MAX211CWI RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX211CWI is a full-duplex RS232 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated, configured with 4 drivers and 5 receivers in a 28-SOIC surface mount package. This part is classified as obsolete, with 1400 units available in new original stock. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute parts maintain electrical and mechanical compatibility while offering improved product lifecycle status and compliance certifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX211CWI
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	4/5
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	28-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the MAX211CWI are classified into two categories based on electrical parameter compatibility:

Parametric Equivalents (Full Compatibility): Parts maintaining identical electrical specifications including 4/5 driver/receiver configuration, 500 mV receiver hysteresis, 120 Kbps data rate, 4.5V–5.5V supply voltage, and 0°C–70°C operating temperature range. These parts are pin-compatible and functionally interchangeable. Parametric equivalents include MAX211CWI+, MAX211ECWI+, MAX213CWI+, MAX213ECWI+, MAX241CWI+, and MAX241ECWI+. All parametric equivalents carry active product status and ROHS3 compliance.

Direct Substitutes (Extended Operating Range): Parts with modified electrical specifications that maintain core RS232 transceiver functionality but differ in receiver hysteresis (650 mV), operating temperature range (-40°C to 85°C or 0°C to 70°C), and supply voltage tolerance. Direct substitutes include ADM211ARZ, ADM241LARZ, and ADM241LJRZ. These parts are suitable for applications requiring extended temperature operation or tighter supply voltage specifications.

Key Parameters Determining Substitution:

Driver/Receiver Configuration (4/5)
Receiver Hysteresis (500 mV for parametric equivalents; 650 mV for direct substitutes)
Data Rate (120 Kbps minimum)
Supply Voltage Range (4.5V–5.5V for parametric equivalents; 4.75V–5.25V for ADM241 variants)
Operating Temperature Range (0°C–70°C for parametric equivalents; -40°C–85°C for ADM211ARZ and ADM241LARZ)
Package / Case (28-SOIC)

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temperature	Product Status	RoHS Status
MAX211CWI	Analog Devices Inc./Maxim Integrated	4/5	500 mV	120 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	Obsolete	RoHS non-compliant
MAX211CWI+	Analog Devices Inc./Maxim Integrated	4/5	500 mV	120 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	Active	ROHS3 Compliant
MAX211ECWI+	Analog Devices Inc./Maxim Integrated	4/5	500 mV	120 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	Active	ROHS3 Compliant
MAX213CWI+	Analog Devices Inc./Maxim Integrated	4/5	500 mV	120 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	Active	ROHS3 Compliant
MAX213ECWI+	Analog Devices Inc./Maxim Integrated	4/5	500 mV	120 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	Active	ROHS3 Compliant
MAX214CWI+	Analog Devices Inc./Maxim Integrated	3/5	500 mV	116 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	Active	ROHS3 Compliant
MAX241CWI+	Analog Devices Inc./Maxim Integrated	4/5	500 mV	120 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	Active	ROHS3 Compliant
MAX241ECWI+	Analog Devices Inc./Maxim Integrated	4/5	500 mV	120 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	Active	ROHS3 Compliant
ADM211ARZ	Analog Devices Inc.	4/5	650 mV	120 Kbps	4.5V ~ 5.5V	-40°C ~ 85°C	Active	ROHS3 Compliant
ADM241LARZ	Analog Devices Inc.	4/5	650 mV	120 Kbps	4.75V ~ 5.25V	-40°C ~ 85°C	Active	ROHS3 Compliant
ADM241LJRZ	Analog Devices Inc.	4/5	650 mV	120 Kbps	4.75V ~ 5.25V	0°C ~ 70°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement in Existing Designs: Select MAX211CWI+, MAX211ECWI+, MAX241CWI+, or MAX241ECWI+ when maintaining identical electrical specifications and operating conditions (0°C–70°C, 4.5V–5.5V supply). These parts are parametric equivalents with active product status and ROHS3 compliance, eliminating the lifecycle risk associated with the obsolete MAX211CWI.

For Extended Temperature Applications: Select ADM211ARZ when operating temperature range must extend to -40°C to 85°C while maintaining 4.5V–5.5V supply voltage tolerance. This part carries active product status and ROHS3 compliance.

For Tighter Supply Voltage Tolerance with Extended Temperature: Select ADM241LARZ or ADM241LJRZ when supply voltage must be constrained to 4.75V–5.25V. ADM241LARZ supports -40°C to 85°C operating range; ADM241LJRZ supports 0°C to 70°C operating range. Both carry active product status and ROHS3 compliance.

For Applications Not Requiring Extended Temperature: MAX213CWI+ and MAX213ECWI+ provide equivalent functionality with active product status and ROHS3 compliance within the standard 0°C–70°C operating range.

Compliance Consideration: All recommended substitute parts carry ROHS3 compliance, addressing the RoHS non-compliance status of the obsolete MAX211CWI.

Frequently Asked Questions (FAQ)

Q: Can MAX211CWI+ be used as a direct replacement for MAX211CWI?

A: Yes. MAX211CWI+ maintains identical electrical specifications: 4/5 driver/receiver configuration, 500 mV receiver hysteresis, 120 Kbps data rate, 4.5V–5.5V supply voltage, 0°C–70°C operating temperature, and 28-SOIC package. The primary differences are active product status and ROHS3 compliance.

Q: What is the difference between MAX211ECWI+ and MAX211CWI+?

A: Both parts are parametric equivalents with identical electrical specifications and operating ranges. The difference lies in manufacturing date code and quality assurance documentation. Both are active products with ROHS3 compliance.

Q: Why would I select ADM211ARZ instead of MAX211CWI+?

A: ADM211ARZ extends the operating temperature range to -40°C to 85°C, compared to MAX211CWI+ at 0°C to 70°C. However, ADM211ARZ specifies 650 mV receiver hysteresis versus 500 mV for MAX211CWI+. Select ADM211ARZ only if extended temperature operation is required and the higher receiver hysteresis specification is acceptable for your application.

Q: Are ADM241LARZ and ADM241LJRZ interchangeable?

A: Both parts share identical electrical specifications except for operating temperature range. ADM241LARZ operates from -40°C to 85°C; ADM241LJRZ operates from 0°C to 70°C. Both specify 4.75V–5.25V supply voltage and 650 mV receiver hysteresis. Select based on required operating temperature range.

Q: What is the significance of the "+" suffix in part numbers like MAX211CWI+?

A: The "+" suffix indicates the part is in active production with current compliance certifications (ROHS3). Parts without the "+" suffix, such as the obsolete MAX211CWI, are no longer actively manufactured.

Q: Can MAX214CWI+ replace MAX211CWI?

A: No. MAX214CWI+ has a different driver/receiver configuration (3/5 versus 4/5) and a lower data rate specification (116 Kbps versus 120 Kbps). It is not a suitable replacement for applications requiring 4 drivers and 5 receivers.

Q: Are all substitute parts available in 28-SOIC packaging?

A: Yes. All substitute parts listed are available in 28-SOIC (0.295", 7.50mm Width) surface mount package, maintaining mechanical compatibility with the original MAX211CWI.

Q: What is the inventory status of substitute parts?

A: All substitute parts carry active product status with current inventory availability: MAX211CWI+ (1095 units), MAX211ECWI+ (2260 units), MAX213CWI+ (732 units), MAX213ECWI+ (906 units), MAX214CWI+ (2100 units), MAX241CWI+ (2200 units), MAX241ECWI+ (1736 units), ADM211ARZ (3200 units), ADM241LARZ (1052 units), and ADM241LJRZ (1147 units).

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