MAX232IDWRE4 Equivalent & Substitute Parts

Part Overview

The MAX232IDWRE4 is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This interface IC operates across a 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 MAX232IDWRE4 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 architecture.

Key Parameters

Parameter	MAX232IDWRE4
Manufacturer	Texas Instruments
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)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MAX232IDWRE4 is determined by strict equivalence across the following critical parameters:

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

Substitute parts are categorized as follows:

Parametric Equivalents maintain all critical electrical and mechanical parameters, differing only in product status or packaging format (Cut Tape vs. Tube).

Direct Manufacturer Equivalents are functionally identical parts from the same or related manufacturer families, with identical parameter specifications.

Upgrade Parts maintain core functionality but may have narrower operating temperature ranges (0°C ~ 70°C vs. -40°C ~ 85°C), suitable for applications not requiring extended temperature operation.

Manufacturer Recommended Alternatives offer enhanced performance specifications (higher data rates, improved receiver hysteresis) while maintaining full backward compatibility with the original pinout and package.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temp	Supply Voltage	Package	RoHS
MAX232IDWRE4	Texas Instruments	Obsolete	RS232	2/2	120 kbps	500 mV	-40°C ~ 85°C	4.5V ~ 5.5V	16-SOIC	ROHS3
MAX202IDWR	Texas Instruments	Active	RS232	2/2	120 kbps	500 mV	-40°C ~ 85°C	4.5V ~ 5.5V	16-SOIC	ROHS3
MAX232IDWR	Texas Instruments	Active	RS232	2/2	120 kbps	500 mV	-40°C ~ 85°C	4.5V ~ 5.5V	16-SOIC	ROHS3
TRS202EIDWR	Texas Instruments	Obsolete	RS232	2/2	120 kbps	500 mV	-40°C ~ 85°C	4.5V ~ 5.5V	16-SOIC	ROHS3
TRS232IDWR	Texas Instruments	Discontinued at DiGi Electronics	RS232	2/2	120 kbps	500 mV	-40°C ~ 85°C	4.5V ~ 5.5V	16-SOIC	ROHS3
MAX232EWE+	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	120 kbps	500 mV	-40°C ~ 85°C	4.5V ~ 5.5V	16-SOIC	ROHS3
MAX232CWE+	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	120 kbps	500 mV	0°C ~ 70°C	4.5V ~ 5.5V	16-SOIC	ROHS3
MAX232CWE+T	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	120 kbps	500 mV	0°C ~ 70°C	4.5V ~ 5.5V	16-SOIC	ROHS3
ADM202EARWZ	Analog Devices Inc.	Active	RS232	2/2	230 kbps	650 mV	-40°C ~ 85°C	4.5V ~ 5.5V	16-SOIC	ROHS3
ADM202EARWZ-REEL	Analog Devices Inc.	Active	RS232	2/2	230 kbps	650 mV	-40°C ~ 85°C	4.5V ~ 5.5V	16-SOIC	ROHS3
ADM202JRWZ	Analog Devices Inc.	Active	RS232	2/2	—	400 mV	0°C ~ 70°C	4.5V ~ 5.5V	16-SOIC	ROHS3

Engineering Selection Recommendations

For Direct Replacement (Identical Operating Conditions):

MAX232IDWR and MAX202IDWR are parametric equivalents with active product status, maintaining all electrical specifications and temperature range of the original MAX232IDWRE4. These parts are recommended for applications requiring full -40°C to 85°C operation and are currently in active production.

For Standard Commercial Temperature Applications:

MAX232CWE+ and MAX232CWE+T are suitable for applications operating within 0°C to 70°C. These parts are actively manufactured and widely available. The +T variant is supplied in Cut Tape & Digi-Reel format for automated assembly.

For Enhanced Performance Requirements:

ADM202EARWZ and ADM202EARWZ-REEL offer superior data rate capability (230 kbps vs. 120 kbps) and improved receiver hysteresis (650 mV vs. 500 mV) while maintaining the full -40°C to 85°C operating range. These parts are backward compatible and provide performance headroom for future design iterations.

For Constrained Temperature Ranges:

ADM202JRWZ operates within 0°C to 70°C with 400 mV receiver hysteresis, suitable for applications with reduced temperature requirements and enhanced noise immunity.

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and 16-SOIC package compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can MAX232CWE+ replace MAX232IDWRE4 in all applications?

A: MAX232CWE+ is functionally equivalent for applications operating within 0°C to 70°C. Applications requiring -40°C to 85°C operation must use MAX232IDWR, MAX202IDWR, or ADM202EARWZ instead.

Q: What is the difference between MAX232IDWR and MAX202IDWR?

A: Both parts are parametric equivalents with identical electrical specifications, data rate, receiver hysteresis, and operating temperature range. The primary difference is the base product number designation (MAX232 vs. MAX202). Both are suitable direct replacements.

Q: Are ADM202EARWZ and ADM202EARWZ-REEL functionally identical?

A: Yes. Both parts are electrically identical. The difference is packaging format: ADM202EARWZ is supplied in Tube packaging, while ADM202EARWZ-REEL is supplied in Tape & Reel format for high-volume automated assembly.

Q: Can I use ADM202EARWZ in place of MAX232IDWRE4?

A: Yes. ADM202EARWZ maintains full backward compatibility with identical pinout, package, supply voltage range, and operating temperature. The enhanced data rate (230 kbps vs. 120 kbps) and improved receiver hysteresis (650 mV vs. 500 mV) provide additional performance margin without affecting existing circuit operation.

Q: Why is the MAX232IDWRE4 listed as obsolete?

A: The MAX232IDWRE4 has reached end-of-life status. Active alternatives such as MAX232IDWR, MAX202IDWR, and ADM202EARWZ provide equivalent or superior functionality and are currently in production.

Q: Does package format affect electrical performance?

A: No. Cut Tape (CT) & Digi-Reel, Tube, and Tape & Reel formats contain identical die and electrical specifications. Format selection is determined by assembly process requirements and volume considerations.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original MAX232IDWRE4 specifications.

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