SP310ACT-L RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP310ACT-L is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in an 18-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates within a 4.5V to 5.5V supply range with a 240 kbps data rate and 500 mV receiver hysteresis, serving as a standard interface solution for RS232 serial communication applications.

Key Parameters

Parameter	SP310ACT-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Data Rate	240 kbps
Voltage Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package/Case	18-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	500 mV
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the SP310ACT-L is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Drivers/Receivers: 2/2 configuration
Duplex: Full
Voltage Supply: 4.5V ~ 5.5V
Package/Case: 18-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Data Rate: Substitute parts must support minimum 240 kbps; higher rates are acceptable
Operating Temperature: Substitute parts with extended temperature ranges (-40°C ~ 85°C) are compatible with the original 0°C ~ 70°C specification
Receiver Hysteresis: Substitute parts with 400 mV hysteresis are functionally compatible with the original 500 mV specification

All substitute parts listed below maintain the core 2/2 RS232 transceiver functionality in the 18-SOIC package with matching supply voltage requirements.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Voltage Supply	Operating Temp	Package	Product Status	RoHS Status
SP310ACT-L	MaxLinear, Inc.	RS232	2/2	240 kbps	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Obsolete	Not specified
ADM222ARZ	Analog Devices Inc.	RS232	2/2	200 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
ADM222ARZ-REEL	Analog Devices Inc.	RS232	2/2	200 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
LT1080CSW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1080CSW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1080ISW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
LT1080ISW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
LT1180ACSW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1180ACSW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1180AISW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
LT1180AISW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are manufactured by Analog Devices Inc. and carry active product status, ensuring long-term availability and supply chain stability. The SP310ACT-L's obsolete status makes these active alternatives essential for system continuity.

For applications requiring matching operating temperature range (0°C ~ 70°C): LT1080CSW#PBF, LT1080CSW#TRPBF, LT1180ACSW#PBF, and LT1180ACSW#TRPBF provide direct thermal compatibility while offering improved data rates (250 kbps versus 240 kbps).

For applications requiring extended operating temperature range (-40°C ~ 85°C): ADM222ARZ, ADM222ARZ-REEL, LT1080ISW#PBF, LT1080ISW#TRPBF, LT1180AISW#PBF, and LT1180AISW#TRPBF provide enhanced thermal performance suitable for industrial and automotive environments.

All substitute parts are ROHS3 compliant and carry MSL ratings of 1 (Unlimited), indicating superior moisture handling compared to the original part's MSL 3 (168 Hours) specification.

Frequently Asked Questions (FAQ)

Q: Can ADM222ARZ replace SP310ACT-L directly? A: Yes. ADM222ARZ maintains the critical 2/2 RS232 transceiver configuration, 18-SOIC package, and 4.5V ~ 5.5V supply voltage. The 200 kbps data rate is lower than the original 240 kbps, but remains within RS232 standard operating parameters. Extended temperature range (-40°C ~ 85°C) exceeds the original 0°C ~ 70°C specification.

Q: What is the difference between LT1080CSW#PBF and LT1080CSW#TRPBF? A: Both parts are electrically identical LT1080 transceivers in 18-SOIC packages. The primary difference is packaging format: #PBF indicates Tube packaging, while #TRPBF indicates Tape & Reel packaging. Selection depends on assembly process requirements and quantity needs.

Q: Are there temperature-matched alternatives to SP310ACT-L? A: Yes. LT1080CSW#PBF, LT1080CSW#TRPBF, LT1180ACSW#PBF, and LT1180ACSW#TRPBF all operate within the original 0°C ~ 70°C temperature range while providing 250 kbps data rates.

Q: What does the "I" designation in LT1080ISW#PBF indicate? A: The "I" in the part number designates industrial temperature range (-40°C ~ 85°C), compared to the "C" designation which indicates commercial temperature range (0°C ~ 70°C). Both are functionally compatible 2/2 RS232 transceivers in 18-SOIC packages.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed Analog Devices substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory requirements.

Q: Can I use parts with different receiver hysteresis values? A: Yes. The substitute parts with 400 mV receiver hysteresis are functionally compatible with the original 500 mV specification. The 400 mV hysteresis provides tighter noise margins and is suitable for the same RS232 applications.

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