SP3232EHCA-L RS232 Transceiver: Equivalent & Substitute Parts

Part Overview

The SP3232EHCA-L is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 16-SSOP surface mount package. This component operates across a 3V to 5.5V supply range with a receiver hysteresis of 300 mV and supports data rates up to 460 Kbps. The part is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	SP3232EHCA-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	460 Kbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package	16-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the SP3232EHCA-L is determined by the following critical parameters:

Protocol & Configuration: RS232 standard, 2/2 driver/receiver configuration, full-duplex operation
Electrical Compatibility: Supply voltage range 3V ~ 5.5V, operating temperature 0°C ~ 70°C minimum
Physical Compatibility: 16-SSOP package with 0.209" width (5.30mm), surface mount technology
Performance Baseline: Data rate capability and receiver hysteresis must support or exceed application requirements

Substitute parts are grouped into two categories based on receiver hysteresis specification:

Category A (300 mV Hysteresis): MAX3232CAE+, MAX3232CAE+T, MAX3232CDBR, MAX3232ECDBR — matched hysteresis to original specification.

Category B (500 mV Hysteresis): ICL3232ECAZ, ICL3232ECAZ-T, ICL3232EIAZ, ICL3232EIAZ-T, MAX3232ECAE+, MAX3232ECAE+T — higher hysteresis tolerance, suitable where noise immunity is prioritized.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Receiver Hysteresis	Data Rate	Voltage Supply	Operating Temperature	Package	Product Status	RoHS Status
SP3232EHCA-L	MaxLinear, Inc.	2/2	300 mV	460 Kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Obsolete	—
ICL3232ECAZ	Renesas Electronics	2/2	500 mV	250 Kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
ICL3232ECAZ-T	Renesas Electronics	2/2	500 mV	250 Kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
ICL3232EIAZ	Renesas Electronics	2/2	500 mV	250 Kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant
ICL3232EIAZ-T	Renesas Electronics	2/2	500 mV	250 Kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CAE+	Analog Devices Inc./Maxim Integrated	2/2	300 mV	235 Kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CAE+T	Analog Devices Inc./Maxim Integrated	2/2	300 mV	235 Kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CDBR	Texas Instruments	2/2	300 mV	250 Kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232ECAE+	Analog Devices Inc./Maxim Integrated	2/2	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232ECAE+T	Analog Devices Inc./Maxim Integrated	2/2	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232ECDBR	Texas Instruments	2/2	300 mV	250 Kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Selection between Category A and Category B substitutes depends on application noise environment and signal integrity requirements.

For applications requiring matched receiver hysteresis (300 mV), Category A parts—MAX3232CAE+, MAX3232CAE+T, MAX3232CDBR, and MAX3232ECDBR—provide direct electrical equivalence. These parts support data rates of 235–250 Kbps, which remain within the operational envelope of the original SP3232EHCA-L.

For applications operating in high-noise environments or requiring extended temperature ranges, Category B parts offer enhanced noise immunity through 500 mV receiver hysteresis. ICL3232EIAZ and ICL3232EIAZ-T extend the operating temperature to -40°C ~ 85°C, suitable for industrial applications. MAX3232ECAE+ and MAX3232ECAE+T deliver the highest data rate capability at 1 Mbps, supporting future bandwidth requirements.

All substitutes are available in 16-SSOP surface mount packaging with identical footprint dimensions, enabling direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with 500 mV receiver hysteresis in place of the original 300 mV specification?

A: Yes. Higher receiver hysteresis increases noise immunity and does not degrade performance in standard RS232 applications. The 500 mV specification is a superset of the 300 mV requirement and is electrically compatible.

Q: What is the difference between parts ending in "+" and those ending in "-T"?

A: The "+" suffix typically indicates tube packaging, while "-T" denotes tape and reel or cut tape packaging. Both contain identical die and electrical specifications; packaging selection depends on assembly process requirements and order quantities.

Q: Are all substitute parts pin-compatible with the SP3232EHCA-L?

A: Yes. All listed substitutes use the 16-SSOP package with identical pin assignments and footprint dimensions (0.209" width, 5.30mm). Direct PCB replacement is possible without layout modification.

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

A: Parts with active product status and high inventory levels provide superior long-term availability. MAX3232ECDBR (66,666 units in stock) and ICL3232EIAZ-T (30,100 units in stock) represent the strongest availability positions among the listed substitutes.

Q: Can I use MAX3232ECAE+ if my application only requires 250 Kbps data rate?

A: Yes. The MAX3232ECAE+ supports 1 Mbps operation, which exceeds the 250 Kbps requirement. Excess bandwidth capability does not affect performance in lower-speed applications and provides design margin for future upgrades.

Q: What is the impact of operating temperature range differences?

A: The original SP3232EHCA-L operates 0°C ~ 70°C. Substitutes with identical temperature ranges (ICL3232ECAZ, ICL3232ECAZ-T, MAX3232CAE+, MAX3232CAE+T, MAX3232CDBR, MAX3232ECAE+, MAX3232ECAE+T, MAX3232ECDBR) are direct thermal equivalents. ICL3232EIAZ and ICL3232EIAZ-T extend to -40°C ~ 85°C for industrial applications requiring wider temperature tolerance.

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