MAX241CWI+ Equivalent & Substitute Parts

Part Overview

The MAX241CWI+ is a full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, configured with 4 drivers and 5 receivers in a 28-SOIC surface mount package. This interface IC operates across the 4.5V to 5.5V supply range and supports data rates up to 120 Kbps with a 500 mV receiver hysteresis specification. The part maintains Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical parameters, mechanical compatibility, and functional equivalence within the RS232 transceiver category.

Key Parameters

Parameter	MAX241CWI+ Specification
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
Package / Case	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MAX241CWI+ are classified into two categories based on electrical and mechanical parameter alignment:

Parametric Equivalents maintain identical electrical specifications across protocol, driver/receiver configuration, data rate, supply voltage, receiver hysteresis, package type, and thermal rating. These parts are direct functional replacements within the same operating envelope:

MAX211CWI+, MAX211ECWI+
MAX213CWI+, MAX213ECWI+
MAX241ECWI+

Partial Parameter Variants share the same package, protocol, and core transceiver function but differ in specific electrical parameters:

MAX214CWI+ operates with 3 drivers and 5 receivers (versus 4/5 configuration) and 116 Kbps data rate (versus 120 Kbps)

Manufacturer Recommended Alternatives are produced by Analog Devices Inc. and provide extended operating temperature ranges (-40°C to 85°C) and modified supply voltage specifications:

ADM211ARZ, ADM211EARZ (extended temperature, 650 mV receiver hysteresis)
ADM241LARZ (extended temperature, 650 mV receiver hysteresis, 4.75V ~ 5.25V supply)

Substitution eligibility is determined by matching the following critical parameters: RS232 protocol compliance, 28-SOIC package footprint, surface mount configuration, and ROHS3/MSL 1 compliance status.

Parameter Comparison

Part Number	Drivers/Receivers	Data Rate (Kbps)	Receiver Hysteresis (mV)	Supply Voltage	Operating Temperature	Inventory (Pcs)
MAX241CWI+	4/5	120	500	4.5V ~ 5.5V	0°C ~ 70°C	2200
MAX211CWI+	4/5	120	500	4.5V ~ 5.5V	0°C ~ 70°C	1095
MAX211ECWI+	4/5	120	500	4.5V ~ 5.5V	0°C ~ 70°C	2260
MAX213CWI+	4/5	120	500	4.5V ~ 5.5V	0°C ~ 70°C	732
MAX213ECWI+	4/5	120	500	4.5V ~ 5.5V	0°C ~ 70°C	906
MAX214CWI+	3/5	116	500	4.5V ~ 5.5V	0°C ~ 70°C	2100
MAX241ECWI+	4/5	120	500	4.5V ~ 5.5V	0°C ~ 70°C	1736
ADM211ARZ	4/5	120	650	4.5V ~ 5.5V	-40°C ~ 85°C	3200
ADM211EARZ	4/5	120	650	4.5V ~ 5.5V	-40°C ~ 85°C	1618
ADM241LARZ	4/5	120	650	4.75V ~ 5.25V	-40°C ~ 85°C	1052

Engineering Selection Recommendations

Direct Substitutes (Parametric Equivalents): MAX211CWI+, MAX211ECWI+, MAX213CWI+, MAX213ECWI+, and MAX241ECWI+ are functionally equivalent to MAX241CWI+ across all specified electrical and mechanical parameters. All maintain ROHS3 compliance, MSL 1 rating, and Active product status. These parts are suitable for direct board-level replacement without design modification.

Conditional Substitutes: MAX214CWI+ operates with reduced driver count (3 versus 4) and marginally lower data rate (116 Kbps versus 120 Kbps). Selection requires confirmation that the application circuit does not depend on the fourth driver channel or the additional 4 Kbps bandwidth margin.

Extended Temperature Alternatives: ADM211ARZ, ADM211EARZ, and ADM241LARZ extend the operating temperature range to -40°C to 85°C and increase receiver hysteresis to 650 mV. ADM241LARZ additionally narrows the supply voltage window to 4.75V ~ 5.25V. These parts are appropriate for applications requiring enhanced thermal performance or stricter input threshold specifications. All maintain ROHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can MAX211CWI+ replace MAX241CWI+ in existing designs? A: Yes. MAX211CWI+ matches all critical electrical parameters: 4/5 driver/receiver configuration, 120 Kbps data rate, 500 mV receiver hysteresis, 4.5V ~ 5.5V supply range, 0°C ~ 70°C operating temperature, and 28-SOIC package. Both are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between MAX241CWI+ and ADM241LARZ? A: ADM241LARZ extends the operating temperature range from 0°C ~ 70°C to -40°C ~ 85°C, increases receiver hysteresis from 500 mV to 650 mV, and narrows the supply voltage specification from 4.5V ~ 5.5V to 4.75V ~ 5.25V. The 28-SOIC package and 4/5 driver/receiver configuration remain identical. Selection depends on whether the application requires extended thermal operation and tighter input threshold margins.

Q: Is MAX214CWI+ a suitable substitute for MAX241CWI+? A: MAX214CWI+ is a partial substitute. It maintains the same package, protocol, supply voltage, and operating temperature range but operates with 3 drivers and 5 receivers (versus 4/5) and supports 116 Kbps data rate (versus 120 Kbps). Substitution is valid only if the circuit design does not require four independent driver channels and can operate within the lower data rate specification.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts—MAX211CWI+, MAX211ECWI+, MAX213CWI+, MAX213ECWI+, MAX241ECWI+, ADM211ARZ, ADM211EARZ, and ADM241LARZ—are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the significance of receiver hysteresis in RS232 transceiver selection? A: Receiver hysteresis determines the input threshold window for logic state transitions. MAX241CWI+ and its parametric equivalents specify 500 mV hysteresis, while ADM-series alternatives specify 650 mV. Higher hysteresis provides improved noise immunity in electrically noisy environments but may reduce sensitivity to marginal input signals. Selection should align with the application's signal integrity requirements.

Q: Can ADM211ARZ and ADM211EARZ be used interchangeably? A: Yes. Both parts are functionally identical, differing only in manufacturing date code designation (indicated by the "E" suffix in ADM211EARZ). Both maintain 4/5 driver/receiver configuration, 120 Kbps data rate, 650 mV receiver hysteresis, -40°C ~ 85°C operating temperature, and 28-SOIC package.

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