MAX3222IPW RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3222IPW is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 20-TSSOP surface mount package. This component operates across a 3V to 5.5V supply range with a 250 kbps data rate and 300 mV receiver hysteresis. The MAX3222IPW is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain functional compatibility across RS232 protocol requirements, electrical specifications, and mechanical packaging constraints.

Key Parameters

Parameter	MAX3222IPW
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Data Rate	250 kbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Receiver Hysteresis	300 mV
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MAX3222IPW are grouped based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Protocol: RS232
Configuration: 2/2 Transceiver (2 drivers, 2 receivers)
Duplex Mode: Full
Voltage Supply Range: 3V ~ 5.5V
Mounting Type: Surface Mount
RoHS3 Compliance

Package-Based Grouping:

Substitutes are organized into two package categories:

20-TSSOP Package (0.173", 4.40mm Width) — Direct mechanical and electrical equivalents to MAX3222IPW
20-SSOP Package (0.209", 5.30mm Width) — Functionally equivalent but with different physical footprint

Secondary Variation Parameters:

Data Rate: 250 kbps (MAX3222IPW) vs. 460 kbps (ADM3222 series)
Receiver Hysteresis: 300 mV (MAX3222IPW, ICL3222CVZ) vs. 400 mV (ADM3222 series) vs. 500 mV (ICL3222ECAZ)
Operating Temperature Range: -40°C ~ 85°C (MAX3222IPW, ADM3222 series) vs. 0°C ~ 70°C (ICL3222 series)
MSL Rating: 1 (Unlimited) vs. 3 (168 Hours)

Parameter Comparison

Part Number	Manufacturer	Package	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	Packaging Type
MAX3222IPW	Texas Instruments	20-TSSOP	250 kbps	300 mV	-40°C ~ 85°C	Obsolete	Surface Mount
ADM3222ARSZ	Analog Devices Inc.	20-SSOP	460 kbps	400 mV	-40°C ~ 85°C	Active	Tube
ADM3222ARSZ-REEL	Analog Devices Inc.	20-SSOP	460 kbps	400 mV	-40°C ~ 85°C	Active	Cut Tape & Digi-Reel
ADM3222ARSZ-REEL7	Analog Devices Inc.	20-SSOP	460 kbps	400 mV	-40°C ~ 85°C	Active	Cut Tape & Digi-Reel
ADM3222ARUZ	Analog Devices Inc.	20-TSSOP	460 kbps	400 mV	-40°C ~ 85°C	Active	Tube
ADM3222ARUZ-REEL	Analog Devices Inc.	20-TSSOP	460 kbps	400 mV	-40°C ~ 85°C	Active	Surface Mount
ADM3222ARUZ-REEL7	Analog Devices Inc.	20-TSSOP	460 kbps	400 mV	-40°C ~ 85°C	Active	Cut Tape & Digi-Reel
ICL3222CVZ	Renesas Electronics Corporation	20-TSSOP	250 kbps	300 mV	0°C ~ 70°C	Active	Tube
ICL3222CVZ-T	Renesas Electronics Corporation	20-TSSOP	250 kbps	300 mV	0°C ~ 70°C	Active	Tape & Reel
ICL3222ECAZ	Renesas Electronics Corporation	20-SSOP	250 kbps	500 mV	0°C ~ 70°C	Active	Tube
ICL3222ECAZ-T	Renesas Electronics Corporation	20-SSOP	250 kbps	500 mV	0°C ~ 70°C	Active	Tape & Reel

Engineering Selection Recommendations

For Direct Package Compatibility (20-TSSOP):

The ADM3222ARUZ series (Analog Devices Inc.) provides active product status with identical 20-TSSOP packaging. These parts support the full -40°C to 85°C operating temperature range matching the MAX3222IPW specification. The ADM3222ARUZ variants offer enhanced data rate capability (460 kbps vs. 250 kbps) while maintaining backward compatibility with RS232 2/2 transceiver functionality. All ADM3222 variants are ROHS3 compliant.

The ICL3222CVZ and ICL3222CVZ-T (Renesas Electronics Corporation) also provide 20-TSSOP packaging with identical receiver hysteresis (300 mV) and data rate (250 kbps) specifications. However, these parts operate within a narrower temperature range (0°C to 70°C) and carry MSL-3 moisture sensitivity rating, which may restrict use in high-temperature or high-humidity storage environments compared to the MAX3222IPW's MSL-1 rating.

For Alternative Package Compatibility (20-SSOP):

The ADM3222ARSZ series provides 20-SSOP packaging with active product status and full temperature range support (-40°C to 85°C). PCB layout redesign is required to accommodate the wider 5.30mm package width. The ICL3222ECAZ series offers 20-SSOP packaging with identical data rate and receiver hysteresis specifications but operates within the 0°C to 70°C temperature range with MSL-3 rating.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original MAX3222IPW specification.

Frequently Asked Questions (FAQ)

Q: Can ADM3222ARUZ directly replace MAX3222IPW without PCB modification?

A: Yes. The ADM3222ARUZ maintains identical 20-TSSOP package geometry (0.173", 4.40mm width), pinout compatibility, and operating voltage range (3V ~ 5.5V). No PCB layout changes are required. The enhanced data rate (460 kbps vs. 250 kbps) and receiver hysteresis (400 mV vs. 300 mV) do not prevent functional substitution in RS232 applications.

Q: What is the difference between ADM3222ARUZ and ADM3222ARSZ?

A: The primary difference is package type. ADM3222ARUZ uses 20-TSSOP packaging (0.173" width), while ADM3222ARSZ uses 20-SSOP packaging (0.209" width). Both maintain identical electrical specifications and operating ranges. Package selection depends on PCB footprint availability and design constraints.

Q: Why do ICL3222 parts have a narrower operating temperature range?

A: The ICL3222 series (Renesas Electronics Corporation) operates from 0°C to 70°C, compared to the MAX3222IPW range of -40°C to 85°C. This narrower specification may limit use in industrial or automotive applications requiring extended temperature performance. Verify application temperature requirements before selection.

Q: What does MSL-3 (168 Hours) mean for ICL3222 parts?

A: MSL-3 indicates moisture sensitivity level 3, with a floor life of 168 hours after package opening. This requires stricter moisture control during storage and assembly compared to MAX3222IPW's MSL-1 (unlimited) rating. ICL3222 parts must be stored in dry conditions and used within the specified floor life window.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (ADM3222 and ICL3222 series) maintain ROHS3 compliance consistent with the MAX3222IPW specification.

Q: Can I use 20-SSOP packages as substitutes if my PCB has 20-TSSOP footprints?

A: No. The 20-SSOP package (0.209", 5.30mm width) has different physical dimensions and pinout spacing compared to 20-TSSOP (0.173", 4.40mm width). PCB redesign is required to accommodate 20-SSOP parts. Use 20-TSSOP substitutes (ADM3222ARUZ, ICL3222CVZ) for direct footprint compatibility.

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