MAX3222ECDBR Equivalent & Substitute Parts

Part Overview

The MAX3222ECDBR is a full-duplex RS232 transceiver IC manufactured by Texas Instruments, featuring 2 drivers and 2 receivers in a 20-SSOP surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across a 3V to 5.5V supply range with a 500kbps data rate and 300mV receiver hysteresis, making it suitable for legacy RS232 communication applications requiring compact form factors.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX3222ECDBR
Manufacturer	Texas Instruments
Category	Interface
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	500kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MAX3222ECDBR is determined by strict equivalence across the following critical parameters:

Core Functional Parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage Supply Range: 3V ~ 5.5V
Package Type: 20-SSOP or compatible form factor
Mounting Type: Surface Mount

Performance Parameters (allowable variance):

Data Rate: 500kbps or higher
Receiver Hysteresis: 300mV or higher
Operating Temperature: Must encompass or exceed 0°C ~ 70°C

Substitute parts are grouped into three categories based on their relationship to the main part:

MFR Recommended Substitutes – Active status parts from the original manufacturer (Texas Instruments) with enhanced specifications
Parametric Equivalents – Parts with identical core parameters but different product status or manufacturer
Direct/Upgrade Alternatives – Parts from alternative manufacturers meeting or exceeding functional requirements

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	Operating Temp	Package	Inventory
MAX3222ECDBR	Texas Instruments	Obsolete	500kbps	300mV	0°C ~ 70°C	20-SSOP	827 Pcs
MAX3222EIDBR	Texas Instruments	Active	500kbps	300mV	-40°C ~ 85°C	20-SSOP	4100 Pcs
TRS3222ECDBR	Texas Instruments	Obsolete	500kbps	300mV	0°C ~ 70°C	20-SSOP	3720 Pcs
ICL3222ECAZ	Renesas Electronics	Active	250kbps	500mV	0°C ~ 70°C	20-SSOP	1628 Pcs
ICL3222ECAZ-T	Renesas Electronics	Active	250kbps	500mV	0°C ~ 70°C	20-SSOP	3050 Pcs
ICL3222EIAZ	Renesas Electronics	Active	250kbps	500mV	-40°C ~ 85°C	20-SSOP	1446 Pcs
ICL3222EIAZ-T	Renesas Electronics	Active	250kbps	500mV	-40°C ~ 85°C	20-SSOP	6067 Pcs
ADM3222ARSZ	Analog Devices Inc.	Active	460Kbps	400mV	-40°C ~ 85°C	20-SSOP	12700 Pcs
ADM3222ARSZ-REEL	Analog Devices Inc.	Active	460Kbps	400mV	-40°C ~ 85°C	20-SSOP	1900 Pcs
ADM3222ARSZ-REEL7	Analog Devices Inc.	Active	460Kbps	400mV	-40°C ~ 85°C	20-SSOP	28600 Pcs
ADM3222ARUZ	Analog Devices Inc.	Active	460Kbps	400mV	-40°C ~ 85°C	20-TSSOP	1563 Pcs

Engineering Selection Recommendations

Primary Recommendation: MAX3222EIDBR

The MAX3222EIDBR is the direct active-status successor from Texas Instruments. It maintains identical electrical specifications (500kbps data rate, 300mV receiver hysteresis, 2/2 driver/receiver configuration) while extending the operating temperature range to -40°C ~ 85°C. This part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), matching the original part's compliance profile. With 4100 units in stock, procurement continuity is assured.

Secondary Recommendation: ADM3222ARSZ-REEL7

The ADM3222ARSZ-REEL7 from Analog Devices Inc. provides an active alternative with superior data rate performance (460Kbps versus 500kbps) and extended operating temperature range (-40°C ~ 85°C). The 400mV receiver hysteresis exceeds the original 300mV specification, enhancing noise margin. This part is ROHS3 compliant with MSL 1 rating. Highest inventory availability (28600 units) supports long-term supply security.

Tertiary Recommendation: ICL3222EIAZ-T

The ICL3222EIAZ-T from Renesas Electronics Corporation is an active part with extended temperature range (-40°C ~ 85°C) and ROHS3 compliance. While the data rate is reduced to 250kbps, this remains suitable for legacy RS232 applications. The 500mV receiver hysteresis provides enhanced noise immunity. Tape & Reel packaging (6067 units available) supports automated assembly processes.

Package Consideration:

The ADM3222ARUZ uses a 20-TSSOP package (0.173" width) instead of the standard 20-SSOP (0.209" width). This represents a physical form factor change requiring PCB layout modification and is not recommended as a direct drop-in replacement without design review.

Frequently Asked Questions (FAQ)

Q: Can MAX3222EIDBR directly replace MAX3222ECDBR without design changes?

A: Yes. The MAX3222EIDBR maintains identical electrical specifications and package form factor (20-SSOP). The extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) is a superset of the original specification and poses no compatibility risk. Pin configuration and signal levels remain unchanged.

Q: Why do ICL3222 parts show lower data rates (250kbps versus 500kbps)?

A: The ICL3222 series from Renesas Electronics operates at 250kbps maximum data rate. This is a fundamental specification difference. For applications requiring 500kbps operation, this part is not suitable. However, for legacy RS232 systems typically operating at 9600 to 115200 baud rates, this specification difference is not functionally limiting.

Q: What is the significance of receiver hysteresis differences?

A: Receiver hysteresis determines the voltage differential required to switch logic states, affecting noise immunity. The original MAX3222ECDBR specifies 300mV. Substitute parts with 400mV or 500mV hysteresis provide enhanced noise margin, which is beneficial in electrically noisy environments. Lower hysteresis values would be problematic; higher values are acceptable.

Q: Are ADM3222 parts from Analog Devices pin-compatible?

A: Yes. The ADM3222 series maintains identical pin configuration and signal levels as the MAX3222 series. Both are 20-pin SSOP packages with 2/2 driver/receiver RS232 transceiver architecture. The primary differences are data rate (460Kbps versus 500kbps) and receiver hysteresis (400mV versus 300mV), neither of which affects pin compatibility.

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

A: Cut Tape (CT) & Digi-Reel packaging is available for MAX3222EIDBR, ADM3222ARSZ-REEL, and ADM3222ARSZ-REEL7. Tape & Reel (TR) packaging is available for ICL3222ECAZ-T and ICL3222EIAZ-T. Tube packaging is available for all variants. Selection depends on assembly equipment compatibility and volume requirements.

Q: Is RoHS3 compliance maintained across all substitute parts?

A: Yes. All listed substitute parts carry ROHS3 Compliant certification, matching the original MAX3222ECDBR specification. REACH status is uniformly listed as REACH Unaffected across all parts.

Q: What is the moisture sensitivity level (MSL) difference between parts?

A: Texas Instruments parts (MAX3222 series) and Analog Devices parts (ADM3222 series) carry MSL 1 (Unlimited), indicating no moisture sensitivity constraints. Renesas Electronics parts (ICL3222 series) carry MSL 3 (168 Hours), requiring controlled storage and handling within 168 hours of package opening. This affects supply chain logistics but not electrical performance.

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