kbps	25 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Obsolete	—
MAX13081EESA+	Analog Devices Inc./Maxim Integrated	Full	250 kbps	100 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Active	Tube
MAX13081EESA+T	Analog Devices Inc./Maxim Integrated	Full	250 kbps	100 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Active	Cut Tape (CT) & Digi-Reel®
MAX13084EESA+	Analog Devices Inc./Maxim Integrated	Full	500 kbps	100 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Active	Tube
MAX13084EESA+T	Analog Devices Inc./Maxim Integrated	Full	500 kbps	100 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Active	Tape & Reel (TR)
LTC1481CS8#PBF	Analog Devices Inc.	Half	2.5 Mbps	45 mV	4.75V – 5.25V	0°C to 70°C	8-SOIC	Active	Tube
LTC1481CS8#TRPBF	Analog Devices Inc.	Half	2.5 Mbps	45 mV	4.75V – 5.25V	0°C to 70°C	8-SOIC	Active	Tape & Reel (TR)
LTC1485CS8#PBF	Analog Devices Inc.	Half	—	60 mV	4.75V – 5.25V	0°C to 70°C	8-SOIC	Active	Tube
LTC1485CS8#TRPBF	Analog Devices Inc.	Half	—	60 mV	4.75V – 5.25V	0°C to 70°C	8-SOIC	Active	Tape & Reel (TR)

Engineering Selection Recommendations

For Full-Duplex Replacement (Direct Functional Equivalence):

The MAX13081EESA+ and MAX13081EESA+T series provide the closest functional match to the XR3081XID-F. Both maintain full-duplex operation, identical supply voltage range (4.5V – 5.5V), and matching temperature range (-40°C to 85°C). These parts are active products with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory compliance. The increased receiver hysteresis (100 mV versus 25 mV) provides improved noise immunity in industrial environments.

The MAX13084EESA+ and MAX13084EESA+T variants offer enhanced data rate capability (500 kbps versus 250 kbps) while maintaining all other electrical and thermal specifications. Selection between MAX13081 and MAX13084 depends on application bandwidth requirements.

For Half-Duplex Applications:

The LTC1481CS8#PBF and LTC1481CS8#TRPBF are active alternatives supporting half-duplex operation. These require circuit redesign to implement unidirectional communication protocols. Operating temperature range is reduced (0°C to 70°C), limiting use in extended industrial temperature applications. Supply voltage tolerance is narrower (4.75V – 5.25V).

The LTC1485CS8#PBF and LTC1485CS8#TRPBF provide half-duplex operation with identical supply and temperature specifications to the LTC1481 series.

Packaging Considerations:

Tube packaging (suffix #PBF) is suitable for lower-volume production and manual assembly. Tape & Reel packaging (suffix #TRPBF or #T) is optimized for high-volume automated pick-and-place assembly.

Frequently Asked Questions (FAQ)

Q: Can the MAX13081EESA+ directly replace the XR3081XID-F without circuit modification?

A: Yes. The MAX13081EESA+ maintains identical duplex mode (full), protocol support (RS422/RS485), driver/receiver configuration (1/1), package type (8-SOIC), supply voltage range (4.5V – 5.5V), and operating temperature range (-40°C to 85°C). Pin-to-pin compatibility and functional equivalence are confirmed. No circuit redesign is required.

Q: What is the difference between MAX13081 and MAX13084 series?

A: Both series maintain full-duplex operation and identical electrical specifications. The primary distinction is data rate: MAX13081 operates at 250 kbps (matching the XR3081XID-F), while MAX13084 supports 500 kbps. Selection depends on application bandwidth requirements. Both are suitable for the XR3081XID-F application if data rate does not exceed 250 kbps.

Q: Why do LTC1481 and LTC1485 parts require circuit redesign?

A: These parts operate in half-duplex mode, permitting only unidirectional communication at any given time. The XR3081XID-F operates in full-duplex mode, supporting simultaneous bidirectional communication. Applications designed for full-duplex operation require circuit and firmware modifications to function with half-duplex transceivers.

Q: What is the impact of increased receiver hysteresis in the MAX13081 series?

A: The MAX13081 series specifies 100 mV receiver hysteresis compared to 25 mV in the XR3081XID-F. Increased hysteresis reduces susceptibility to noise and signal reflections on the RS422/RS485 bus, improving reliability in electrically noisy industrial environments. This is a functional improvement for most applications.

Q: Are there temperature range limitations with LTC1481/LTC1485 substitutes?

A: Yes. LTC1481 and LTC1485 parts operate from 0°C to 70°C, compared to the XR3081XID-F range of -40°C to 85°C. These alternatives are unsuitable for applications requiring extended industrial temperature operation below 0°C or above 70°C.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging contains components in a plastic tube suitable for manual handling and lower-volume assembly. Tape & Reel packaging presents components on continuous carrier tape for automated pick-and-place assembly equipment. Electrical and functional specifications are identical; packaging selection depends on manufacturing process requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed (MAX13081, MAX13084, LTC1481, LTC1485 series) are ROHS3 compliant. The XR3081XID-F, being obsolete, does not carry current compliance certifications. Transition to active parts ensures regulatory compliance for new production.

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