MAX222CDWR Equivalent & Substitute Parts

Part Overview

The MAX222CDWR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in an 18-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MAX222CDWR operates within a 4.5V to 5.5V supply range with a 200 kbps data rate and 500 mV receiver hysteresis, serving as a standard interface solution for RS232 serial communication applications.

Key Parameters

Parameter	MAX222CDWR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Data Rate	200 kbps
Voltage Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package	18-SOIC (0.295", 7.50mm Width)
Receiver Hysteresis	500 mV
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the MAX222CDWR is determined by the following critical parameters: RS232 protocol compliance, 2/2 driver/receiver configuration, full-duplex operation, 18-SOIC package footprint, 4.5V to 5.5V supply voltage range, and surface mount technology. Substitute parts are grouped into three categories based on their relationship to the original specification:

Direct Manufacturer Equivalents maintain identical electrical and mechanical specifications, including the same 18-SOIC package, 500 mV receiver hysteresis, and operating temperature range. These parts are pin-compatible and functionally interchangeable.

MFR Recommended Substitutes offer enhanced specifications while maintaining core compatibility. These parts retain the 18-SOIC package and RS232 protocol but may feature extended operating temperature ranges (-40°C to 85°C), improved receiver hysteresis (400 mV), or higher data rates (250 kbps). These upgrades provide superior performance without requiring circuit redesign.

Parametric Equivalents maintain the same package, protocol, and electrical supply range but may differ in secondary parameters such as data rate or receiver hysteresis. These parts are suitable for applications where the enhanced specifications of the original design are not required.

Parameter Comparison

Part Number	Manufacturer	Product Status	Package	Data Rate	Operating Temp	Receiver Hysteresis	Voltage Supply	Drivers/Receivers
MAX222CDWR	Texas Instruments	Obsolete	18-SOIC	200 kbps	0°C ~ 70°C	500 mV	4.5V ~ 5.5V	2/2
MAX232EIDWR	Texas Instruments	Active	16-SOIC	250 kbps	-40°C ~ 85°C	500 mV	4.5V ~ 5.5V	2/2
MAX222EWN+	Analog Devices Inc./Maxim Integrated	Active	18-SOIC	250 kbps	-40°C ~ 85°C	500 mV	4.5V ~ 5.5V	2/2
MAX222EWN+T	Analog Devices Inc./Maxim Integrated	Active	18-SOIC	250 kbps	-40°C ~ 85°C	500 mV	4.5V ~ 5.5V	2/2
ADM222ARZ	Analog Devices Inc.	Active	18-SOIC	200 kbps	-40°C ~ 85°C	400 mV	4.5V ~ 5.5V	2/2
ADM222ARZ-REEL	Analog Devices Inc.	Active	18-SOIC	200 kbps	-40°C ~ 85°C	400 mV	4.5V ~ 5.5V	2/2
LT1080ISW#PBF	Analog Devices Inc.	Active	18-SOIC	250 kbps	-40°C ~ 85°C	400 mV	4.5V ~ 5.5V	2/2
LT1080ISW#TRPBF	Analog Devices Inc.	Active	18-SOIC	250 kbps	-40°C ~ 85°C	400 mV	4.5V ~ 5.5V	2/2
MAX222CWN+	Analog Devices Inc./Maxim Integrated	Active	18-SOIC	250 kbps	0°C ~ 70°C	500 mV	4.5V ~ 5.5V	2/2
MAX222CWN+T	Analog Devices Inc./Maxim Integrated	Active	18-SOIC	250 kbps	0°C ~ 70°C	500 mV	4.5V ~ 5.5V	2/2
MAX242CWN+T	Analog Devices Inc./Maxim Integrated	Active	18-SOIC	200 kbps	0°C ~ 70°C	500 mV	4.5V ~ 5.5V	2/2

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement: MAX222EWN+ and MAX222EWN+T are direct equivalents in the 18-SOIC package with identical pinout. Both parts are active products from Analog Devices Inc./Maxim Integrated with ROHS3 compliance and unlimited moisture sensitivity rating. These parts offer improved data rate (250 kbps) and extended operating temperature range (-40°C to 85°C) compared to the obsolete MAX222CDWR.

For Extended Temperature Range Applications: ADM222ARZ and ADM222ARZ-REEL provide active product status with -40°C to 85°C operating range in the same 18-SOIC package. These parts maintain 200 kbps data rate matching the original specification and feature 400 mV receiver hysteresis. The ADM222ARZ-REEL variant is available in cut tape packaging.

For High-Speed Applications: LT1080ISW#PBF and LT1080ISW#TRPBF support 250 kbps data rate with -40°C to 85°C operating range in 18-SOIC packages. These parts are active products with ROHS3 compliance and feature 400 mV receiver hysteresis.

For Identical Operating Temperature Specification: MAX222CWN+ and MAX222CWN+T maintain the 0°C to 70°C operating range of the original part while offering 250 kbps data rate and active product status. Both are available in 18-SOIC packages with ROHS3 compliance.

For Parametric Equivalence: MAX242CWN+T matches the original 200 kbps data rate and 0°C to 70°C operating temperature range in an 18-SOIC package with active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can MAX222EWN+ directly replace MAX222CDWR without circuit modification?

A: Yes. MAX222EWN+ and MAX222EWN+T are pin-compatible direct equivalents in the 18-SOIC package. Both maintain the 2/2 full-duplex RS232 configuration, 4.5V to 5.5V supply voltage, and identical pinout. The improved data rate (250 kbps) and extended operating temperature range (-40°C to 85°C) are backward compatible with designs specified for the original part.

Q: What is the difference between ADM222ARZ and ADM222ARZ-REEL?

A: Both parts are electrically identical Analog Devices Inc. products with identical specifications. The primary difference is packaging: ADM222ARZ is supplied in tube packaging, while ADM222ARZ-REEL is supplied in cut tape format. Selection depends on production volume and assembly line requirements.

Q: Why does MAX232EIDWR use a 16-SOIC package instead of 18-SOIC?

A: MAX232EIDWR is a different device variant with a 16-pin package configuration. While it maintains RS232 protocol compliance and 2/2 driver/receiver configuration, the different package footprint requires PCB layout modification and is not a direct pin-compatible replacement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the original MAX222CDWR.

Q: Which substitute part offers the best performance upgrade?

A: LT1080ISW#PBF and LT1080ISW#TRPBF offer the highest data rate (250 kbps) combined with extended operating temperature range (-40°C to 85°C) and active product status. These parts provide the most comprehensive performance enhancement while maintaining 18-SOIC package compatibility.

Q: Can I use MAX242CWN+T as a substitute?

A: Yes. MAX242CWN+T is a parametric equivalent maintaining the original 200 kbps data rate and 0°C to 70°C operating temperature range in an 18-SOIC package. It is suitable for applications where the original thermal and speed specifications are required.

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