MAX208CWG Equivalent & Substitute Parts

Part Overview

The MAX208CWG is a full-duplex RS232 transceiver with 4 drivers and 4 receivers in a 24-SOIC surface mount package, manufactured by Analog Devices Inc./Maxim Integrated. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The MAX208CWG operates within a 4.5V to 5.5V supply range with a 120 kbps data rate and 500 mV receiver hysteresis, suitable for legacy RS232 communication applications requiring full-duplex operation.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX208CWG
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	4/4
Duplex	Full
Data Rate	120 kbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	24-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	500 mV
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MAX208CWG is determined by the following critical parameters:

Driver/Receiver Configuration: 4/4 full-duplex operation
Protocol Compliance: RS232 standard
Package Type: 24-SOIC form factor
Supply Voltage Range: 4.5V ~ 5.5V
Data Rate: 120 kbps minimum
Receiver Hysteresis: 500 mV or higher
Mounting Type: Surface mount

Substitute parts are grouped into two categories:

Parametric Equivalents (MAX208CWG+, MAX208ECWG+, MAX238CWG+, MAX238ECWG+): These parts maintain identical 4/4 driver/receiver configuration, identical package, and identical electrical specifications. These are direct functional replacements with active product status and RoHS3 compliance.

Direct Alternatives (ADM208ARZ, ADM208ARZ-REEL, ADM208EARZ, ADM238LJRZ): These parts from Analog Devices maintain the 4/4 configuration and 24-SOIC package with extended operating temperature ranges (-40°C ~ 85°C) and higher receiver hysteresis (650 mV), providing enhanced performance margins.

Configuration Variants (MAX206CWG+, MAX206ECWG+, MAX236CWG+): These parts feature 4/3 driver/receiver configuration instead of 4/4, suitable only for applications where the reduced driver count is acceptable.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Product Status	RoHS Status
MAX208CWG	Analog Devices/Maxim	4/4	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Obsolete	Non-compliant
MAX208CWG+	Analog Devices/Maxim	4/4	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	RoHS3 Compliant
MAX208ECWG+	Analog Devices/Maxim	4/4	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	RoHS3 Compliant
MAX238CWG+	Analog Devices/Maxim	4/4	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	RoHS3 Compliant
MAX236CWG+	Analog Devices/Maxim	4/3	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	RoHS3 Compliant
ADM208ARZ	Analog Devices	4/4	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	650 mV	Active	RoHS3 Compliant
ADM208ARZ-REEL	Analog Devices	4/4	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	650 mV	Active	RoHS3 Compliant
ADM208EARZ	Analog Devices	4/4	230 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	650 mV	Active	RoHS3 Compliant
ADM238LJRZ	Analog Devices	4/4	120 kbps	4.75V ~ 5.25V	0°C ~ 70°C	650 mV	Active	RoHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select MAX208CWG+, MAX208ECWG+, MAX238CWG+, or MAX238ECWG+ when the original MAX208CWG specifications must be maintained exactly. These parts are active products with RoHS3 compliance, ensuring long-term availability and regulatory compliance for new designs.

For Enhanced Performance: Select ADM208ARZ, ADM208ARZ-REEL, or ADM208EARZ when extended operating temperature range (-40°C ~ 85°C) and higher receiver hysteresis (650 mV) are beneficial. ADM208EARZ additionally supports 230 kbps data rate. These parts maintain full 4/4 driver/receiver configuration and 24-SOIC packaging.

For Reduced Driver Count Applications: Select MAX206CWG+, MAX206ECWG+, or MAX236CWG+ only when the application requires fewer drivers (4/3 configuration). These parts are suitable for asymmetrical communication requirements where full 4/4 capability is not needed.

For Voltage-Constrained Systems: Select ADM238LJRZ when the supply voltage range is restricted to 4.75V ~ 5.25V. This part maintains 4/4 configuration and 24-SOIC packaging with RoHS3 compliance.

All recommended substitutes are active products with RoHS3 compliance, ensuring regulatory alignment and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can MAX208CWG+ be used as a direct replacement for MAX208CWG? A: Yes. MAX208CWG+ maintains identical electrical specifications, driver/receiver configuration (4/4), package type (24-SOIC), and operating parameters. The primary difference is product status (active vs. obsolete) and RoHS3 compliance.

Q: What is the difference between MAX208CWG+ and MAX238CWG+? A: Both parts share identical electrical specifications and 4/4 driver/receiver configuration in 24-SOIC packaging. The difference lies in the base product series designation (MAX208 vs. MAX238). Both are functionally equivalent for RS232 full-duplex communication.

Q: Can ADM208ARZ replace MAX208CWG in all applications? A: ADM208ARZ is functionally compatible with identical 4/4 configuration and 24-SOIC package. However, it features extended operating temperature (-40°C ~ 85°C vs. 0°C ~ 70°C) and higher receiver hysteresis (650 mV vs. 500 mV). These differences represent performance enhancements suitable for most applications, but system validation is necessary for temperature-critical designs.

Q: Why would I select a 4/3 configuration part like MAX206CWG+ instead of a 4/4 part? A: The 4/3 configuration (4 drivers, 3 receivers) is selected only when the application requires asymmetrical communication with fewer receiver channels. If full 4/4 capability is needed, 4/4 parts must be used.

Q: Is ADM208EARZ compatible with MAX208CWG? A: ADM208EARZ is pin-compatible and maintains 4/4 driver/receiver configuration in 24-SOIC packaging. It provides enhanced performance with extended temperature range (-40°C ~ 85°C) and higher data rate capability (230 kbps vs. 120 kbps). It is suitable as a replacement when these performance enhancements are acceptable.

Q: What does RoHS3 compliance mean for part selection? A: RoHS3 compliance indicates the part meets current environmental and hazardous substance restrictions. The original MAX208CWG is RoHS non-compliant. All active substitute parts listed are RoHS3 compliant, making them suitable for new designs and systems requiring regulatory compliance.

Q: Are all substitute parts available in 24-SOIC packaging? A: Yes. All substitute parts listed maintain the 24-SOIC (0.295", 7.50mm Width) surface mount package, ensuring PCB layout compatibility with the original MAX208CWG.

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