SP3245EEA-L RS232 Transceiver: Equivalent & Substitute Parts

Part Overview

The SP3245EEA-L is a 3/5 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 28-SSOP surface mount package. This interface IC operates across 3V to 5.5V supply voltage with a 1 Mbps data rate and 200 mV receiver hysteresis. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	SP3245EEA-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	3/5
Duplex	Full
Data Rate	1 Mbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS Compliant
MSL Rating	2 (1 Year)

Substitute Part Grouping Explanation

Substitution eligibility for the SP3245EEA-L is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Drivers/Receivers: 3/5 configuration
Duplex: Full
Data Rate: 1 Mbps minimum
Voltage Supply: 3V ~ 5.5V range
Package: 28-SSOP form factor
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Receiver Hysteresis: 200 mV (main part) to 500 mV (substitutes) — higher hysteresis remains functionally compatible
Operating Temperature: -40°C ~ 85°C (main part) to 0°C ~ 70°C (limited range substitutes) — substitutes with narrower ranges are acceptable if application requirements fall within specified limits
RoHS Status: RoHS Compliant to ROHS3 Compliant — both meet environmental compliance
MSL Rating: 2 (1 Year) to 1 (Unlimited) — lower MSL values indicate superior moisture resistance

All substitute parts listed maintain identical electrical protocol, channel configuration, and physical packaging, ensuring direct functional replacement without circuit redesign.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Voltage Supply	Operating Temp	Receiver Hysteresis	Package	Product Status	RoHS Status	MSL
SP3245EEA-L	MaxLinear, Inc.	RS232	3/5	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	200 mV	28-SSOP	Discontinued	RoHS Compliant	2 (1 Year)
ICL3245CAZ	Renesas Electronics	RS232	3/5	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	500 mV	28-SSOP	Active	ROHS3 Compliant	2 (1 Year)
ICL3245CAZ-T	Renesas Electronics	RS232	3/5	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	500 mV	28-SSOP	Active	ROHS3 Compliant	2 (1 Year)
ICL3245EIAZ	Renesas Electronics	RS232	3/5	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	500 mV	28-SSOP	Active	ROHS3 Compliant	2 (1 Year)
ICL3245EIAZ-T	Renesas Electronics	RS232	3/5	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	500 mV	28-SSOP	Active	ROHS3 Compliant	2 (1 Year)
MAX3245EAI+	Analog Devices Inc./Maxim Integrated	RS232	3/5	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	500 mV	28-SSOP	Active	ROHS3 Compliant	1 (Unlimited)
MAX3245EAI+T	Analog Devices Inc./Maxim Integrated	RS232	3/5	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	500 mV	28-SSOP	Active	ROHS3 Compliant	1 (Unlimited)
MAX3245EEAI+	Analog Devices Inc./Maxim Integrated	RS232	3/5	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	500 mV	28-SSOP	Active	ROHS3 Compliant	1 (Unlimited)
MAX3245EEAI+T	Analog Devices Inc./Maxim Integrated	RS232	3/5	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	500 mV	28-SSOP	Active	ROHS3 Compliant	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Full Temperature Range Compatibility):

The ICL3245EIAZ, ICL3245EIAZ-T, MAX3245EAI+, MAX3245EAI+T, MAX3245EEAI+, and MAX3245EEAI+T are direct functional equivalents with operating temperature ranges matching the original SP3245EEA-L (-40°C ~ 85°C). These parts are all in active production status with ROHS3 compliance certification. The Analog Devices/Maxim Integrated variants (MAX3245 series) offer superior moisture sensitivity ratings (MSL 1 Unlimited) compared to the original part (MSL 2, 1 Year), providing enhanced reliability for long-term storage and field deployment.

Secondary Substitutes (Limited Temperature Range):

The ICL3245CAZ and ICL3245CAZ-T operate within a narrower temperature range (0°C ~ 70°C). These substitutes are suitable only for applications where operating conditions remain within this specified envelope. Both are active production parts with ROHS3 compliance.

Packaging Considerations:

Tube packaging (ICL3245CAZ, ICL3245EIAZ, MAX3245EAI+, MAX3245EEAI+) is appropriate for component-level procurement and repair operations. Tape & Reel packaging (ICL3245CAZ-T, ICL3245EIAZ-T, MAX3245EAI+T, MAX3245EEAI+T) and Cut Tape & Digi-Reel (MAX3245EAI+T, MAX3245EEAI+T) formats support high-volume manufacturing workflows.

Frequently Asked Questions (FAQ)

Q: Can I use ICL3245CAZ as a direct replacement for SP3245EEA-L in all applications?

A: The ICL3245CAZ is electrically compatible but operates within a 0°C ~ 70°C temperature range, compared to the original part's -40°C ~ 85°C range. Substitution is valid only if your application operates within the narrower temperature window.

Q: What is the difference between MAX3245EAI+ and MAX3245EEAI+?

A: Both parts are functionally identical RS232 transceivers with 3/5 drivers/receivers in 28-SSOP packaging. The difference lies in packaging format: MAX3245EAI+ is supplied in Tube, while MAX3245EEAI+ is also supplied in Tube. Both offer MSL 1 (Unlimited) moisture sensitivity rating.

Q: Why do some substitutes have 500 mV receiver hysteresis instead of 200 mV?

A: Receiver hysteresis determines the voltage threshold differential for input signal detection. Higher hysteresis (500 mV) provides improved noise immunity compared to the original 200 mV specification. This is a compatible variation that does not compromise RS232 protocol compliance or signal integrity in standard applications.

Q: Are all listed substitutes RoHS compliant?

A: Yes. The original SP3245EEA-L is RoHS Compliant. All substitute parts carry ROHS3 Compliant certification, which represents an enhanced environmental compliance standard.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be stored at specified humidity before soldering. MSL 1 (Unlimited) parts like the MAX3245 series have no time restriction and are preferred for long-term inventory management. MSL 2 (1 Year) parts require soldering within one year of packaging opening.

Q: Can I mix packaging formats (Tube vs. Tape & Reel) in the same production run?

A: Yes. Tube and Tape & Reel formats contain identical die and electrical specifications. Packaging format selection depends on assembly equipment compatibility and procurement logistics, not electrical performance.

Q: Which substitute offers the best long-term reliability?

A: The MAX3245 series (MAX3245EAI+, MAX3245EAI+T, MAX3245EEAI+, MAX3245EEAI+T) from Analog Devices/Maxim Integrated provides superior moisture protection with MSL 1 (Unlimited) rating and maintains full -40°C ~ 85°C operating temperature range, matching the original part's thermal specifications.

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