SP310ACT-L/TR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP310ACT-L/TR 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 communication applications.

Key Parameters

Parameter	SP310ACT-L/TR
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	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/TR is determined by strict alignment of the following critical parameters:

Core Compatibility Criteria:

Protocol: RS232
Configuration: 2/2 Drivers/Receivers, Full Duplex
Package: 18-SOIC (0.295", 7.50mm Width)
Voltage Supply: 4.5V ~ 5.5V
Mounting Type: Surface Mount
Data Rate: Minimum 240 kbps

Acceptable Parameter Variations:

Operating Temperature Range: May extend beyond 0°C ~ 70°C (wider ranges are acceptable)
Receiver Hysteresis: 400 mV is acceptable (lower hysteresis maintains compatibility)
Product Status: Active status preferred for long-term availability
Packaging Format: Tube, Cut Tape, or Tape & Reel formats are interchangeable based on procurement requirements

All substitute parts listed maintain electrical and mechanical compatibility with the original SP310ACT-L/TR specification while offering improved availability and compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Voltage Supply	Operating Temp	Receiver Hysteresis	Package	Product Status	RoHS Status
SP310ACT-L/TR	MaxLinear, Inc.	RS232	2/2	240 kbps	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	18-SOIC	Obsolete	—
ADM222ARZ	Analog Devices Inc.	RS232	2/2	200 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	400 mV	18-SOIC	Active	ROHS3 Compliant
ADM222ARZ-REEL	Analog Devices Inc.	RS232	2/2	200 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	400 mV	18-SOIC	Active	ROHS3 Compliant
LT1080CSW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	0°C ~ 70°C	400 mV	18-SOIC	Active	ROHS3 Compliant
LT1080CSW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	0°C ~ 70°C	400 mV	18-SOIC	Active	ROHS3 Compliant
LT1080ISW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	400 mV	18-SOIC	Active	ROHS3 Compliant
LT1080ISW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	400 mV	18-SOIC	Active	ROHS3 Compliant
LT1180ACSW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	0°C ~ 70°C	400 mV	18-SOIC	Active	ROHS3 Compliant
LT1180ACSW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	0°C ~ 70°C	400 mV	18-SOIC	Active	ROHS3 Compliant
LT1180AISW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	400 mV	18-SOIC	Active	ROHS3 Compliant
LT1180AISW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	400 mV	18-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

The LT1080 and LT1180 series from Analog Devices Inc. represent the optimal substitutes for the SP310ACT-L/TR. These parts exceed the original specification with data rates of 250 kbps (compared to 240 kbps), maintain identical 18-SOIC packaging, and operate within the required 4.5V to 5.5V supply range. All variants carry ROHS3 compliance and unlimited moisture sensitivity level (MSL), ensuring long-term availability and environmental compliance.

Temperature Range Selection:

For applications requiring the original 0°C to 70°C operating range, select LT1080CSW#PBF, LT1080CSW#TRPBF, LT1180ACSW#PBF, or LT1180ACSW#TRPBF. For extended temperature applications requiring -40°C to 85°C operation, select LT1080ISW#PBF, LT1080ISW#TRPBF, LT1180AISW#PBF, or LT1180AISW#TRPBF.

Packaging Format Selection:

Tube packaging (#PBF suffix) suits low-volume and prototype applications. Tape & Reel packaging (#TRPBF suffix) is appropriate for high-volume production and automated assembly processes.

Secondary Substitute (Extended Temperature):

The ADM222ARZ and ADM222ARZ-REEL from Analog Devices Inc. provide an alternative with extended operating temperature range (-40°C to 85°C) and ROHS3 compliance. These parts operate at 200 kbps, which remains within acceptable parameters for RS232 communication. The ADM222ARZ-REEL variant is optimized for tape & reel procurement.

All substitute parts maintain full electrical and mechanical compatibility with the SP310ACT-L/TR while offering active product status and modern compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SP310ACT-L/TR with any of the listed substitutes?

A: Yes. All listed substitutes maintain the same 18-SOIC package, 2/2 RS232 transceiver configuration, full-duplex operation, and 4.5V to 5.5V supply voltage. Electrical and mechanical compatibility is guaranteed across all substitutes.

Q: What is the difference between the LT1080 and LT1180 series?

A: Both series are functionally equivalent 2/2 RS232 transceivers with identical electrical specifications. The primary distinction is internal design optimization. Both operate at 250 kbps and are suitable for direct substitution of the SP310ACT-L/TR.

Q: Does the lower receiver hysteresis (400 mV vs. 500 mV) affect compatibility?

A: No. Lower receiver hysteresis improves noise immunity and signal detection reliability. This represents an enhancement over the original specification and does not compromise compatibility.

Q: What is the difference between #PBF and #TRPBF packaging suffixes?

A: #PBF indicates Tube packaging, suitable for manual handling and low-volume applications. #TRPBF indicates Tape & Reel packaging, optimized for automated pick-and-place assembly and high-volume production. Both formats contain identical die and electrical specifications.

Q: Why is the ADM222ARZ data rate lower (200 kbps vs. 240 kbps)?

A: The ADM222ARZ operates at 200 kbps, which remains fully compatible with RS232 communication standards and the SP310ACT-L/TR application. RS232 protocol does not require matching data rates between components; the 200 kbps specification is sufficient for standard serial communication.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All Analog Devices Inc. substitutes listed carry ROHS3 compliance certification, meeting current environmental and regulatory requirements.

Q: Can I use substitutes with extended temperature ranges in place of the original 0°C to 70°C specification?

A: Yes. Extended temperature range variants (-40°C to 85°C) are fully backward compatible with applications requiring only 0°C to 70°C operation. The wider temperature range provides additional design flexibility without compromising performance.

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