MAX211ECWI RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX211ECWI 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 component is classified as obsolete, with 1,613 units currently in stock. Due to its obsolete product status, identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and system maintenance. Active alternatives with identical or compatible electrical and mechanical specifications are available from the same manufacturer and qualified second sources.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX211ECWI
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

Substitution of the MAX211ECWI is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Protocol: RS232
Number of Drivers/Receivers: 4/5 configuration
Duplex: Full
Receiver Hysteresis: 500 mV
Data Rate: 120 Kbps minimum
Voltage Supply Range: 4.5V ~ 5.5V
Package / Case: 28-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount

Substitution Categories:

Parametric Equivalents (Active Status): Parts that maintain identical electrical specifications and package configuration. These include MAX211CWI+, MAX211ECWI+, MAX213CWI+, MAX213ECWI+, MAX241CWI+, and MAX241ECWI+. All are manufactured by Analog Devices Inc./Maxim Integrated and carry ROHS3 compliance, addressing the RoHS non-compliance limitation of the original part.

Upgrade Options (Extended Temperature Range): MAX211IDW and MAX211IDW-R provide identical electrical and package specifications with extended operating temperature range (-40°C ~ 85°C) and ROHS3 compliance. These are sourced from Texas Instruments and represent functional upgrades suitable for applications requiring broader temperature operation.

Manufacturer Recommended Alternative (Enhanced Hysteresis): ADM211ARZ, manufactured by Analog Devices Inc., maintains all core specifications with increased receiver hysteresis (650 mV) and extended operating temperature range (-40°C ~ 85°C). This part offers improved noise immunity while preserving full electrical compatibility.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate (Kbps)	Receiver Hysteresis (mV)	Operating Temp (°C)	Package	Product Status	RoHS Status
MAX211ECWI	Analog Devices/Maxim	4/5	120	500	0 ~ 70	28-SOIC	Obsolete	Non-compliant
MAX211CWI+	Analog Devices/Maxim	4/5	120	500	0 ~ 70	28-SOIC	Active	ROHS3
MAX211ECWI+	Analog Devices/Maxim	4/5	120	500	0 ~ 70	28-SOIC	Active	ROHS3
MAX213CWI+	Analog Devices/Maxim	4/5	120	500	0 ~ 70	28-SOIC	Active	ROHS3
MAX213ECWI+	Analog Devices/Maxim	4/5	120	500	0 ~ 70	28-SOIC	Active	ROHS3
MAX214CWI+	Analog Devices/Maxim	3/5	116	500	0 ~ 70	28-SOIC	Active	ROHS3
MAX241CWI+	Analog Devices/Maxim	4/5	120	500	0 ~ 70	28-SOIC	Active	ROHS3
MAX241ECWI+	Analog Devices/Maxim	4/5	120	500	0 ~ 70	28-SOIC	Active	ROHS3
MAX211IDW	Texas Instruments	4/5	120	500	-40 ~ 85	28-SOIC	Last Time Buy	ROHS3
MAX211IDWR	Texas Instruments	4/5	120	500	-40 ~ 85	28-SOIC	Active	ROHS3
ADM211ARZ	Analog Devices	4/5	120	650	-40 ~ 85	28-SOIC	Active	ROHS3

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select MAX211ECWI+, MAX211CWI+, MAX213ECWI+, MAX213CWI+, MAX241ECWI+, or MAX241CWI+ when maintaining the original operating temperature range (0°C ~ 70°C) and electrical specifications. All are active products with ROHS3 compliance, eliminating the RoHS non-compliance issue of the obsolete MAX211ECWI. These parts are manufactured by Analog Devices Inc./Maxim Integrated and provide immediate design continuity.

For Extended Temperature Operation: MAX211IDW or MAX211IDWR are suitable when applications require operation beyond the standard 0°C ~ 70°C range, extending to -40°C ~ 85°C. Both maintain identical electrical specifications and 28-SOIC packaging. MAX211IDWR is the preferred choice due to active product status, while MAX211IDW carries Last Time Buy designation.

For Enhanced Noise Immunity: ADM211ARZ provides increased receiver hysteresis (650 mV versus 500 mV) while maintaining all other electrical parameters and extended temperature range (-40°C ~ 85°C). This part is recommended for applications operating in electrically noisy environments or requiring improved signal integrity margins.

Compliance Consideration: All recommended substitutes carry ROHS3 compliance, addressing regulatory requirements that may not be met by the original obsolete MAX211ECWI part.

Note on MAX214CWI+: This part differs in driver/receiver configuration (3/5 instead of 4/5) and data rate (116 Kbps instead of 120 Kbps). It is not a direct substitute and should only be selected if the application can accommodate reduced driver count and lower data rate specifications.

Frequently Asked Questions (FAQ)

Q: Can MAX211ECWI+ be used as a direct replacement for MAX211ECWI?

A: Yes. MAX211ECWI+ maintains identical electrical specifications (4/5 drivers/receivers, 120 Kbps data rate, 500 mV receiver hysteresis, 4.5V ~ 5.5V supply, 0°C ~ 70°C operating range) and 28-SOIC package configuration. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant).

Q: What is the difference between MAX211ECWI+ and MAX241ECWI+?

A: Both parts share identical electrical specifications and package configuration. The difference lies in the base product series designation (MAX211 versus MAX241). Both are active products with ROHS3 compliance and can be used interchangeably in applications requiring 4/5 RS232 transceiver functionality.

Q: Why would I select ADM211ARZ over MAX211ECWI+?

A: ADM211ARZ provides two advantages: increased receiver hysteresis (650 mV versus 500 mV) for improved noise immunity, and extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C). Select this part if your application requires operation in noisy electrical environments or outside the standard temperature range.

Q: Is MAX214CWI+ compatible with MAX211ECWI?

A: No. MAX214CWI+ has a different driver/receiver configuration (3/5 instead of 4/5) and lower data rate (116 Kbps instead of 120 Kbps). It is not a direct substitute and should only be used if the application can accommodate these reduced specifications.

Q: What is the difference between MAX211IDW and MAX211IDWR?

A: Both parts are sourced from Texas Instruments and maintain identical electrical specifications and 28-SOIC packaging. MAX211IDWR is supplied in Tape & Reel format with active product status, while MAX211IDW is supplied in Tube format with Last Time Buy status. For new designs, MAX211IDWR is the preferred choice.

Q: Can I use parts from different manufacturers interchangeably?

A: Yes, provided all electrical and mechanical parameters match. MAX211IDW and MAX211IDWR (Texas Instruments) and ADM211ARZ (Analog Devices) are qualified alternatives to Analog Devices/Maxim Integrated parts. All maintain the 28-SOIC package and RS232 protocol specifications required for compatibility.

Q: Does the packaging format (Tube versus Tape & Reel) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly processes. Electrical and mechanical specifications remain identical regardless of whether the part is supplied in Tube or Tape & Reel format.

Q: Why is RoHS compliance important for substitution?

A: RoHS compliance is a regulatory requirement in many markets. The original MAX211ECWI is RoHS non-compliant, while all recommended substitutes carry ROHS3 compliance. This ensures compatibility with current manufacturing standards and regulatory requirements.

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