SP3222EBCT-L RS232 Transceiver: Equivalent & Substitute Parts

Part Overview

The SP3222EBCT-L is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in an 18-SOIC 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 250 kbps. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Key Parameters

Parameter	SP3222EBCT-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	250 kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	18-SOIC (0.295", 7.50mm Width)
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the SP3222EBCT-L is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

Protocol: RS232 (mandatory)
Number of Drivers/Receivers: 2/2 (mandatory)
Duplex: Full (mandatory)
Voltage - Supply: 3V ~ 5.5V (mandatory)
Package / Case: 18-SOIC (0.295", 7.50mm Width) (mandatory)
Mounting Type: Surface Mount (mandatory)

Allowable Variations:

Receiver Hysteresis: 300 mV to 500 mV (within acceptable signal integrity margins)
Data Rate: 120 kbps to 1 Mbps (backward compatible; higher rates support legacy applications)
Operating Temperature: 0°C ~ 70°C to -40°C ~ 85°C (extended range acceptable for industrial applications)
Packaging Format: Tube, Tape & Reel (TR), or Cut Tape (CT) & Digi-Reel® (form factor variation only)
RoHS Status: RoHS Compliant to ROHS3 Compliant (compliance upgrade acceptable)
MSL: 3 (168 Hours) to 1 (Unlimited) (improved moisture handling acceptable)

All substitute parts listed maintain the 18-SOIC package footprint and surface mount compatibility, ensuring direct PCB layout compatibility without redesign.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temperature	Package	Product Status	RoHS Status
SP3222EBCT-L	MaxLinear, Inc.	RS232	2/2	Full	300 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	18-SOIC	Discontinued	RoHS Compliant
MAX3222ECWN+	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
MAX3222ECWN+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
MAX3222EEWN+	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	500 mV	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
MAX3222EEWN+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	500 mV	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
ADM3222ARWZ	Analog Devices Inc.	RS232	2/2	Full	400 mV	460 kbps	3V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
ADM3222ARWZ-REEL	Analog Devices Inc.	RS232	2/2	Full	400 mV	460 kbps	3V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
ADM3222ARWZ-REEL7	Analog Devices Inc.	RS232	2/2	Full	400 mV	460 kbps	3V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant
MAX3222CWN+	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	300 mV	120 kbps	3V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
MAX3222CWN+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	300 mV	120 kbps	3V ~ 5.5V	0°C ~ 70°C	18-SOIC	Active	ROHS3 Compliant
MAX3222EWN+	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	300 mV	120 kbps	3V ~ 5.5V	-40°C ~ 85°C	18-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Operating Temperature Range):

MAX3222CWN+ and MAX3222CWN+T maintain the original 0°C ~ 70°C operating temperature specification and 300 mV receiver hysteresis, providing the closest functional match to the SP3222EBCT-L. Both are active products with ROHS3 compliance. Selection between tube (MAX3222CWN+) and cut tape (MAX3222CWN+T) packaging depends on procurement and assembly requirements.

Enhanced Performance Substitutes (Extended Temperature Range):

MAX3222EEWN+, MAX3222EEWN+T, ADM3222ARWZ, ADM3222ARWZ-REEL, and ADM3222ARWZ-REEL7 extend the operating temperature range to -40°C ~ 85°C, supporting industrial and automotive applications. These parts are active products with ROHS3 compliance and improved moisture sensitivity levels (MSL 1, Unlimited). The MAX3222EEWN+ series supports 1 Mbps data rates, while the ADM3222ARWZ series supports 460 kbps.

Higher Data Rate Substitutes:

MAX3222ECWN+ and MAX3222ECWN+T support 1 Mbps data rates with 500 mV receiver hysteresis, suitable for applications requiring enhanced noise immunity. Both maintain the 0°C ~ 70°C temperature range and are active products with ROHS3 compliance.

All substitute parts maintain the 18-SOIC package footprint and surface mount compatibility, eliminating PCB redesign requirements. Product status is active for all listed alternatives, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can MAX3222ECWN+ directly replace SP3222EBCT-L in existing designs?

A: Yes. Both parts maintain RS232 protocol, 2/2 driver/receiver configuration, full-duplex operation, 3V ~ 5.5V supply voltage, and 18-SOIC package compatibility. The MAX3222ECWN+ offers higher data rate capability (1 Mbps vs. 250 kbps) and improved receiver hysteresis (500 mV vs. 300 mV), making it functionally compatible for direct substitution.

Q: What is the difference between MAX3222ECWN+ and MAX3222ECWN+T?

A: Both parts are electrically identical. The difference is packaging format: MAX3222ECWN+ is supplied in tube packaging, while MAX3222ECWN+T is supplied in tape & reel format. Selection depends on assembly line requirements and procurement preferences.

Q: Why would I choose ADM3222ARWZ over MAX3222EEWN+?

A: Both parts support -40°C ~ 85°C operating temperature and ROHS3 compliance. The ADM3222ARWZ offers 460 kbps data rate with 400 mV receiver hysteresis, while MAX3222EEWN+ supports 1 Mbps with 500 mV hysteresis. Selection depends on application data rate requirements and noise environment specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original SP3222EBCT-L is RoHS Compliant. All listed substitute parts are ROHS3 Compliant, meeting or exceeding the original compliance standard.

Q: What is the significance of MSL (Moisture Sensitivity Level)?

A: The SP3222EBCT-L has MSL 3 (168 Hours), requiring controlled storage and handling. All substitute parts have MSL 1 (Unlimited), eliminating moisture sensitivity constraints and reducing storage and handling costs.

Q: Can I use MAX3222CWN+ as a long-term replacement for SP3222EBCT-L?

A: Yes. MAX3222CWN+ maintains the original 0°C ~ 70°C operating temperature, 300 mV receiver hysteresis, and 18-SOIC package. It is an active product with ROHS3 compliance and improved MSL rating, making it suitable for long-term production use.

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

A: Tube packaging (standard format) is used for manual assembly and lower-volume applications. Cut tape & Digi-Reel® packaging is optimized for automated pick-and-place assembly. Both formats contain identical parts; selection depends on assembly process requirements.

Q: Do all substitute parts support the same data rates as SP3222EBCT-L?

A: No. The SP3222EBCT-L supports 250 kbps. Substitute parts support 120 kbps (MAX3222CWN+, MAX3222CWN+T, MAX3222EWN+), 460 kbps (ADM3222ARWZ series), or 1 Mbps (MAX3222ECWN+, MAX3222ECWN+T, MAX3222EEWN+, MAX3222EEWN+T). All are backward compatible with legacy 250 kbps applications.

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