MAX208ECAG Equivalent & Substitute Parts

Part Overview

The MAX208ECAG is a 4/4 full-duplex RS232 transceiver in 24-SSOP surface mount packaging manufactured by Analog Devices Inc./Maxim Integrated. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing system support and new designs. The MAX208ECAG operates across the industrial temperature range (-40°C to 85°C) with a 4.5V to 5.5V supply voltage, making it suitable for legacy communication interface applications requiring RS232 protocol compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX208ECAG
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	4/4
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	120 Kbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	24-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 MAX208ECAG is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

Protocol: RS232
Package / Case: 24-SSOP (0.209", 5.30mm Width)
Mounting Type: Surface Mount
Voltage - Supply: 4.5V ~ 5.5V
Number of Drivers/Receivers: 4/4 (for direct equivalents)
Duplex: Full
Receiver Hysteresis: 500 mV
Data Rate: 120 Kbps minimum

Substitute parts are categorized as follows:

Parametric Equivalents: Parts matching all critical electrical parameters with identical package specifications. These include MAX208ECAG+, MAX208EEAG+, and MAX206EEAG+ (with 4/3 driver/receiver configuration).

Direct Equivalents: Parts from alternative manufacturers (Texas Instruments, Analog Devices) with matching 4/4 driver/receiver configuration, identical electrical specifications, and 24-SSOP packaging. These include MAX208CDB, MAX208CDBR, TRS208CDB, and TRS208CDBR.

Upgrade Options: Parts with enhanced specifications or improved product status (Active vs. Obsolete) that maintain backward compatibility. These include MAX208IDBR and TRS208IDBR, which support the extended industrial temperature range (-40°C to 85°C).

Cross-Manufacturer Alternatives: Parts from Analog Devices (ADM208EARS) with enhanced data rate capability (230 kbps vs. 120 kbps) and higher receiver hysteresis (650 mV vs. 500 mV).

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	RoHS Status
MAX208ECAG	Analog Devices/Maxim	4/4	120 Kbps	500 mV	-40°C ~ 85°C	Obsolete	Non-compliant
MAX208ECAG+	Analog Devices/Maxim	4/4	120 Kbps	500 mV	-40°C ~ 85°C	Active	ROHS3 Compliant
MAX208EEAG+	Analog Devices/Maxim	4/4	120 Kbps	500 mV	-40°C ~ 85°C	Active	ROHS3 Compliant
MAX206EEAG+	Analog Devices/Maxim	4/3	120 Kbps	500 mV	-40°C ~ 85°C	Active	ROHS3 Compliant
ADM208EARS	Analog Devices	4/4	230 kbps	650 mV	-40°C ~ 85°C	Obsolete	ROHS3 Compliant
MAX208CDB	Texas Instruments	4/4	120 Kbps	500 mV	0°C ~ 70°C	Obsolete	ROHS3 Compliant
MAX208CDBR	Texas Instruments	4/4	120 Kbps	500 mV	0°C ~ 70°C	Obsolete	ROHS3 Compliant
TRS208CDB	Texas Instruments	4/4	120 Kbps	500 mV	0°C ~ 70°C	Obsolete	ROHS3 Compliant
TRS208CDBR	Texas Instruments	4/4	120 Kbps	500 mV	0°C ~ 70°C	Obsolete	ROHS3 Compliant
MAX208IDBR	Texas Instruments	4/4	120 Kbps	500 mV	-40°C ~ 85°C	Obsolete	ROHS3 Compliant
TRS208IDBR	Texas Instruments	4/4	120 Kbps	500 mV	-40°C ~ 85°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For RoHS3 Compliance Requirement: Select MAX208ECAG+, MAX208EEAG+, or TRS208IDBR. These parts maintain electrical and mechanical compatibility with the original MAX208ECAG while meeting ROHS3 compliance standards. MAX208ECAG+ and MAX208EEAG+ are preferred for applications requiring the extended industrial temperature range (-40°C to 85°C).

For Active Product Status: MAX208ECAG+, MAX208EEAG+, MAX206EEAG+, and TRS208IDBR are currently in active production. TRS208IDBR offers the advantage of active status combined with extended temperature range support and ROHS3 compliance.

For Industrial Temperature Range (-40°C to 85°C): Parts suitable for full industrial temperature operation include MAX208ECAG+, MAX208EEAG+, MAX206EEAG+, ADM208EARS, MAX208IDBR, and TRS208IDBR. The MAX208ECAG+, MAX208EEAG+, and TRS208IDBR are recommended as they combine active product status with full compliance certifications.

For Commercial Temperature Range (0°C to 70°C): MAX208CDB, MAX208CDBR, TRS208CDB, and TRS208CDBR are suitable for applications with reduced temperature requirements. These parts are obsolete but remain available in inventory.

For Enhanced Data Rate Capability: ADM208EARS supports 230 kbps data rate with 650 mV receiver hysteresis, providing improved noise margin compared to the standard 120 kbps specification. This part is suitable for applications requiring higher communication speeds while maintaining RS232 protocol compliance.

Frequently Asked Questions (FAQ)

Q: Can MAX206EEAG+ replace MAX208ECAG directly? A: MAX206EEAG+ has a 4/3 driver/receiver configuration compared to the 4/4 configuration of MAX208ECAG. This part is suitable only if the application requires fewer receiver channels. All other electrical parameters and package specifications are identical.

Q: What is the difference between MAX208ECAG+ and MAX208EEAG+? A: Both parts are parametric equivalents with identical electrical specifications, operating temperature range, and package type. The primary difference is product status and RoHS compliance certification. Both are suitable direct replacements for MAX208ECAG.

Q: Are Texas Instruments MAX208CDB and TRS208CDB interchangeable? A: Yes, MAX208CDB and TRS208CDB are electrically and mechanically identical. Both are 4/4 RS232 transceivers in 24-SSOP packaging with identical electrical specifications. The difference is in manufacturer designation only.

Q: Why do some substitutes have a reduced operating temperature range (0°C to 70°C)? A: MAX208CDB, MAX208CDBR, TRS208CDB, and TRS208CDBR are specified for commercial temperature range only. Applications requiring extended industrial temperature operation (-40°C to 85°C) must use MAX208ECAG+, MAX208EEAG+, MAX206EEAG+, ADM208EARS, MAX208IDBR, or TRS208IDBR.

Q: Is ADM208EARS a suitable replacement for MAX208ECAG? A: ADM208EARS maintains the 4/4 driver/receiver configuration and 24-SSOP package but differs in receiver hysteresis (650 mV vs. 500 mV) and data rate capability (230 kbps vs. 120 kbps). It is suitable for applications where enhanced noise margin and higher data rates are beneficial.

Q: What packaging options are available for MAX208 RS232 transceivers? A: All listed substitutes are supplied in 24-SSOP surface mount packaging with identical physical dimensions (0.209", 5.30mm Width). Packaging variations include Tube, Cut Tape (CT) & Digi-Reel®, and standard surface mount configurations, but the component footprint remains constant.

Q: Which substitute offers the best combination of active status and compliance? A: TRS208IDBR combines active product status, ROHS3 compliance, extended industrial temperature range (-40°C to 85°C), and identical electrical specifications to MAX208ECAG. This part is the recommended choice for new designs requiring long-term availability and regulatory compliance.

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