MAX232DWG4 Equivalent & Substitute Parts

Part Overview

The MAX232DWG4 is a 2/2 full-duplex RS232 transceiver IC in 16-SOIC surface mount packaging manufactured by Texas Instruments. This component interfaces between RS232 serial communication lines and TTL/CMOS logic levels, operating at data rates up to 120 kbps with a supply voltage range of 4.5V to 5.5V. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs, production continuity, and long-term system support.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX232DWG4
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	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MAX232DWG4 is determined by strict electrical and mechanical compatibility across the following critical parameters:

Primary Substitution Criteria:

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

Secondary Compatibility Parameters:

Receiver Hysteresis: 500 mV (direct equivalents) or within acceptable tolerance
Data Rate: 120 kbps minimum
Operating Temperature: Must support at least 0°C ~ 70°C range

Substitute parts are grouped into three categories based on product status and operational characteristics:

Direct Equivalents (Active Status): Parts with identical electrical specifications and active product status, suitable for direct replacement in new designs.

Functional Equivalents (Enhanced Specifications): Parts with extended operating temperature ranges (-40°C ~ 85°C) or higher data rates (230 kbps), maintaining full backward compatibility while offering improved performance margins.

Alternate Manufacturers: Parts from different manufacturers (Renesas Electronics, Analog Devices) meeting identical functional specifications and package requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Drivers/Receivers	Data Rate	Operating Temp	Receiver Hysteresis	Supply Voltage	Package	MSL
MAX232DWG4	Texas Instruments	Obsolete	2/2	120 kbps	0°C ~ 70°C	500 mV	4.5V ~ 5.5V	16-SOIC	1
MAX232IDWR	Texas Instruments	Active	2/2	120 kbps	-40°C ~ 85°C	500 mV	4.5V ~ 5.5V	16-SOIC	1
MAX232EWE+	Analog Devices Inc./Maxim Integrated	Active	2/2	120 kbps	-40°C ~ 85°C	500 mV	4.5V ~ 5.5V	16-SOIC	1
MAX232EWE+T	Analog Devices Inc./Maxim Integrated	Active	2/2	120 kbps	-40°C ~ 85°C	500 mV	4.5V ~ 5.5V	16-SOIC	1
MAX232DW	Texas Instruments	Obsolete	2/2	120 kbps	0°C ~ 70°C	500 mV	4.5V ~ 5.5V	16-SOIC	1
HIN232CBZ-T	Renesas Electronics Corporation	Active	2/2	120 kbps	0°C ~ 70°C	500 mV	4.5V ~ 5.5V	16-SOIC	2
HIN232IBZ	Renesas Electronics Corporation	Active	2/2	120 kbps	-40°C ~ 85°C	500 mV	4.5V ~ 5.5V	16-SOIC	2
HIN232IBZ-T	Renesas Electronics Corporation	Active	2/2	120 kbps	-40°C ~ 85°C	500 mV	4.5V ~ 5.5V	16-SOIC	2
ADM202EARWZ	Analog Devices Inc.	Active	2/2	230 kbps	-40°C ~ 85°C	650 mV	4.5V ~ 5.5V	16-SOIC	1
ADM202EARWZ-REEL	Analog Devices Inc.	Active	2/2	230 kbps	-40°C ~ 85°C	650 mV	4.5V ~ 5.5V	16-SOIC	1
ADM202JRWZ	Analog Devices Inc.	Active	2/2	—	0°C ~ 70°C	400 mV	4.5V ~ 5.5V	16-SOIC	1

Engineering Selection Recommendations

For Direct Replacement in Existing Designs:

MAX232IDWR and MAX232EWE+T are the primary recommended substitutes. Both maintain identical electrical specifications to the MAX232DWG4 while offering active product status and extended operating temperature ranges (-40°C ~ 85°C). These parts ensure long-term availability and supply chain continuity. MAX232IDWR is supplied in Cut Tape & Digi-Reel packaging, while MAX232EWE+T is available in Cut Tape & Digi-Reel format with higher inventory levels (16,307 units).

For Temperature-Extended Applications:

HIN232IBZ and HIN232IBZ-T from Renesas Electronics provide active status with extended temperature operation (-40°C ~ 85°C) while maintaining identical electrical specifications. These parts are suitable for applications requiring wider operating temperature margins. HIN232IBZ-T offers Tape & Reel packaging with substantial inventory (5,772 units).

For Enhanced Performance Requirements:

ADM202EARWZ and ADM202EARWZ-REEL from Analog Devices offer doubled data rate capability (230 kbps) with extended temperature operation (-40°C ~ 85°C). These parts are suitable for applications requiring higher communication speeds while maintaining full RS232 2/2 transceiver functionality. Selection between tube and reel packaging depends on production volume requirements.

For Temperature-Matched Equivalents:

HIN232CBZ-T from Renesas Electronics matches the original operating temperature range (0°C ~ 70°C) with active product status, providing a direct functional equivalent with alternative manufacturer sourcing.

All recommended substitutes maintain ROHS3 compliance and identical 16-SOIC packaging, ensuring mechanical and electrical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can MAX232IDWR be used as a direct replacement for MAX232DWG4?

A: Yes. MAX232IDWR maintains identical electrical specifications including 2/2 drivers/receivers, 120 kbps data rate, 500 mV receiver hysteresis, and 4.5V ~ 5.5V supply voltage. The extended operating temperature range (-40°C ~ 85°C) provides additional margin beyond the original 0°C ~ 70°C specification. Both use 16-SOIC packaging with identical pinout and functionality.

Q: What is the difference between MAX232EWE+ and MAX232EWE+T?

A: Both parts are electrically identical with identical specifications. The difference is packaging format: MAX232EWE+ is supplied in Tube packaging, while MAX232EWE+T is supplied in Cut Tape & Digi-Reel format. Selection depends on production volume and handling requirements. MAX232EWE+T has significantly higher inventory availability (16,307 units vs. 1,260 units).

Q: Are Renesas HIN232 parts fully compatible with the MAX232DWG4?

A: Yes, for applications operating within 0°C ~ 70°C. HIN232CBZ-T matches the original temperature range exactly. HIN232IBZ and HIN232IBZ-T extend the temperature range to -40°C ~ 85°C. All three maintain identical electrical specifications and 16-SOIC packaging. The only difference is Moisture Sensitivity Level (MSL 2 vs. MSL 1), which affects storage and handling requirements.

Q: Why do ADM202 parts have different receiver hysteresis values?

A: ADM202EARWZ and ADM202EARWZ-REEL specify 650 mV hysteresis compared to the original 500 mV, while ADM202JRWZ specifies 400 mV. These variations remain within acceptable RS232 transceiver tolerances and do not affect functional compatibility. ADM202 parts offer enhanced data rate capability (230 kbps) suitable for applications requiring higher communication speeds.

Q: What packaging options are available for substitutes?

A: Substitutes are available in three packaging formats: Tube (standard packaging for lower volumes), Cut Tape & Digi-Reel (for moderate production volumes), and Tape & Reel (for high-volume manufacturing). All maintain identical 16-SOIC physical dimensions and pinout. Selection depends on production volume, handling equipment, and supply chain requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original MAX232DWG4 specification. This ensures compatibility with environmental regulations and procurement requirements across all markets.

Q: What is the significance of product status (Active vs. Obsolete)?

A: Active status indicates ongoing manufacturer support, continued production, and long-term availability. Obsolete status indicates end-of-life with no new production. For the MAX232DWG4 (obsolete), selecting active substitute parts ensures supply chain continuity and eliminates future availability risk.

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