MAX3224ECAP RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3224ECAP is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-SSOP surface mount package. This interface IC operates across a 3V to 5.5V supply range with a 250 kbps data rate and 500 mV receiver hysteresis. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, redesigns, and production continuity. Active alternatives from Analog Devices, Renesas Electronics, and Texas Instruments provide functional equivalence with improved product status and compliance certifications.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	250 kbps
Voltage Supply Range	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Receiver Hysteresis	500 mV
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX3224ECAP is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Package / Case: 20-SSOP (0.209", 5.30mm Width)
Mounting Type: Surface Mount
Receiver Hysteresis: 500 mV
Voltage Supply Range: 3V ~ 5.5V (minimum overlap required)

Allowable Variations:

Data Rate: 250 kbps or higher
Operating Temperature: May extend beyond 0°C ~ 70°C range
Product Status: Active preferred over obsolete
RoHS Compliance: ROHS3 compliant variants preferred
Packaging Format: Tube, Cut Tape (CT), or Tape & Reel (TR)
Moisture Sensitivity Level: 1 or 2 acceptable

Substitute parts must maintain identical electrical functionality within the RS232 2/2 full-duplex transceiver category and fit the 20-SSOP package footprint without PCB redesign.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Operating Temp	RoHS Status	Packaging	MSL
MAX3224ECAP	Analog Devices	Obsolete	250 kbps	0°C ~ 70°C	RoHS non-compliant	Not specified	1
MAX3224CAP+	Analog Devices	Active	250 kbps	0°C ~ 70°C	ROHS3 Compliant	Tube	1
MAX3224ECAP+	Analog Devices	Active	250 kbps	0°C ~ 70°C	ROHS3 Compliant	Tube	1
ICL3225EIAZ	Renesas Electronics	Active	250 kbps	-40°C ~ 85°C	ROHS3 Compliant	Tube	2
MAX3223CDBR	Texas Instruments	Obsolete	250 kbps	0°C ~ 70°C	ROHS3 Compliant	Cut Tape (CT)	1
ICL3224EIAZ	Renesas Electronics	Active	250 kbps	-40°C ~ 85°C	ROHS3 Compliant	Tube	2
ICL3224EIAZ-T	Renesas Electronics	Active	250 kbps	-40°C ~ 85°C	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®	2
ICL3225ECAZ-T	Renesas Electronics	Active	250 kbps	0°C ~ 70°C	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®	2
ICL3225EIAZ-T	Renesas Electronics	Active	250 kbps	-40°C ~ 85°C	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®	2
MAX3223ECDB	Texas Instruments	Obsolete	500 kbps	0°C ~ 70°C	ROHS3 Compliant	Tube	1
MAX3223ECDBR	Texas Instruments	Obsolete	500 kbps	0°C ~ 70°C	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®	1

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

MAX3224CAP+ and MAX3224ECAP+ are direct parametric equivalents manufactured by Analog Devices. Both maintain identical electrical specifications (250 kbps, 0°C ~ 70°C, 500 mV hysteresis) and 20-SSOP packaging. Both are active products with ROHS3 compliance, eliminating obsolescence risk. MAX3224ECAP+ offers higher inventory availability (5490 units) compared to MAX3224CAP+ (2100 units).

Secondary Substitutes (Extended Temperature Range):

ICL3224EIAZ, ICL3224EIAZ-T, ICL3225EIAZ, and ICL3225EIAZ-T from Renesas Electronics provide extended operating temperature ranges (-40°C ~ 85°C) while maintaining all critical electrical parameters. These parts are active, ROHS3 compliant, and suitable for applications requiring wider thermal operating windows. Moisture sensitivity level increases to 2 (1 Year) for Renesas variants.

Temperature-Matched Alternatives:

ICL3225ECAZ-T matches the original 0°C ~ 70°C operating temperature range while providing active product status and ROHS3 compliance. This part is suitable for direct replacement in systems with identical thermal requirements.

Obsolete Alternatives (Not Recommended for New Designs):

MAX3223CDBR, MAX3223ECDB, and MAX3223ECDBR are obsolete products from Texas Instruments. While electrically compatible, these parts should not be selected for new designs or long-term production due to end-of-life status. Existing inventory may support legacy system repairs only.

Frequently Asked Questions (FAQ)

Q: Can I use ICL3225EIAZ-T as a direct replacement for MAX3224ECAP?

A: Yes. ICL3225EIAZ-T is electrically equivalent within the RS232 2/2 full-duplex transceiver category. Both parts share identical protocol, driver/receiver configuration, duplex mode, receiver hysteresis, data rate, supply voltage range, and 20-SSOP package footprint. The Renesas part offers extended operating temperature (-40°C ~ 85°C) and active product status. No PCB modifications are required.

Q: What is the difference between MAX3224CAP+ and MAX3224ECAP+?

A: Both are parametric equivalents with identical electrical specifications and active product status. The primary difference is packaging format: MAX3224CAP+ ships in Tube packaging, while MAX3224ECAP+ ships in Tube packaging. Both are ROHS3 compliant with MSL 1 (Unlimited). Selection depends on procurement and assembly requirements.

Q: Why do some substitutes have higher data rates (500 kbps vs. 250 kbps)?

A: Higher data rate capability does not affect compatibility. A 500 kbps transceiver operates correctly at 250 kbps. The MAX3223ECDB and MAX3223ECDBR variants support faster communication but are backward compatible with 250 kbps systems. These parts are obsolete and not recommended for new applications.

Q: Are Renesas ICL3224 and ICL3225 parts interchangeable?

A: ICL3224EIAZ and ICL3225EIAZ are both active Renesas alternatives with identical electrical parameters and 20-SSOP packaging. Both support 250 kbps RS232 2/2 full-duplex operation. Selection between them depends on extended temperature requirements (ICL3225 supports -40°C ~ 85°C) and inventory availability.

Q: What does MSL 2 (1 Year) mean for moisture sensitivity?

A: Moisture Sensitivity Level 2 indicates the component requires controlled storage conditions with a 1-year shelf life limit from the date of manufacture. MSL 1 (Unlimited) parts like the original MAX3224ECAP have no time-based storage restrictions. For high-volume production, verify storage and handling procedures when transitioning to MSL 2 components.

Q: Can I use MAX3223ECDBR in a new product design?

A: No. MAX3223ECDBR is classified as obsolete and should not be selected for new designs. While electrically compatible, obsolete parts present supply chain risk and may become unavailable. Select active alternatives such as MAX3224ECAP+, ICL3224EIAZ, or ICL3225EIAZ-T instead.

Q: What packaging formats are available for substitutes?

A: Substitutes are available in three formats: Tube (standard packaging for component trays), Cut Tape (CT) for automated pick-and-place assembly, and Tape & Reel (TR) for high-volume production. Cut Tape & Digi-Reel® variants combine both formats. Selection depends on assembly process and volume requirements.

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