SP3223ECA-L RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP3223ECA-L is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 20-SSOP surface mount package. This interface IC operates across a 3V to 5.5V supply range with a receiver hysteresis of 300 mV and supports data rates up to 235 Kbps. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	SP3223ECA-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	235 Kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution eligibility for the SP3223ECA-L is determined by the following critical parameters:

Protocol Compatibility: RS232 full-duplex transceiver with 2/2 driver/receiver configuration
Package Compatibility: 20-SSOP surface mount package (0.209", 5.30mm Width)
Electrical Compatibility: Supply voltage range 3V ~ 5.5V, receiver hysteresis 300 mV or higher
Data Rate: Minimum 235 Kbps support
Operating Temperature: Minimum range 0°C ~ 70°C (extended range acceptable)

Substitute parts are grouped into three categories based on product status and performance characteristics:

Category 1 - Active Status with Extended Temperature Range: ICL3223IAZ, ICL3223IAZ-T, MAX3223EAP+, MAX3223EAP+T. These parts offer active product status and extended operating temperature ranges (-40°C ~ 85°C), providing long-term availability and improved thermal performance.

Category 2 - Active Status with Standard Temperature Range: MAX3223CAP+, MAX3223CAP+T. These parts maintain active status with standard operating temperature range (0°C ~ 70°C), matching the original part's thermal specifications.

Category 3 - Enhanced Performance (Obsolete/Active Mixed): MAX3223EIDB, MAX3223EIDBR, MAX3223CDB, MAX3223CDBR. These parts feature higher receiver hysteresis (500 mV) and increased data rate capability (250 Kbps to 500 Kbps), suitable for applications requiring improved noise immunity or higher throughput.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Protocol	Drivers/Receivers	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temperature	Package	Product Status	Packaging Type
SP3223ECA-L	MaxLinear, Inc.	RS232	2/2	300 mV	235 Kbps	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Obsolete	-
ICL3223IAZ	Renesas Electronics Corporation	RS232	2/2	300 mV	250 Kbps	3V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	Tube
ICL3223IAZ-T	Renesas Electronics Corporation	RS232	2/2	300 mV	250 Kbps	3V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	Tape & Reel (TR)
MAX3223EIDB	Texas Instruments	RS232	2/2	500 mV	500 Kbps	3V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Obsolete	Tube
MAX3223EIDBR	Texas Instruments	RS232	2/2	500 mV	500 Kbps	3V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	Cut Tape (CT) & Digi-Reel®
MAX3223CAP+	Analog Devices Inc./Maxim Integrated	RS232	2/2	300 mV	120 Kbps	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Active	Tube
MAX3223CAP+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	300 mV	120 Kbps	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Active	Cut Tape (CT) & Digi-Reel®
MAX3223CDB	Texas Instruments	RS232	2/2	500 mV	250 Kbps	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Obsolete	Tube
MAX3223CDBR	Texas Instruments	RS232	2/2	500 mV	250 Kbps	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Active	Cut Tape (CT)
MAX3223EAP+	Analog Devices Inc./Maxim Integrated	RS232	2/2	300 mV	120 Kbps	3V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	Tube
MAX3223EAP+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	300 mV	120 Kbps	3V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

For Direct Replacement with Extended Thermal Performance: Select ICL3223IAZ or ICL3223IAZ-T (Renesas Electronics Corporation). Both parts maintain identical receiver hysteresis (300 mV) and supply voltage specifications while offering active product status and extended operating temperature range (-40°C ~ 85°C). ICL3223IAZ-T in Tape & Reel packaging is preferred for high-volume production environments.

For Direct Replacement with Standard Thermal Range: Select MAX3223CAP+ or MAX3223CAP+T (Analog Devices Inc./Maxim Integrated). These parts match the original operating temperature range (0°C ~ 70°C) and receiver hysteresis (300 mV) with active product status. MAX3223CAP+T in Cut Tape & Digi-Reel® packaging supports automated assembly processes.

For Enhanced Noise Immunity Applications: Select MAX3223EIDBR (Texas Instruments) for active product status with 500 mV receiver hysteresis and 500 Kbps data rate capability. This part provides superior noise rejection in electrically noisy environments while maintaining the original supply voltage range and 20-SSOP package footprint.

For Extended Temperature and Standard Hysteresis: Select MAX3223EAP+ or MAX3223EAP+T (Analog Devices Inc./Maxim Integrated). These parts combine active product status, extended operating temperature (-40°C ~ 85°C), and 300 mV receiver hysteresis, suitable for industrial and automotive applications.

All recommended substitutes are ROHS3 compliant and REACH unaffected, meeting modern environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX3223CAP+ be used as a direct replacement for SP3223ECA-L?

A: Yes. MAX3223CAP+ is electrically compatible with identical receiver hysteresis (300 mV), supply voltage range (3V ~ 5.5V), and operating temperature range (0°C ~ 70°C). Both are 2/2 full-duplex RS232 transceivers in 20-SSOP packages. The data rate of 120 Kbps on MAX3223CAP+ is lower than the original 235 Kbps specification; applications requiring the full 235 Kbps bandwidth should select ICL3223IAZ or MAX3223EIDBR instead.

Q: What is the difference between ICL3223IAZ and ICL3223IAZ-T?

A: Both parts are electrically identical with the same specifications. The difference is packaging: ICL3223IAZ is supplied in Tube packaging, while ICL3223IAZ-T is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated pick-and-place assembly in production environments.

Q: Why do some substitutes have higher receiver hysteresis (500 mV) than the original (300 mV)?

A: Receiver hysteresis determines the voltage difference between rising and falling edge thresholds on the receiver input. Higher hysteresis (500 mV) provides improved noise immunity in electrically noisy environments by reducing susceptibility to signal jitter and noise-induced false transitions. Parts like MAX3223EIDBR and MAX3223CDB offer this enhanced specification as an upgrade option.

Q: Is MAX3223EAP+ suitable for industrial temperature applications?

A: Yes. MAX3223EAP+ operates across -40°C ~ 85°C, exceeding the original SP3223ECA-L range of 0°C ~ 70°C. This extended temperature range makes it suitable for industrial, automotive, and outdoor applications requiring operation in extreme thermal conditions.

Q: What packaging options are available for high-volume production?

A: For automated assembly, select parts with Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® packaging: ICL3223IAZ-T, MAX3223CAP+T, MAX3223EAP+T, or MAX3223EIDBR. Tube packaging (ICL3223IAZ, MAX3223CAP+, MAX3223EAP+) is suitable for manual assembly or lower-volume applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification and are REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and use.

Q: Can MAX3223EIDBR be used in applications requiring 235 Kbps data rate?

A: Yes. MAX3223EIDBR supports data rates up to 500 Kbps, exceeding the original 235 Kbps requirement. This part is suitable for applications requiring higher bandwidth while maintaining full RS232 protocol compatibility and 20-SSOP package footprint.

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