MAX3226ECAE RS232 Transceiver Interface IC Equivalent & Substitute Parts

Part Overview

The MAX3226ECAE is a full-duplex RS232 transceiver interface IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-SSOP surface mount package. This component is classified as obsolete, with 2200 units currently in stock. The part operates across a 3V to 5.5V supply range and supports data rates up to 250 kbps with 500 mV receiver hysteresis. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity, long-term availability, and compliance with current manufacturing standards.

Key Parameters

Parameter	Specification
Manufacturer Part Number	MAX3226ECAE
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Interface
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	1/1
Duplex	Full
Data Rate	250 kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Receiver Hysteresis	500 mV
Mounting Type	Surface Mount
Package / Case	16-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 eligibility for the MAX3226ECAE is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Number of Drivers/Receivers: 1/1
Duplex: Full
Receiver Hysteresis: 500 mV
Voltage - Supply: 3V ~ 5.5V
Mounting Type: Surface Mount
Package / Case: 16-SSOP or 16-TSSOP (0.209" or 0.173" width)
Data Rate: Minimum 250 kbps

Substitute parts are grouped into two categories:

Parametric Equivalents (Analog Devices Inc./Maxim Integrated): Parts that maintain identical electrical specifications and package footprint while offering improved product status (Active vs. Obsolete) and enhanced RoHS compliance.

Manufacturer Recommended Alternatives (Renesas Electronics, Intersil, Texas Instruments): Parts that meet all critical electrical parameters and package requirements, sourced from alternative manufacturers with active product status and current compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status	Inventory
MAX3226ECAE	Analog Devices	RS232	1/1	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Obsolete	Non-compliant	2200 Pcs
MAX3221ECAE+	Analog Devices	RS232	1/1	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant	2100 Pcs
MAX3226CAE+	Analog Devices	RS232	1/1	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant	1389 Pcs
MAX3226ECAE+	Analog Devices	RS232	1/1	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant	3414 Pcs
ICL3226EIAZ	Renesas Electronics	RS232	1/1	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant	2400 Pcs
ICL3226EIAZ-T	Renesas Electronics	RS232	1/1	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant	897 Pcs
ICL3226IAZ	Intersil	RS232	1/1	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	Not specified	4278 Pcs
ICL3226IAZ-T	Renesas Electronics	RS232	1/1	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant	834 Pcs
SN65C3221EDB	Texas Instruments	RS232	1/1	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Last Time Buy	ROHS3 Compliant	1038 Pcs
SN65C3221EDBR	Texas Instruments	RS232	1/1	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant	3826 Pcs
SN65C3221EPWR	Texas Instruments	RS232	1/1	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active	ROHS3 Compliant	3300 Pcs

Engineering Selection Recommendations

Primary Recommendation - Analog Devices Parametric Equivalents:

MAX3226ECAE+ and MAX3221ECAE+ are direct parametric equivalents from the original manufacturer. Both parts maintain identical electrical specifications, package footprint, and operating characteristics while offering Active product status and ROHS3 compliance. MAX3226ECAE+ provides the highest inventory availability (3414 units) and is the closest functional match to the obsolete MAX3226ECAE.

Secondary Recommendation - Extended Temperature Range Alternatives:

ICL3226EIAZ and ICL3226EIAZ-T (Renesas Electronics) and ICL3226IAZ (Intersil) provide extended operating temperature range (-40°C to 85°C versus 0°C to 70°C), ROHS3 compliance, and Active product status. These parts are suitable for applications requiring broader thermal operating conditions. ICL3226IAZ offers the highest inventory (4278 units).

Tertiary Recommendation - Higher Data Rate Alternatives:

SN65C3221EDBR and SN65C3221EDB (Texas Instruments) support 1 Mbps data rates, exceeding the 250 kbps specification of the original part. Both maintain identical supply voltage, duplex configuration, and package footprint. SN65C3221EDBR is Active with 3826 units in stock. SN65C3221EPWR uses a 16-TSSOP package (0.173" width) instead of 16-SSOP, requiring PCB layout verification before selection.

Compliance Consideration:

The original MAX3226ECAE is RoHS non-compliant. All recommended substitutes are ROHS3 compliant or unaffected by REACH regulations, supporting modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can MAX3221ECAE+ directly replace MAX3226ECAE in existing designs?

A: Yes. MAX3221ECAE+ is a parametric equivalent with identical electrical specifications (RS232 protocol, 1/1 drivers/receivers, 250 kbps data rate, 3V-5.5V supply, 500 mV hysteresis) and matching 16-SSOP package footprint. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No design modifications are required.

Q: What is the difference between MAX3226ECAE+ and MAX3226CAE+?

A: Both are Analog Devices parametric equivalents with identical electrical specifications and 16-SSOP packaging. The primary distinction is the temperature grade designation within the part number. Both are Active products with ROHS3 compliance. Selection between these parts depends on availability and supplier preference.

Q: Why do Renesas ICL3226 parts have an extended operating temperature range?

A: The ICL3226 series is specified for -40°C to 85°C operation, compared to the original MAX3226ECAE range of 0°C to 70°C. This extended range is a design characteristic of the Renesas product line and does not affect substitution eligibility, as the original operating range is fully contained within the extended range.

Q: Are Texas Instruments SN65C3221 parts suitable substitutes despite higher data rates?

A: Yes. SN65C3221 parts support 1 Mbps data rates, which exceeds the 250 kbps requirement of MAX3226ECAE. Higher data rate capability is backward compatible with lower-speed applications. All other critical parameters (RS232 protocol, 1/1 configuration, full duplex, 500 mV hysteresis, 3V-5.5V supply) match exactly. SN65C3221EDBR maintains the 16-SSOP package; SN65C3221EPWR uses 16-TSSOP and requires PCB footprint verification.

Q: What packaging options are available among substitute parts?

A: Most substitutes use 16-SSOP (0.209", 5.30mm width), matching the original MAX3226ECAE package. SN65C3221EPWR uses 16-TSSOP (0.173", 4.40mm width), which has a narrower footprint. Verify PCB layout compatibility before selecting the TSSOP variant.

Q: Which substitute offers the best long-term availability?

A: ICL3226IAZ (Intersil) has the highest current inventory at 4278 units. Among Analog Devices parts, MAX3226ECAE+ offers 3414 units. For extended temperature applications, ICL3226EIAZ provides 2400 units. Inventory levels should be verified with suppliers for current availability.

Q: Is RoHS compliance a critical factor for substitution?

A: The original MAX3226ECAE is RoHS non-compliant. All recommended substitutes are either ROHS3 compliant or REACH unaffected. If your application or supply chain requires RoHS compliance, select from the compliant alternatives. This is particularly important for new designs or long-term production planning.

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