MAX3224CAP RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3224CAP 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 identification of active equivalent and substitute parts essential for ongoing design support and production continuity.

Key Parameters

Parameter	Specification
Manufacturer Part Number	MAX3224CAP
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 to 5.5V
Operating Temperature	0°C to 70°C
Receiver Hysteresis	500 mV
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX3224CAP is determined by strict equivalence across the following critical parameters:

Protocol & Configuration: RS232 full-duplex transceiver with 2 drivers and 2 receivers
Electrical Performance: 250 kbps data rate, 500 mV receiver hysteresis, 3V to 5.5V supply voltage
Package Compatibility: 20-SSOP surface mount package (0.209", 5.30mm width)
Operating Temperature Range: Minimum 0°C to 70°C (extended range variants acceptable)
Regulatory Compliance: RoHS and REACH status

Substitute parts are grouped into three categories:

Parametric Equivalents (Same Electrical Specifications): MAX3224CAP+, MAX3224ECAP+, ICL3222ECAZ, ICL3223ECAZ
Manufacturer Recommended Alternatives (Active Status): ICL3224EIAZ, ICL3224EIAZ-T, SN75C3223EDB, SN75C3223EDBR
Cross-Manufacturer Options (Extended Temperature Range): SN65C3223EPW, SN75C3223EPW

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Operating Temp	Package	Packaging Type	RoHS Status	MSL
MAX3224CAP	Analog Devices/Maxim	Obsolete	250 kbps	0°C to 70°C	20-SSOP	Tube	Non-compliant	1
MAX3224CAP+	Analog Devices/Maxim	Active	250 kbps	0°C to 70°C	20-SSOP	Tube	ROHS3 Compliant	1
MAX3224ECAP+	Analog Devices/Maxim	Active	250 kbps	0°C to 70°C	20-SSOP	Tube	ROHS3 Compliant	1
ICL3224EIAZ	Renesas Electronics	Active	250 kbps	-40°C to 85°C	20-SSOP	Tube	ROHS3 Compliant	2
ICL3224EIAZ-T	Renesas Electronics	Active	250 kbps	-40°C to 85°C	20-SSOP	Tape & Reel	ROHS3 Compliant	2
SN75C3223EDB	Texas Instruments	Last Time Buy	1 Mbps	0°C to 70°C	20-SSOP	Tube	ROHS3 Compliant	1
SN75C3223EDBR	Texas Instruments	Last Time Buy	1 Mbps	0°C to 70°C	20-SSOP	Tape & Reel	ROHS3 Compliant	1
ICL3222ECAZ	Renesas Electronics	Active	250 kbps	0°C to 70°C	20-SSOP	Tube	ROHS3 Compliant	3
ICL3223ECAZ	Renesas Electronics	Obsolete	250 kbps	0°C to 70°C	20-SSOP	Tube	ROHS3 Compliant	3
SN65C3223EPW	Texas Instruments	Obsolete	1 Mbps	-40°C to 85°C	20-TSSOP	Tube	ROHS3 Compliant	1
SN75C3223EPW	Texas Instruments	Obsolete	1 Mbps	0°C to 70°C	20-TSSOP	Tube	ROHS3 Compliant	1

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs)

MAX3224CAP+ and MAX3224ECAP+ are direct parametric equivalents manufactured by Analog Devices/Maxim Integrated. Both maintain identical electrical specifications and 20-SSOP packaging while offering active product status and ROHS3 compliance. These parts eliminate obsolescence risk and satisfy modern regulatory requirements.

Secondary Substitutes (Active Alternatives)

ICL3224EIAZ and ICL3224EIAZ-T (Renesas Electronics) provide extended operating temperature range (-40°C to 85°C) compared to the original specification (0°C to 70°C). Both maintain 250 kbps data rate and 20-SSOP packaging with active product status and ROHS3 compliance. The -T variant is supplied in Tape & Reel packaging for automated assembly.

Tertiary Substitutes (Last Time Buy / Obsolete Status)

SN75C3223EDB and SN75C3223EDBR (Texas Instruments) offer higher data rate capability (1 Mbps versus 250 kbps) within the same 20-SSOP package and operating temperature range. Both carry Last Time Buy status, indicating limited availability. SN75C3223EDBR is supplied in Tape & Reel format.

Package Variant Consideration

SN65C3223EPW and SN75C3223EPW use 20-TSSOP packaging (0.173", 4.40mm width) instead of 20-SSOP, requiring PCB layout modification. Both are obsolete and offer 1 Mbps data rate with extended temperature range.

Frequently Asked Questions (FAQ)

Q: Can MAX3224CAP+ be used as a direct replacement for MAX3224CAP?

A: Yes. MAX3224CAP+ is a parametric equivalent with identical electrical specifications, data rate (250 kbps), supply voltage range (3V to 5.5V), operating temperature (0°C to 70°C), and 20-SSOP packaging. The primary difference is active product status and ROHS3 compliance versus the obsolete, non-compliant original.

Q: What is the difference between ICL3224EIAZ and ICL3224EIAZ-T?

A: Both parts are electrically identical with active status and ROHS3 compliance. ICL3224EIAZ is supplied in Tube packaging, while ICL3224EIAZ-T is supplied in Tape & Reel (TR) format for automated pick-and-place assembly. The -T variant is preferred for high-volume production.

Q: Can SN75C3223EDB replace MAX3224CAP in existing designs?

A: SN75C3223EDB maintains the same 20-SSOP package, 3V to 5.5V supply range, and 0°C to 70°C operating temperature. However, it offers 1 Mbps data rate versus 250 kbps. This higher performance is backward compatible with designs expecting 250 kbps operation. The part carries Last Time Buy status, limiting future availability.

Q: Why do SN65C3223EPW and SN75C3223EPW use different packaging?

A: Both use 20-TSSOP packaging (0.173", 4.40mm width) instead of 20-SSOP (0.209", 5.30mm width). This narrower package requires PCB layout redesign and is not a direct mechanical substitute. Both parts are obsolete.

Q: What does MSL (Moisture Sensitivity Level) mean for component selection?

A: MSL indicates moisture sensitivity during storage and handling. MAX3224CAP and most substitutes carry MSL 1 (Unlimited shelf life). ICL3224EIAZ carries MSL 2 (1 Year), and ICL3222ECAZ carries MSL 3 (168 Hours), requiring stricter moisture control during storage and assembly.

Q: Are all substitute parts ROHS3 compliant?

A: All active and Last Time Buy substitutes listed are ROHS3 compliant. The original MAX3224CAP is RoHS non-compliant. Modern designs should prioritize ROHS3-compliant alternatives.

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