MAX3222CAP RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3222CAP is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-SSOP package. This interface IC operates across a 3V to 5.5V supply range and supports data rates up to 120 Kbps with a 300 mV receiver hysteresis specification. The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Key Parameters

Parameter	Specification
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	120 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)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX3222CAP is determined by the following critical parameters:

Protocol: RS232 full-duplex transceiver with 2/2 driver/receiver configuration
Supply voltage range: 3V ~ 5.5V
Package compatibility: 20-SSOP or 20-TSSOP surface mount packages
Receiver hysteresis: 300 mV or higher
Data rate capability: Minimum 120 Kbps
Operating temperature: Minimum 0°C ~ 70°C range
Surface mount technology requirement

Substitute parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications and package footprint (20-SSOP), differing only in product status and RoHS compliance.

Manufacturer Recommended Substitutes offer enhanced performance characteristics (higher data rates, extended temperature ranges, improved receiver hysteresis) while maintaining core RS232 transceiver functionality and surface mount compatibility. These include both 20-SSOP and 20-TSSOP package variants.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Receiver Hysteresis	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status
MAX3222CAP	Analog Devices Inc./Maxim Integrated	RS232	2/2	120 Kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Obsolete	RoHS non-compliant
MAX3222CAP+	Analog Devices Inc./Maxim Integrated	RS232	2/2	120 Kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Active	ROHS3 Compliant
MAX3223CAP+	Analog Devices Inc./Maxim Integrated	RS232	2/2	120 Kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Active	ROHS3 Compliant
ADM3222ARSZ	Analog Devices Inc.	RS232	2/2	460 Kbps	400 mV	3V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	ROHS3 Compliant
ADM3222ARSZ-REEL	Analog Devices Inc.	RS232	2/2	460 Kbps	400 mV	3V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	ROHS3 Compliant
ADM3222ARSZ-REEL7	Analog Devices Inc.	RS232	2/2	460 Kbps	400 mV	3V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	ROHS3 Compliant
ADM3222ARUZ	Analog Devices Inc.	RS232	2/2	460 Kbps	400 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	ROHS3 Compliant
ADM3222ARUZ-REEL	Analog Devices Inc.	RS232	2/2	460 Kbps	400 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	ROHS3 Compliant
ADM3222ARUZ-REEL7	Analog Devices Inc.	RS232	2/2	460 Kbps	400 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	ROHS3 Compliant
ICL3222CVZ	Renesas Electronics Corporation	RS232	2/2	250 Kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	ROHS3 Compliant
ICL3222CVZ-T	Renesas Electronics Corporation	RS232	2/2	250 Kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement of the obsolete MAX3222CAP in existing designs, MAX3222CAP+ or MAX3223CAP+ are the primary choices. Both maintain identical electrical specifications and 20-SSOP package footprint while offering active product status and ROHS3 compliance.

For new designs or applications requiring enhanced performance, the ADM3222 series (ARSZ, ARSZ-REEL, ARSZ-REEL7, ARUZ, ARUZ-REEL, ARUZ-REEL7) provides superior data rate capability (460 Kbps versus 120 Kbps), extended operating temperature range (-40°C to 85°C), and improved receiver hysteresis (400 mV). These parts maintain full RS232 2/2 transceiver functionality and are available in both 20-SSOP and 20-TSSOP packages with ROHS3 compliance.

The ICL3222CVZ and ICL3222CVZ-T from Renesas Electronics offer an alternative from a different manufacturer while maintaining the original operating temperature range and receiver hysteresis. Data rate capability is 250 Kbps, exceeding the original specification. These parts are available only in 20-TSSOP package configuration.

All recommended substitutes maintain the 3V to 5.5V supply voltage range and full-duplex RS232 protocol compliance required for functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can MAX3222CAP+ be used as a direct replacement for MAX3222CAP?

A: Yes. MAX3222CAP+ maintains identical electrical specifications, package footprint (20-SSOP), and functional characteristics. The primary differences are active product status and ROHS3 compliance.

Q: What is the difference between 20-SSOP and 20-TSSOP packages?

A: Both are surface mount packages with 20 pins. The 20-SSOP has a 0.209" (5.30mm) width, while the 20-TSSOP has a 0.173" (4.40mm) width. PCB layout and footprint designs differ between these packages and are not interchangeable without redesign.

Q: Can ADM3222ARSZ replace MAX3222CAP in existing designs?

A: ADM3222ARSZ is functionally compatible for RS232 2/2 transceiver applications and maintains the same 20-SSOP package footprint. However, it offers enhanced specifications (460 Kbps data rate, -40°C to 85°C operating range, 400 mV hysteresis). Designs operating within the original MAX3222CAP specifications will function correctly with ADM3222ARSZ.

Q: Why are there multiple ADM3222 part numbers with different suffixes?

A: Suffix variations indicate packaging and tape/reel configurations. ARSZ is tube packaging, ARSZ-REEL and ARSZ-REEL7 are cut tape and Digi-Reel options. ARUZ variants use the 20-TSSOP package instead of 20-SSOP. Electrical specifications remain identical across these variants.

Q: Is ICL3222CVZ compatible with MAX3222CAP?

A: ICL3222CVZ is functionally compatible for RS232 2/2 transceiver applications with identical operating temperature range and receiver hysteresis. However, it is available only in 20-TSSOP package, requiring PCB redesign if the original design uses 20-SSOP footprint. Data rate capability is 250 Kbps, exceeding the original 120 Kbps specification.

Q: What does RoHS compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. The original MAX3222CAP is RoHS non-compliant. For applications requiring RoHS compliance, MAX3222CAP+, MAX3223CAP+, ADM3222 series, and ICL3222 series are all ROHS3 compliant alternatives.

Q: Can I use parts with extended temperature ranges in designs specified for 0°C to 70°C?

A: Yes. Parts rated for -40°C to 85°C (such as ADM3222 series) exceed the original temperature specification and are fully compatible with designs requiring 0°C to 70°C operation.

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