SP310ECT-L RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP310ECT-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 maximum data rate of 240 kbps and supports full-duplex RS232 communication with 500 mV receiver hysteresis.

Key Parameters

Parameter	Value
Manufacturer Part Number	SP310ECT-L
Manufacturer	MaxLinear, Inc.
Product Category	Interface / RS232 Transceiver
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex Mode	Full
Data Rate	240 kbps
Voltage Supply Range	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
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SP310ECT-L is determined by strict equivalence in the following electrical and mechanical 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: 4.5V ~ 5.5V supply voltage, data rate capability of 240 kbps or higher
Receiver Hysteresis: 400 mV or 500 mV acceptable (both support RS232 signal integrity)
Operating Temperature Range: Substitute parts must support minimum 0°C ~ 70°C; extended range (-40°C ~ 85°C) parts are compatible for broader applications
Mounting and Packaging Format: Surface mount only; tube or tape & reel packaging formats are interchangeable for the same electrical part

All substitute parts listed are manufactured by Analog Devices Inc. and maintain active product status with ROHS3 compliance and improved moisture sensitivity ratings (MSL 1, Unlimited).

Parameter Comparison

Parameter	SP310ECT-L	LT1080CSW#PBF	LT1080ISW#PBF	LT1180ACSW#PBF	LT1280ACSW#PBF	LT1780CSW#PBF
Manufacturer	MaxLinear, Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Protocol	RS232	RS232	RS232	RS232	RS232	RS232
Drivers/Receivers	2/2	2/2	2/2	2/2	2/2	2/2
Duplex	Full	Full	Full	Full	Full	Full
Data Rate	240 kbps	250 kbps	250 kbps	250 kbps	250 kbps	250 kbps
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	18-SOIC	18-SOIC	18-SOIC	18-SOIC	18-SOIC	18-SOIC
Receiver Hysteresis	500 mV	400 mV	400 mV	400 mV	400 mV	400 mV
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes for Direct Replacement (0°C ~ 70°C Operating Range)

For applications requiring the original operating temperature range of 0°C ~ 70°C, the following parts provide direct electrical and mechanical equivalence:

LT1080CSW#PBF (Tube packaging): Active product status, ROHS3 compliant, MSL 1 rating
LT1180ACSW#PBF (Tube packaging): Active product status, ROHS3 compliant, MSL 1 rating
LT1280ACSW#PBF (Tube packaging): Active product status, ROHS3 compliant, MSL 1 rating
LT1780CSW#PBF (Tube packaging): Active product status, ROHS3 compliant, MSL 1 rating

Extended Temperature Range Alternative (-40°C ~ 85°C Operating Range)

For applications requiring extended temperature operation:

LT1080ISW#PBF (Tube packaging): Active product status, ROHS3 compliant, MSL 1 rating, extended temperature range

Tape & Reel Packaging Options

Equivalent parts are available in tape & reel format for high-volume manufacturing:

LT1080CSW#TRPBF, LT1080ISW#TRPBF, LT1180ACSW#TRPBF, LT1280ACSW#TRPBF, LT1780CSW#TRPBF

All substitute parts maintain ROHS3 compliance and REACH unaffected status, with improved moisture sensitivity ratings compared to the obsolete SP310ECT-L.

Frequently Asked Questions (FAQ)

Q: Can LT1080CSW#PBF directly replace SP310ECT-L in existing designs?

A: Yes. Both parts share identical electrical specifications (RS232 protocol, 2/2 full-duplex configuration, 4.5V ~ 5.5V supply, 18-SOIC package) and operating temperature range (0°C ~ 70°C). The LT1080CSW#PBF is an active product with improved compliance ratings.

Q: What is the difference between tube and tape & reel packaging?

A: Tube and tape & reel packaging formats contain electrically identical parts. Tube packaging is suitable for lower-volume applications and manual assembly. Tape & reel packaging is optimized for automated pick-and-place manufacturing. Selection depends on production volume and assembly process requirements.

Q: Why do substitute parts have 400 mV receiver hysteresis instead of 500 mV?

A: Both 400 mV and 500 mV hysteresis values meet RS232 signal integrity requirements. The 400 mV specification in substitute parts provides equivalent noise immunity for standard RS232 applications while maintaining full protocol compliance.

Q: Should I use the extended temperature range LT1080ISW#PBF if my application only requires 0°C ~ 70°C?

A: The extended temperature range part (-40°C ~ 85°C) is electrically compatible and can be used in applications requiring only 0°C ~ 70°C operation. Selection should be based on system requirements, cost considerations, and inventory management.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Analog Devices substitute parts listed (LT1080, LT1180A, LT1280A, LT1780 series) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings, providing improved environmental compliance compared to the obsolete SP310ECT-L.

Q: What is the data rate difference between SP310ECT-L (240 kbps) and substitute parts (250 kbps)?

A: The substitute parts support 250 kbps maximum data rate, which exceeds the SP310ECT-L specification of 240 kbps. This higher capability ensures compatibility with existing designs and provides margin for future applications.

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