SP3226ECA-L RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP3226ECA-L is a full-duplex RS232 transceiver manufactured by MaxLinear, Inc., designed for serial communication applications requiring 1/1 driver/receiver configuration. This component operates across a 3V to 5.5V supply range with a 250 kbps data rate and is housed in a 16-SSOP surface mount package. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional and electrical compatibility for ongoing production and maintenance applications.

Key Parameters

Parameter	SP3226ECA-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	1/1
Duplex	Full
Data Rate	250 kbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package	16-SSOP (0.209", 5.30mm Width)
Receiver Hysteresis	500 mV
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SP3226ECA-L is determined by strict equivalence across the following critical parameters:

Protocol: RS232 full-duplex transceiver
Configuration: 1/1 driver/receiver
Data Rate: 250 kbps minimum
Voltage Supply Range: 3V ~ 5.5V compatibility
Package: 16-SSOP surface mount
Receiver Hysteresis: 500 mV
Electrical Performance: Equivalent signal characteristics

Substitute parts are grouped into two categories based on operating temperature range and product status:

Category A - Extended Temperature Range (Active Status): Parts with -40°C ~ 85°C operating range, suitable for applications requiring broader environmental tolerance. These include ICL3226EIAZ, ICL3226EIAZ-T, ICL3226IAZ, and ICL3226IAZ-T from Renesas Electronics and Intersil.

Category B - Standard Temperature Range (Active Status): Parts with 0°C ~ 70°C operating range, matching the original SP3226ECA-L temperature specification. These include MAX3221ECDBR and MAX3226CAE+T from Analog Devices/Maxim Integrated and Texas Instruments.

Category C - Restricted Voltage Supply (Active Status): Parts with 4.5V ~ 5.5V supply range, narrower than the original 3V ~ 5.5V specification. These include MAX221ECAE+, MAX221ECAE+T, MAX221EEAE+, and MAX221EEAE+T from Analog Devices/Maxim Integrated.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Voltage Supply	Operating Temp	Package	Product Status	Packaging Option
SP3226ECA-L	MaxLinear, Inc.	RS232	1/1	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Obsolete	—
ICL3226EIAZ	Renesas Electronics	RS232	1/1	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	Tube
ICL3226EIAZ-T	Renesas Electronics	RS232	1/1	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	Tape & Reel
ICL3226IAZ	Intersil	RS232	1/1	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	Bulk
ICL3226IAZ-T	Renesas Electronics	RS232	1/1	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	Tape & Reel
MAX221ECAE+	Analog Devices/Maxim	RS232	1/1	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	Tube
MAX221ECAE+T	Analog Devices/Maxim	RS232	1/1	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	Cut Tape & Digi-Reel
MAX221EEAE+	Analog Devices/Maxim	RS232	1/1	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	Tube
MAX221EEAE+T	Analog Devices/Maxim	RS232	1/1	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	Tape & Reel
MAX3221ECDBR	Texas Instruments	RS232	1/1	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	Cut Tape & Digi-Reel
MAX3226CAE+T	Analog Devices/Maxim	RS232	1/1	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	Cut Tape & Digi-Reel

Engineering Selection Recommendations

Primary Substitutes (Full Compatibility):

ICL3226EIAZ and ICL3226EIAZ-T from Renesas Electronics provide direct functional equivalence with extended operating temperature range (-40°C ~ 85°C), maintaining the full 3V ~ 5.5V supply voltage specification. Both parts are ROHS3 compliant and carry active product status. ICL3226IAZ from Intersil offers identical electrical specifications with bulk packaging availability. These three options are recommended for applications where the extended temperature range provides operational advantage without design modification.

MAX3221ECDBR from Texas Instruments and MAX3226CAE+T from Analog Devices/Maxim Integrated maintain the original 0°C ~ 70°C operating temperature range and 3V ~ 5.5V supply specification, providing direct replacement capability. Both are ROHS3 compliant with active product status and represent the closest functional match to the obsolete SP3226ECA-L.

Secondary Substitutes (Voltage Supply Limitation):

MAX221ECAE+, MAX221ECAE+T, MAX221EEAE+, and MAX221EEAE+T from Analog Devices/Maxim Integrated are suitable only for applications operating within the 4.5V ~ 5.5V supply range. These parts offer extended temperature range (-40°C ~ 85°C) and ROHS3 compliance but are not compatible with 3V supply applications. Selection of these parts requires confirmation that the target application does not require operation below 4.5V.

Packaging Considerations:

Tube packaging (ICL3226EIAZ, MAX221ECAE+, MAX221EEAE+) is suitable for lower-volume applications and manual assembly. Tape & Reel packaging (ICL3226EIAZ-T, ICL3226IAZ-T, MAX221ECAE+T, MAX221EEAE+T, MAX3226CAE+T) is optimized for automated pick-and-place assembly. Bulk packaging (ICL3226IAZ) is available for high-volume procurement.

Frequently Asked Questions (FAQ)

Q: Can the SP3226ECA-L be directly replaced with any of the listed substitutes?

A: Direct replacement depends on application voltage requirements. ICL3226EIAZ, ICL3226EIAZ-T, ICL3226IAZ, ICL3226IAZ-T, MAX3221ECDBR, and MAX3226CAE+T maintain full 3V ~ 5.5V supply compatibility. MAX221 series parts are limited to 4.5V ~ 5.5V operation and require voltage specification verification before substitution.

Q: What is the difference between ICL3226EIAZ and ICL3226EIAZ-T?

A: Both parts are electrically identical. The primary difference is packaging format: ICL3226EIAZ is supplied in Tube packaging, while ICL3226EIAZ-T is supplied in Tape & Reel format. Selection depends on assembly process requirements and volume considerations.

Q: Why do some substitutes have extended temperature range (-40°C ~ 85°C) while the original operates at 0°C ~ 70°C?

A: Extended temperature range parts (ICL3226 series) are manufactured to more stringent specifications and are suitable for applications requiring broader environmental tolerance. These parts are fully compatible with the original 0°C ~ 70°C specification and provide additional operational margin for demanding environments.

Q: Are all substitute parts ROHS3 compliant?

A: All listed active substitute parts carry ROHS3 compliance certification. The original SP3226ECA-L, being obsolete, does not carry current compliance documentation.

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

A: Tape & Reel packaging (ICL3226EIAZ-T, ICL3226IAZ-T, MAX221ECAE+T, MAX221EEAE+T, MAX3226CAE+T) is optimized for automated assembly. ICL3226IAZ offers bulk packaging for maximum volume efficiency.

Q: Can MAX221 series parts be used in applications requiring 3V supply operation?

A: No. MAX221 series parts specify a minimum supply voltage of 4.5V and are not rated for 3V operation. Applications requiring 3V supply must use ICL3226, MAX3221ECDBR, or MAX3226CAE+T alternatives.

Q: What is the significance of the receiver hysteresis specification?

A: The 500 mV receiver hysteresis specification is consistent across all substitute parts and the original component. This parameter ensures reliable signal detection and noise immunity in RS232 communication and is a key criterion for functional equivalence.

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