SP310EET-L RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP310EET-L is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in an 18-SOIC surface mount package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain compatibility across electrical specifications, mechanical packaging, and operational parameters to ensure direct replacement capability in existing designs.

Key Parameters

Parameter	SP310EET-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Data Rate	240 kbps
Supply Voltage	4.5V – 5.5V
Operating Temperature	-40°C to 85°C
Package	18-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	500 mV
RoHS Status	RoHS Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment across the following critical parameters:

Protocol & Configuration: RS232 full-duplex transceiver with 2/2 driver/receiver configuration
Electrical Compatibility: Supply voltage range 4.5V – 5.5V, operating temperature -40°C to 85°C
Mechanical Compatibility: 18-SOIC surface mount package (0.295", 7.50mm width)
Data Rate Capability: Minimum 240 kbps operation
Receiver Hysteresis: 400 mV or 500 mV acceptable
Compliance: RoHS3 compliant alternatives preferred for active product status

All substitute parts listed below meet these criteria and are available from Analog Devices Inc. in active product status with improved MSL ratings (1 – Unlimited) compared to the discontinued SP310EET-L.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Package	Receiver Hysteresis	RoHS Status	MSL Rating	Product Status
SP310EET-L	MaxLinear, Inc.	RS232	2/2	240 kbps	4.5V – 5.5V	-40°C to 85°C	18-SOIC	500 mV	RoHS Compliant	3 (168 Hours)	Discontinued
LT1080ISW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V – 5.5V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active
LT1080ISW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V – 5.5V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active
LT1180AISW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V – 5.5V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active
LT1180AISW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V – 5.5V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active
LT1280AISW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V – 5.5V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active
LT1280AISW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V – 5.5V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active
LT1780ISW#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V – 5.5V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active
LT1780ISW#TRPBF	Analog Devices Inc.	RS232	2/2	250 kbps	4.5V – 5.5V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active
LTC1382ISW#PBF	Analog Devices Inc.	RS232	2/2	120 kbps	4.5V – 5.0V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active
LTC1382ISW#TRPBF	Analog Devices Inc.	RS232	2/2	120 kbps	4.5V – 5.0V	-40°C to 85°C	18-SOIC	400 mV	ROHS3 Compliant	1 (Unlimited)	Active

Engineering Selection Recommendations

Primary Substitutes (Preferred)

LT1080ISW#PBF, LT1080ISW#TRPBF, LT1180AISW#PBF, LT1180AISW#TRPBF, LT1280AISW#PBF, and LT1280AISW#TRPBF represent the optimal replacement options. All are manufactured by Analog Devices Inc., maintain active product status, and exceed the electrical and mechanical requirements of the SP310EET-L. These parts feature improved MSL ratings (1 – Unlimited versus 3 – 168 Hours) and ROHS3 compliance, providing enhanced reliability for new production and long-term availability.

Secondary Substitutes (Data Rate Consideration)

LT1780ISW#PBF and LT1780ISW#TRPBF are functionally equivalent with identical electrical specifications and packaging. These alternatives are suitable for applications where the 250 kbps data rate capability meets system requirements.

Limited Substitutes (Reduced Data Rate)

LTC1382ISW#PBF and LTC1382ISW#TRPBF operate at 120 kbps maximum data rate and feature a reduced supply voltage range (4.5V – 5.0V). These parts are suitable only for applications where the SP310EET-L operates below 120 kbps and where the supply voltage remains within 4.5V – 5.0V. The reduced data rate capability makes these options unsuitable for designs requiring the full 240 kbps performance of the original part.

Packaging Considerations

Tube packaging (#PBF suffix) is appropriate for lower-volume applications and manual assembly. Tape & Reel packaging (#TRPBF suffix) is specified for high-volume production and automated pick-and-place assembly. Selection between these packaging options depends on manufacturing volume and assembly methodology, not electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can LT1080ISW#PBF directly replace SP310EET-L in existing designs?

A: Yes. Both parts share identical RS232 protocol, 2/2 driver/receiver configuration, 18-SOIC packaging, and compatible supply voltage (4.5V – 5.5V) and operating temperature (-40°C to 85°C) ranges. The LT1080ISW#PBF operates at 250 kbps, exceeding the SP310EET-L specification of 240 kbps. No circuit modifications are required.

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

A: #PBF denotes Tube packaging for manual handling and lower-volume applications. #TRPBF denotes Tape & Reel packaging for automated assembly and high-volume production. Both packaging options contain electrically identical components. Selection is based on manufacturing process requirements, not electrical performance.

Q: Why is LTC1382ISW not recommended as a primary substitute?

A: LTC1382ISW operates at a maximum data rate of 120 kbps, which is below the SP310EET-L specification of 240 kbps. Additionally, the supply voltage range is restricted to 4.5V – 5.0V, compared to the SP310EET-L range of 4.5V – 5.5V. This part is suitable only for applications confirmed to operate within these reduced specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Analog Devices substitute parts listed carry ROHS3 compliance certification. The original SP310EET-L carries RoHS Compliant status. All alternatives meet or exceed the original compliance requirements.

Q: What is the significance of MSL rating differences?

A: The SP310EET-L carries MSL 3 (168 Hours), indicating moisture sensitivity requiring controlled storage and handling. All Analog Devices substitutes carry MSL 1 (Unlimited), eliminating moisture sensitivity concerns and simplifying inventory management and assembly processes.

Q: Can multiple substitute parts be used interchangeably within the same design?

A: Yes. LT1080ISW, LT1180AISW, LT1280AISW, and LT1780ISW are electrically equivalent across all critical parameters (protocol, configuration, data rate, voltage, temperature, and package). These parts can be substituted for one another without circuit modification. However, LTC1382ISW should not be interchanged with other options due to reduced data rate and voltage specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message