MAX211ECAI RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX211ECAI is a full-duplex RS232 transceiver interface IC manufactured by Analog Devices Inc./Maxim Integrated, configured with 4 drivers and 5 receivers in a 28-SSOP surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part 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.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX211ECAI
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-SSOP (0.209", 5.30mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX211ECAI is determined by strict adherence to the following critical parameters:

Primary Substitution Criteria:

Protocol: RS232
Number of Drivers/Receivers: 4/5 configuration
Duplex: Full
Package / Case: 28-SSOP (0.209", 5.30mm Width)
Mounting Type: Surface Mount
Data Rate: 120 Kbps minimum
Voltage - Supply: 4.5V ~ 5.5V compatibility
Receiver Hysteresis: 500 mV (±150 mV tolerance acceptable)

Substitute parts are grouped into three categories based on their relationship to the main part:

Parametric Equivalents: Parts with identical electrical specifications and package configuration, differing only in product status (Active vs. Obsolete) or RoHS compliance level. These include MAX211CAI+, MAX211ECAI+, MAX213CAI+, MAX213ECAI+, MAX241CAI+, and MAX241ECAI+.

Upgrade Parts: Parts with extended operating temperature ranges (-40°C ~ 85°C vs. 0°C ~ 70°C) or alternative manufacturer sourcing, such as MAX211IDB and MAX211IDBR from Texas Instruments.

Manufacturer Recommended Alternatives: Parts with minor parameter variations, specifically ADM211ARSZ and ADM211ARSZ-REEL, which feature 650 mV receiver hysteresis and extended temperature operation, representing a functional upgrade path.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Package	Supply Voltage	Operating Temp	Receiver Hysteresis	Product Status	RoHS Status
MAX211ECAI	Analog Devices/Maxim	4/5	28-SSOP	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Obsolete	Non-compliant
MAX211CAI+	Analog Devices/Maxim	4/5	28-SSOP	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	ROHS3 Compliant
MAX211ECAI+	Analog Devices/Maxim	4/5	28-SSOP	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	ROHS3 Compliant
MAX213CAI+	Analog Devices/Maxim	4/5	28-SSOP	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	ROHS3 Compliant
MAX213ECAI+	Analog Devices/Maxim	4/5	28-SSOP	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	ROHS3 Compliant
MAX241CAI+	Analog Devices/Maxim	4/5	28-SSOP	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	ROHS3 Compliant
MAX241ECAI+	Analog Devices/Maxim	4/5	28-SSOP	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Active	ROHS3 Compliant
MAX211IDB	Texas Instruments	4/5	28-SSOP	4.5V ~ 5.5V	-40°C ~ 85°C	500 mV	Obsolete	ROHS3 Compliant
MAX211IDBR	Texas Instruments	4/5	28-SSOP	4.5V ~ 5.5V	-40°C ~ 85°C	500 mV	Active	ROHS3 Compliant
ADM211ARSZ	Analog Devices	4/5	28-SSOP	4.5V ~ 5.5V	-40°C ~ 85°C	650 mV	Active	ROHS3 Compliant
ADM211ARSZ-REEL	Analog Devices	4/5	28-SSOP	4.5V ~ 5.5V	-40°C ~ 85°C	650 mV	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select MAX211ECAI+, MAX211CAI+, MAX213ECAI+, MAX213CAI+, MAX241ECAI+, or MAX241CAI+ when maintaining the original operating temperature range (0°C ~ 70°C) and receiver hysteresis specification (500 mV) is required. These parts are Active status with ROHS3 compliance, providing improved procurement continuity over the obsolete MAX211ECAI.

For Extended Temperature Operation: MAX211IDB or MAX211IDBR provide -40°C ~ 85°C operating range with ROHS3 compliance. MAX211IDBR is preferred due to Active product status. These parts are suitable for applications requiring wider temperature performance than the original specification.

For Manufacturer-Recommended Upgrade: ADM211ARSZ or ADM211ARSZ-REEL offer enhanced receiver hysteresis (650 mV) and extended temperature operation (-40°C ~ 85°C) with Active status and ROHS3 compliance. These represent a functional upgrade path for new designs or redesigns where improved noise immunity is beneficial.

All substitute parts maintain identical 28-SSOP package geometry, full-duplex RS232 protocol operation, 4/5 driver/receiver configuration, and 120 Kbps data rate compatibility with the original MAX211ECAI specification.

Frequently Asked Questions (FAQ)

Q: Can MAX211ECAI be directly replaced with MAX211ECAI+? A: Yes. MAX211ECAI+ is a parametric equivalent with identical electrical specifications and package configuration. The primary difference is product status (Active vs. Obsolete) and RoHS compliance level (ROHS3 vs. non-compliant). Electrical performance and pinout are equivalent.

Q: What is the difference between MAX211 and MAX213 variants? A: Both maintain identical 4/5 driver/receiver configuration, RS232 protocol, 28-SSOP package, and electrical parameters (500 mV hysteresis, 120 Kbps data rate, 4.5V ~ 5.5V supply). The MAX213 series represents an alternative product line within the same functional class. Selection between them is based on availability and procurement preference.

Q: Why would I select ADM211ARSZ over MAX211ECAI+? A: ADM211ARSZ provides two functional enhancements: extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C) and increased receiver hysteresis (650 mV vs. 500 mV). The higher hysteresis improves noise immunity in electrically noisy environments. This part is suitable for applications requiring wider temperature performance or enhanced signal integrity.

Q: Are MAX211IDB and MAX211IDBR interchangeable? A: Both parts are sourced from Texas Instruments with identical electrical specifications and 28-SSOP packaging. MAX211IDBR is Active status with Cut Tape and Digi-Reel packaging, while MAX211IDB is Obsolete. For new procurement, MAX211IDBR is preferred. Both provide -40°C ~ 85°C operating range with ROHS3 compliance.

Q: What packaging options are available for substitute parts? A: Substitute parts are available in Tube packaging (MAX211CAI+, MAX211ECAI+, MAX213CAI+, MAX213ECAI+, MAX241CAI+, MAX241ECAI+, ADM211ARSZ) or Cut Tape & Digi-Reel packaging (MAX211IDBR). ADM211ARSZ-REEL is supplied on reel format. Packaging selection depends on assembly volume and handling requirements.

Q: Is the 28-SSOP package consistent across all substitutes? A: Yes. All substitute parts maintain the 28-SSOP (0.209", 5.30mm Width) package specification, ensuring PCB footprint and mechanical compatibility with designs originally specified for MAX211ECAI.

Q: Can I use these parts interchangeably in legacy designs? A: Parametric equivalents (MAX211CAI+, MAX211ECAI+, MAX213CAI+, MAX213ECAI+, MAX241CAI+, MAX241ECAI+) are direct functional replacements. Extended temperature variants (MAX211IDB, MAX211IDBR, ADM211ARSZ) are compatible but provide enhanced performance specifications. Verify application requirements for operating temperature and receiver hysteresis before selection.

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