SP310ECT-L/TR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP310ECT-L/TR is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in an 18-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The device operates within a 4.5V to 5.5V supply range and supports data rates up to 240 kbps with a receiver hysteresis of 500 mV.

Key Parameters

Parameter	SP310ECT-L/TR
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Number of 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 SP310ECT-L/TR is determined by the following critical parameters:

Protocol Compatibility: RS232 full-duplex transceiver with 2/2 driver/receiver configuration
Package Compatibility: 18-SOIC surface mount package (0.295", 7.50mm Width)
Electrical Specifications: Supply voltage range 4.5V ~ 5.5V, data rate capability, receiver hysteresis
Operating Temperature Range: Minimum 0°C ~ 70°C support required
Product Status: Active status preferred for long-term availability

Substitute parts are grouped by base product number (LT1080, LT1180, LT1280, LT1780, LTC1382) with variations in temperature rating and packaging format (Tube or Tape & Reel). All listed substitutes maintain the 18-SOIC package footprint and RS232 protocol compliance.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status
SP310ECT-L/TR	MaxLinear, Inc.	RS232	2/2	240 kbps	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Obsolete	N/A
LT1080CSW#PBF	Analog Devices Inc.	RS232	2/2	250 KBd	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1080CSW#TRPBF	Analog Devices Inc.	RS232	2/2	250 KBd	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1080ISW#PBF	Analog Devices Inc.	RS232	2/2	250 KBd	4.5V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
LT1080ISW#TRPBF	Analog Devices Inc.	RS232	2/2	250 KBd	4.5V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
LT1180ACSW#PBF	Analog Devices Inc.	RS232	2/2	250 KBd	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1280ACSW#PBF	Analog Devices Inc.	RS232	2/2	250 KBd	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1280ACSW#TRPBF	Analog Devices Inc.	RS232	2/2	250 KBd	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1780CSW#PBF	Analog Devices Inc.	RS232	2/2	250 KBd	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LT1780CSW#TRPBF	Analog Devices Inc.	RS232	2/2	250 KBd	4.5V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
LTC1382CSW#PBF	Analog Devices Inc.	RS232	2/2	120 KBd	4.5V ~ 5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed are manufactured by Analog Devices Inc. and maintain active product status, ensuring long-term availability and supply chain stability. The LT1080, LT1180, LT1280, and LT1780 series provide direct functional equivalence with the SP310ECT-L/TR, supporting identical 2/2 full-duplex RS232 transceiver operation within the 4.5V to 5.5V supply range and 18-SOIC package footprint.

For applications requiring the original 0°C to 70°C operating temperature range, select from LT1080CSW#PBF, LT1080CSW#TRPBF, LT1180ACSW#PBF, LT1280ACSW#PBF, LT1280ACSW#TRPBF, LT1780CSW#PBF, or LT1780CSW#TRPBF. For extended temperature operation (-40°C to 85°C), the LT1080ISW#PBF and LT1080ISW#TRPBF variants are available.

Packaging format selection depends on assembly requirements: Tube packaging (suffix #PBF) for lower-volume applications, or Tape & Reel (suffix #TRPBF) for automated high-volume production. All active substitutes are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements.

The LTC1382CSW#PBF operates at a reduced data rate of 120 KBd and supply voltage range of 4.5V to 5V, making it suitable only for applications with lower bandwidth requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SP310ECT-L/TR with any of the listed substitutes?

A: Yes, all listed Analog Devices parts maintain the same 18-SOIC package footprint, RS232 protocol, 2/2 driver/receiver configuration, and 4.5V to 5.5V supply voltage range. Pin-to-pin compatibility is maintained across the LT1080, LT1180, LT1280, and LT1780 series for the specified operating temperature range.

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

A: Tube packaging (#PBF suffix) is used for manual assembly and lower-volume applications, typically containing 13 units per tube. Tape & Reel packaging (#TRPBF suffix) is designed for automated pick-and-place assembly in high-volume production environments. Both formats contain identical die and electrical specifications.

Q: Why does LTC1382CSW#PBF have a lower data rate specification?

A: The LTC1382CSW#PBF is rated for 120 KBd maximum data rate compared to 250 KBd for the LT series. This part is suitable only for applications with lower bandwidth requirements. For full compatibility with the SP310ECT-L/TR's 240 kbps capability, use LT1080, LT1180, LT1280, or LT1780 series parts.

Q: What is the difference between the C and I temperature grades?

A: The C-grade (LT1080CSW, LT1180ACSW, LT1280ACSW, LT1780CSW) operates from 0°C to 70°C. The I-grade (LT1080ISW) operates from -40°C to 85°C. Select based on your application's required operating temperature range.

Q: Are all substitutes RoHS compliant?

A: Yes, all Analog Devices substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is receiver hysteresis and does it affect substitution?

A: Receiver hysteresis is the voltage difference between rising and falling threshold levels. The SP310ECT-L/TR specifies 500 mV hysteresis, while all Analog Devices substitutes specify 400 mV. This difference is within normal design tolerance for RS232 transceiver applications and does not prevent functional substitution.

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