MAX232IDWRG4 Equivalent & Substitute Parts

Part Overview

The MAX232IDWRG4 is a 2/2 full-duplex RS232 transceiver in 16-SOIC surface mount packaging manufactured by Texas Instruments. This interface IC operates across the 4.5V to 5.5V supply range with a 120 kbps data rate and 500 mV receiver hysteresis, designed for serial communication applications requiring RS232 protocol compliance.

The MAX232IDWRG4 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this transceiver topology.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX232IDWRG4
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	120 kbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the MAX232IDWRG4 is determined by the following critical parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Package / Case: 16-SOIC (0.295", 7.50mm Width)
Voltage - Supply: 4.5V ~ 5.5V
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into the following categories:

Parametric Equivalents maintain identical electrical and mechanical specifications across all critical parameters, including receiver hysteresis (500 mV), data rate (120 kbps), and operating temperature range (-40°C ~ 85°C). These parts are direct functional replacements.

Direct Manufacturer Equivalents share the same base product number (MAX232) with identical parametric specifications but differ in packaging format (Tube vs. Cut Tape & Digi-Reel).

Upgrade Parts maintain core RS232 2/2 transceiver functionality and package compatibility but may feature extended operating temperature ranges (-55°C ~ 125°C) or different temperature grades (0°C ~ 70°C), providing design flexibility for specific thermal requirements.

Manufacturer Recommended Alternatives are functionally compatible RS232 2/2 transceivers from Analog Devices Inc. that meet the same package, supply voltage, and compliance requirements. These parts may feature enhanced specifications such as higher data rates (230 kbps) or different receiver hysteresis values (400 mV or 650 mV).

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temperature	Package	RoHS Status
MAX232IDWRG4	Texas Instruments	Obsolete	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	ROHS3
MAX202IDWR	Texas Instruments	Active	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	ROHS3
MAX232IDWR	Texas Instruments	Active	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	ROHS3
TRS202EIDWR	Texas Instruments	Obsolete	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	ROHS3
TRS232IDWR	Texas Instruments	Discontinued at DiGi Electronics	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	ROHS3
MAX232EWE+	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	ROHS3
MAX232CWE+	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	ROHS3
MAX232MWE/PR+	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	-55°C ~ 125°C	16-SOIC	ROHS3
ADM202EARWZ	Analog Devices Inc.	Active	RS232	2/2	Full	650 mV	230 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	ROHS3
ADM202EARWZ-REEL	Analog Devices Inc.	Active	RS232	2/2	Full	650 mV	230 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	ROHS3
ADM202JRWZ	Analog Devices Inc.	Active	RS232	2/2	Full	400 mV	—	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	ROHS3

Engineering Selection Recommendations

For Direct Replacement (Active Product Status):

MAX232IDWR is the primary recommended substitute. This part maintains identical electrical specifications, operating temperature range, and package configuration while offering active product status and improved supply availability. Both parts are manufactured by Texas Instruments and carry ROHS3 compliance with MSL 1 rating.

MAX202IDWR provides an alternative parametric equivalent with active status. This part is functionally identical to the MAX232IDWRG4 and represents a viable substitution path for new designs or production continuity.

For Extended Temperature Applications:

MAX232MWE/PR+ extends the operating temperature range to -55°C ~ 125°C while maintaining all other critical specifications. This upgrade is suitable for applications requiring military or industrial temperature grades.

For Standard Commercial Temperature Range:

MAX232CWE+ operates across 0°C ~ 70°C and is appropriate for commercial-grade applications where the extended military temperature range is not required.

For Enhanced Performance:

ADM202EARWZ and ADM202EARWZ-REEL offer higher data rates (230 kbps) and increased receiver hysteresis (650 mV), providing enhanced noise immunity and faster serial communication. These parts are manufactured by Analog Devices Inc. and maintain full RS232 2/2 transceiver functionality with identical package and supply voltage specifications.

ADM202JRWZ provides a commercial-grade alternative (0°C ~ 70°C) with 400 mV receiver hysteresis and is suitable for cost-optimized designs where extended temperature performance is not required.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and 16-SOIC package compatibility, ensuring direct PCB-level interchangeability.

Frequently Asked Questions (FAQ)

Q: Can MAX232IDWR be used as a direct replacement for MAX232IDWRG4?

A: Yes. MAX232IDWR is a parametric equivalent with identical electrical specifications, operating temperature range (-40°C ~ 85°C), supply voltage (4.5V ~ 5.5V), and 16-SOIC package. The primary difference is product status: MAX232IDWR is active while MAX232IDWRG4 is obsolete.

Q: What is the difference between MAX232IDWR and MAX202IDWR?

A: Both parts are parametric equivalents with identical specifications. MAX202IDWR represents an alternative base product number from Texas Instruments. Selection between these parts depends on design documentation requirements and supplier availability.

Q: Can I use ADM202EARWZ in place of MAX232IDWRG4?

A: ADM202EARWZ is functionally compatible as a 2/2 full-duplex RS232 transceiver in 16-SOIC packaging with matching supply voltage and operating temperature range. However, it features enhanced specifications: 230 kbps data rate (vs. 120 kbps) and 650 mV receiver hysteresis (vs. 500 mV). These differences do not prevent substitution but represent performance enhancements suitable for applications requiring higher data rates or improved noise immunity.

Q: What is the difference between MAX232CWE+ and MAX232MWE/PR+?

A: Both parts share identical electrical specifications and package configuration. The primary difference is operating temperature range: MAX232CWE+ operates across 0°C ~ 70°C (commercial grade), while MAX232MWE/PR+ operates across -55°C ~ 125°C (extended/military grade). Selection depends on the thermal environment of the application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory specifications of the MAX232IDWRG4.

Q: What is the significance of receiver hysteresis in RS232 transceiver selection?

A: Receiver hysteresis determines the voltage differential required for the receiver to switch logic states, affecting noise immunity and signal integrity. The MAX232IDWRG4 specifies 500 mV hysteresis. Substitute parts with identical hysteresis (MAX232IDWR, MAX202IDWR, MAX232EWE+, MAX232CWE+, MAX232MWE/PR+) provide equivalent noise performance. Parts with different hysteresis values (ADM202EARWZ at 650 mV, ADM202JRWZ at 400 mV) offer alternative noise immunity characteristics suitable for specific application requirements.

Q: Can I mix packaging formats (Tube vs. Cut Tape & Digi-Reel) in production?

A: Yes. Packaging format differences (Tube, Cut Tape & Digi-Reel, Tape & Reel) do not affect electrical or mechanical compatibility. Selection depends on assembly process requirements and supplier logistics. All parts maintain identical 16-SOIC package dimensions and pinout.

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