MAX3222ECAP RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3222ECAP is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-SSOP surface mount package. This component operates across a 3V to 5.5V supply range with a 1Mbps data rate and 500mV receiver hysteresis. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring RS232 interface functionality.

Key Parameters

Parameter	MAX3222ECAP
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Receiver Hysteresis	500mV
Package/Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across electrical and mechanical specifications. The following criteria define valid substitutes for the MAX3222ECAP:

Core Compatibility Parameters:

Protocol: RS232
Drivers/Receivers: 2/2 configuration
Duplex: Full
Voltage Supply: 3V ~ 5.5V (minimum requirement)
Package/Case: 20-SSOP or 20-TSSOP (same footprint family)
Mounting Type: Surface Mount

Substitution Categories:

Parametric Equivalents maintain identical electrical specifications and package form factor. These parts are direct functional replacements with matching data rates, hysteresis, and temperature ranges.

Direct Manufacturer Alternatives provide the same 2/2 RS232 transceiver functionality with minor variations in data rate or hysteresis that remain within acceptable operating parameters for RS232 applications.

Upgrade Parts offer enhanced specifications including extended temperature ranges (-40°C to 85°C), improved RoHS compliance, or superior data rate performance while maintaining core 2/2 RS232 transceiver functionality and package compatibility.

Manufacturer Recommended Parts are actively supported alternatives from Analog Devices Inc. with enhanced performance characteristics and full RoHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	Operating Temp	Package	RoHS Status	Inventory
MAX3222ECAP	Analog Devices/Maxim	Obsolete	1Mbps	500mV	0°C ~ 70°C	20-SSOP	Non-compliant	3476 Pcs
MAX3222ECAP+	Analog Devices/Maxim	Active	1Mbps	500mV	0°C ~ 70°C	20-SSOP	ROHS3 Compliant	2060 Pcs
MAX3225CAP+	Analog Devices/Maxim	Active	1Mbps	500mV	0°C ~ 70°C	20-SSOP	ROHS3 Compliant	1900 Pcs
MAX3225ECAP+	Analog Devices/Maxim	Active	1Mbps	500mV	0°C ~ 70°C	20-SSOP	ROHS3 Compliant	3400 Pcs
ST3222ECPR	STMicroelectronics	Active	250kbps	500mV	0°C ~ 70°C	20-SSOP	ROHS3 Compliant	1417 Pcs
SP3222EBEA-L/TR	MaxLinear, Inc.	Active	250kbps	300mV	-40°C ~ 85°C	20-SSOP	RoHS Compliant	3756 Pcs
ST3222EBPR	STMicroelectronics	Active	250kbps	500mV	-40°C ~ 85°C	20-SSOP	ROHS3 Compliant	17100 Pcs
ADM3222ARSZ	Analog Devices Inc.	Active	460Kbps	400mV	-40°C ~ 85°C	20-SSOP	ROHS3 Compliant	12700 Pcs
ADM3222ARSZ-REEL	Analog Devices Inc.	Active	460Kbps	400mV	-40°C ~ 85°C	20-SSOP	ROHS3 Compliant	1900 Pcs
ADM3222ARSZ-REEL7	Analog Devices Inc.	Active	460Kbps	400mV	-40°C ~ 85°C	20-SSOP	ROHS3 Compliant	28600 Pcs
ADM3222ARUZ	Analog Devices Inc.	Active	460Kbps	400mV	-40°C ~ 85°C	20-TSSOP	ROHS3 Compliant	1563 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): MAX3222ECAP+ and MAX3225ECAP+ are active production parts maintaining the original electrical and thermal specifications. Both offer ROHS3 compliance and are recommended for designs requiring no specification changes from the obsolete MAX3222ECAP.

For Standard Industrial Applications (0°C to 70°C): ST3222ECPR provides active production status with ROHS3 compliance. The 250kbps data rate remains suitable for standard RS232 communication protocols. This part is available in high volume (1417 Pcs).

For Extended Temperature Range Applications (-40°C to 85°C): SP3222EBEA-L/TR, ST3222EBPR, ADM3222ARSZ, ADM3222ARSZ-REEL, ADM3222ARSZ-REEL7, and ADM3222ARUZ all support extended operating temperatures. ST3222EBPR offers the highest inventory availability (17100 Pcs) with ROHS3 compliance. ADM3222 variants provide higher data rates (460Kbps) with ROHS3 compliance and unlimited MSL rating.

For Package Footprint Alternatives: ADM3222ARUZ uses a 20-TSSOP package (0.173", 4.40mm Width) instead of 20-SSOP, suitable for space-constrained layouts while maintaining electrical compatibility.

For RoHS Compliance Requirements: All substitute parts except the original MAX3222ECAP meet RoHS compliance standards. MAX3222ECAP+, MAX3225CAP+, MAX3225ECAP+, ST3222ECPR, ST3222EBPR, and all ADM3222 variants carry ROHS3 certification. SP3222EBEA-L/TR carries RoHS Compliant status.

Frequently Asked Questions (FAQ)

Q: Can MAX3222ECAP+ be used as a direct replacement for MAX3222ECAP? A: Yes. MAX3222ECAP+ maintains identical electrical specifications (1Mbps data rate, 500mV hysteresis, 0°C to 70°C operating range) and package form factor (20-SSOP). The primary difference is active production status and ROHS3 compliance.

Q: What is the difference between MAX3225CAP+ and MAX3225ECAP+? A: Both parts share identical electrical specifications and package form factor. The difference lies in manufacturing date codes and inventory batches. Both are suitable for MAX3222ECAP replacement.

Q: Can I use ST3222ECPR in place of MAX3222ECAP? A: ST3222ECPR is compatible for applications where 250kbps data rate is acceptable. The original MAX3222ECAP supports 1Mbps. If your application requires the full 1Mbps data rate, use MAX3222ECAP+, MAX3225CAP+, or MAX3225ECAP+ instead.

Q: What are the advantages of ADM3222ARSZ over the original MAX3222ECAP? A: ADM3222ARSZ offers extended operating temperature range (-40°C to 85°C versus 0°C to 70°C), higher data rate (460Kbps), ROHS3 compliance, and unlimited MSL rating. These enhancements make it suitable for industrial and automotive applications.

Q: Should I choose ADM3222ARSZ or ADM3222ARUZ? A: Both parts are electrically identical. ADM3222ARSZ uses 20-SSOP packaging (0.209" width), while ADM3222ARUZ uses 20-TSSOP packaging (0.173" width). Choose based on your PCB layout requirements. TSSOP offers a smaller footprint for space-constrained designs.

Q: What is the difference between ADM3222ARSZ-REEL and ADM3222ARSZ-REEL7? A: Both parts are electrically identical with identical specifications. The difference is in packaging format and inventory batch. ADM3222ARSZ-REEL7 has significantly higher availability (28600 Pcs versus 1900 Pcs).

Q: Is SP3222EBEA-L/TR suitable for high-speed RS232 applications? A: SP3222EBEA-L/TR supports 250kbps data rate. For applications requiring 1Mbps or higher data rates, use MAX3222ECAP+, MAX3225CAP+, or MAX3225ECAP+. For 460Kbps applications, ADM3222 variants are recommended.

Q: Can I use these parts interchangeably on the same PCB? A: Parts with identical package designations (20-SSOP) are pin-compatible and can be used interchangeably on the same PCB layout. ADM3222ARUZ (20-TSSOP) requires a different footprint and cannot be used on boards designed for 20-SSOP packages.

Q: Which substitute part has the best long-term availability? A: ST3222EBPR offers the highest current inventory (17100 Pcs) with active production status and ROHS3 compliance. ADM3222ARSZ-REEL7 also provides strong availability (28600 Pcs) with extended temperature range support.

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