SP3232EUEA-L RS232 Transceiver: Equivalent & Substitute Parts

Part Overview

The SP3232EUEA-L is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 16-SSOP surface mount package. This interface IC is designed for serial communication applications requiring RS232 protocol compliance. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers to maintain design continuity and ensure supply chain availability.

Key Parameters

Parameter	SP3232EUEA-L
Manufacturer	MaxLinear, Inc.
Protocol	RS232
Type	Transceiver
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	1 Mbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	16-SSOP (0.209", 5.30mm Width)
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the SP3232EUEA-L is determined by strict alignment of the following critical parameters:

Protocol: RS232
Type: Transceiver
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage - Supply: 3V ~ 5.5V
Mounting Type: Surface Mount
Package / Case: 16-SSOP (0.209", 5.30mm Width)

Secondary parameters including receiver hysteresis, data rate, operating temperature range, and MSL rating may vary within acceptable engineering tolerances but must be documented for design verification. All substitute parts listed maintain full RS232 protocol compliance and identical electrical interface characteristics required for direct PCB replacement.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status
SP3232EUEA-L	MaxLinear, Inc.	RS232	2/2	Full	300 mV	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Discontinued	RoHS Compliant
SN65C3232EDBR	Texas Instruments	RS232	2/2	Full	300 mV	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant
TRSF3232EIDBR	Texas Instruments	RS232	2/2	Full	300 mV	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Obsolete	ROHS3 Compliant
ICL3232ECAZ	Renesas Electronics Corporation	RS232	2/2	Full	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
ICL3232ECAZ-T	Renesas Electronics Corporation	RS232	2/2	Full	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
ICL3232EIAZ	Renesas Electronics Corporation	RS232	2/2	Full	500 mV	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant
ICL3232EIAZ-T	Renesas Electronics Corporation	RS232	2/2	Full	500 mV	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CAE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	300 mV	235 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CAE+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	300 mV	235 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CDBR	Texas Instruments	RS232	2/2	Full	300 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232ECAE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring direct replacement of the discontinued SP3232EUEA-L, the following selection criteria apply:

Primary Recommendation: SN65C3232EDBR (Texas Instruments)

This part maintains identical electrical specifications to the SP3232EUEA-L, including 300 mV receiver hysteresis, 1 Mbps data rate, and -40°C to 85°C operating temperature range. The part is in active production status with ROHS3 compliance and improved MSL rating (1 Unlimited vs. 2 1-Year). Inventory availability is confirmed at 2200 units.

Secondary Recommendation: ICL3232EIAZ or ICL3232EIAZ-T (Renesas Electronics Corporation)

These parts provide full RS232 2/2 transceiver functionality with identical supply voltage and package specifications. Operating temperature range matches the original part (-40°C to 85°C). Data rate is reduced to 250 kbps and receiver hysteresis is increased to 500 mV, which are acceptable for most legacy RS232 applications. Both variants are in active production with high inventory availability (23,920 and 30,100 units respectively).

Alternative Recommendation: MAX3232ECAE+ (Analog Devices Inc./Maxim Integrated)

This part delivers 1 Mbps data rate matching the original specification with 500 mV receiver hysteresis. Operating temperature is limited to 0°C to 70°C, which may restrict use in extended temperature applications. The part is in active production with ROHS3 compliance.

Parts with restricted operating temperature ranges (0°C to 70°C) are suitable only for applications not requiring the full -40°C to 85°C thermal envelope of the original design.

Frequently Asked Questions (FAQ)

Q: Can SN65C3232EDBR directly replace SP3232EUEA-L without design modification?

A: Yes. The SN65C3232EDBR maintains identical electrical specifications including receiver hysteresis (300 mV), data rate (1 Mbps), supply voltage range (3V to 5.5V), operating temperature (-40°C to 85°C), and 16-SSOP package geometry. No PCB layout changes are required.

Q: What is the difference between ICL3232ECAZ and ICL3232EIAZ?

A: Both parts are functionally equivalent RS232 2/2 transceivers in 16-SSOP packages. The primary difference is operating temperature range: ICL3232ECAZ operates 0°C to 70°C, while ICL3232EIAZ operates -40°C to 85°C. Select ICL3232EIAZ for applications requiring extended temperature performance matching the original SP3232EUEA-L specification.

Q: Why do some substitute parts have lower data rates (250 kbps vs. 1 Mbps)?

A: Data rate specifications reflect maximum guaranteed performance under specified conditions. RS232 protocol operation at lower data rates remains fully compatible with higher-speed capable devices. Applications operating below the maximum rated data rate of substitute parts will function correctly.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering. MSL 1 (Unlimited) parts have no time restriction. MSL 2 (1 Year) and MSL 3 (168 Hours) parts require controlled storage and handling. For high-volume manufacturing, MSL 1 rated parts reduce logistics complexity.

Q: Are all listed parts RoHS compliant?

A: Yes. The original SP3232EUEA-L is RoHS Compliant. All substitute parts listed carry ROHS3 Compliant certification, confirming compliance with current RoHS Directive requirements.

Q: Can I use MAX3232CDBR if my application operates at 0°C to 70°C?

A: Yes. MAX3232CDBR is rated for 0°C to 70°C operation and is suitable for applications within this temperature range. However, if your design requires -40°C to 85°C performance, select SN65C3232EDBR, ICL3232EIAZ, or ICL3232EIAZ-T instead.

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

A: Tube packaging is suitable for low-volume applications and manual assembly. Tape & Reel (TR) and Cut Tape (CT) packaging are designed for automated pick-and-place assembly in high-volume manufacturing. Select packaging based on production volume and assembly equipment capability.

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