SP3243EUEA-L RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP3243EUEA-L is a full-duplex RS232 transceiver manufactured by MaxLinear, Inc., configured with 3 drivers and 5 receivers in a 28-SSOP 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 across 3V to 5.5V supply voltage with a 1Mbps data rate and is suitable for legacy serial communication applications requiring RS232 protocol compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	SP3243EUEA-L
Manufacturer	MaxLinear, Inc.
Product Category	Interface Transceiver
Protocol	RS232
Configuration	3 Drivers / 5 Receivers, Full Duplex
Data Rate	1 Mbps
Supply Voltage Range	3V to 5.5V
Operating Temperature	-40°C to 85°C
Package Type	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	300 mV
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SP3243EUEA-L is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Configuration: 3 Drivers / 5 Receivers
Duplex Mode: Full
Supply Voltage: 3V to 5.5V
Operating Temperature: -40°C to 85°C
Package: 28-SSOP (0.209", 5.30mm Width)
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Data Rate: Minimum 1 Mbps (higher rates are acceptable)
Receiver Hysteresis: 300 mV to 500 mV (both values support RS232 specifications)
Product Status: Active or Last Time Buy (preferred over Obsolete)
Moisture Sensitivity Level: MSL 1 or MSL 2 (both acceptable)

All substitute parts listed maintain identical electrical functionality, mechanical compatibility, and package footprint with the original SP3243EUEA-L.

Parameter Comparison

Part Number	Manufacturer	Configuration	Data Rate	Receiver Hysteresis	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status
SP3243EUEA-L	MaxLinear, Inc.	3/5 Full Duplex	1 Mbps	300 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Obsolete	Not Specified
ICL3245EIAZ	Renesas Electronics	3/5 Full Duplex	1 Mbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Active	ROHS3 Compliant
ICL3245EIAZ-T	Renesas Electronics	3/5 Full Duplex	1 Mbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Active	ROHS3 Compliant
MAX3243EEAI+	Analog Devices Inc./Maxim Integrated	3/5 Full Duplex	250 kbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Active	ROHS3 Compliant
MAX3243EEAI+T	Analog Devices Inc./Maxim Integrated	3/5 Full Duplex	250 kbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Active	ROHS3 Compliant
MAX3244EEAI+	Analog Devices Inc./Maxim Integrated	3/5 Full Duplex	250 kbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Active	ROHS3 Compliant
MAX3244EEAI+T	Analog Devices Inc./Maxim Integrated	3/5 Full Duplex	250 kbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Active	ROHS3 Compliant
MAX3245EEAI+	Analog Devices Inc./Maxim Integrated	3/5 Full Duplex	1 Mbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Active	ROHS3 Compliant
MAX3245EEAI+T	Analog Devices Inc./Maxim Integrated	3/5 Full Duplex	1 Mbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Active	ROHS3 Compliant
SN65C3243DBR	Texas Instruments	3/5 Full Duplex	1 Mbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Active	ROHS3 Compliant
TRSF3243IDB	Texas Instruments	3/5 Full Duplex	1 Mbps	500 mV	3V - 5.5V	-40°C to 85°C	28-SSOP	Last Time Buy	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

ICL3245EIAZ and ICL3245EIAZ-T from Renesas Electronics are direct functional equivalents with identical 1 Mbps data rate performance. Both parts are Active status with ROHS3 compliance and REACH unaffected certification. The ICL3245EIAZ-T variant in Tape & Reel packaging offers superior availability (1224 units in stock) for production environments.

MAX3245EEAI+ and MAX3245EEAI+T from Analog Devices Inc./Maxim Integrated maintain 1 Mbps data rate matching and Active product status. The MAX3245EEAI+T variant provides the highest inventory availability (17,641 units) with Cut Tape & Digi-Reel packaging. Both variants carry MSL 1 (Unlimited) moisture sensitivity rating and full ROHS3 compliance.

SN65C3243DBR from Texas Instruments provides 1 Mbps performance with Active status and extensive inventory (100,398 units). This part offers the largest stock position and is suitable for high-volume applications.

Secondary Substitutes (Reduced Data Rate):

MAX3243EEAI+, MAX3243EEAI+T, MAX3244EEAI+, and MAX3244EEAI+T operate at 250 kbps data rate, which is lower than the original 1 Mbps specification. These parts are suitable only for applications where the reduced data rate does not impact system performance. All variants maintain Active status, ROHS3 compliance, and MSL 1 moisture sensitivity.

Obsolete Status Consideration:

TRSF3243IDB from Texas Instruments carries Last Time Buy status, indicating limited future availability. While functionally equivalent with 1 Mbps performance and ROHS3 compliance, this part should be considered only when other Active alternatives are unavailable.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SP3243EUEA-L with any of the listed parts?

A: All listed parts are electrically and mechanically compatible with the SP3243EUEA-L. They maintain identical 3/5 driver/receiver configuration, RS232 protocol, 28-SSOP package footprint, and -40°C to 85°C operating temperature range. Substitution is valid for all listed parts.

Q: What is the difference between parts with 1 Mbps and 250 kbps data rates?

A: The original SP3243EUEA-L and most substitutes operate at 1 Mbps. The MAX3243 and MAX3244 series operate at 250 kbps. The lower data rate is suitable only for applications that do not require the full 1 Mbps bandwidth. Verify your system requirements before selecting a 250 kbps variant.

Q: What does the receiver hysteresis difference (300 mV vs 500 mV) mean?

A: Both 300 mV and 500 mV hysteresis values comply with RS232 specifications. The 500 mV hysteresis in substitute parts provides improved noise immunity in electrically noisy environments. This is a beneficial characteristic and does not reduce compatibility.

Q: What is the difference between packaging options (Tube, Tape & Reel, Cut Tape)?

A: Tube packaging is suitable for manual assembly and small-quantity applications. Tape & Reel and Cut Tape & Digi-Reel packaging are designed for automated pick-and-place assembly in production environments. The electrical and mechanical specifications are identical across all packaging options.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original SP3243EUEA-L does not specify RoHS status. If RoHS compliance is required for your application, select from the Active substitute parts with confirmed ROHS3 compliance.

Q: Which substitute part has the best availability?

A: SN65C3243DBR from Texas Instruments has the highest inventory availability with 100,398 units in stock. MAX3245EEAI+T from Analog Devices Inc./Maxim Integrated is the second option with 17,641 units available.

Q: Can I use parts with Last Time Buy status?

A: TRSF3243IDB carries Last Time Buy status, indicating this is the final production run. While functionally equivalent, this part should be used only when Active alternatives are unavailable, as future restocking is not possible.

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