MAX3221CPWRG4 Equivalent & Substitute Parts

Part Overview

The MAX3221CPWRG4 is a full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 16-TSSOP surface mount package. This interface IC operates across a 3V to 5.5V supply range with a 250 kbps data rate and 500 mV receiver hysteresis, designed for serial communication applications requiring single driver/receiver configuration.

The MAX3221CPWRG4 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from Texas Instruments and alternative manufacturers including Renesas Electronics Corporation and Intersil, offering continued design support and component availability for new production and replacement applications.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	1/1
Duplex	Full
Data Rate	250 kbps
Voltage Supply Range	3V to 5.5V
Operating Temperature	0°C to 70°C
Mounting Type	Surface Mount
Package	16-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX3221CPWRG4 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

RS232 protocol compliance
1/1 driver/receiver configuration
Full-duplex operation
250 kbps data rate capability
3V to 5.5V supply voltage range
0°C to 70°C operating temperature
Surface mount technology
ROHS3 compliance

Package Compatibility Considerations:

16-TSSOP package (0.173", 4.40mm Width) allows direct substitution with identical pinout
16-SSOP package (0.209", 5.30mm Width) requires PCB layout verification due to different body width

Substitute parts are grouped into two categories: parametric equivalents from Texas Instruments with identical electrical specifications and packaging, and manufacturer-recommended alternatives from Renesas Electronics Corporation and Intersil that meet functional requirements with minor parameter variations in receiver hysteresis or package form factor.

Parameter Comparison

Part Number	Manufacturer	Product Status	Package	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temp	RoHS Status	Inventory
MAX3221CPWRG4	Texas Instruments	Discontinued at DiGi Electronics	16-TSSOP	500 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	1108 Pcs
MAX3221CPWR	Texas Instruments	Active	16-TSSOP	500 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	65200 Pcs
MAX3221CPWRE4	Texas Instruments	Discontinued at DiGi Electronics	16-TSSOP	500 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	1839 Pcs
MAX3221ECPWR	Texas Instruments	Active	16-TSSOP	500 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	3816 Pcs
TRS3221ECPWR	Texas Instruments	Active	16-TSSOP	500 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	4835 Pcs
ICL3221CAZ	Renesas Electronics	Active	16-SSOP	300 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	5100 Pcs
ICL3221CAZ-T	Renesas Electronics	Active	16-SSOP	300 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	5400 Pcs
ICL3221CVZ	Intersil	Active	16-TSSOP	300 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	1978 Pcs
ICL3221CVZ-T	Renesas Electronics	Active	16-TSSOP	300 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	3460 Pcs
ICL3221ECAZ	Renesas Electronics	Active	16-SSOP	500 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	8175 Pcs
ICL3221ECAZ-T	Renesas Electronics	Active	16-SSOP	500 mV	250 kbps	3V–5.5V	0°C–70°C	ROHS3	1613 Pcs

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Package Specifications):

MAX3221CPWR and MAX3221ECPWR are parametric equivalents to MAX3221CPWRG4, maintaining identical 16-TSSOP packaging, 500 mV receiver hysteresis, and all electrical specifications. Both are currently active products with significantly higher inventory availability. MAX3221CPWR is available in Cut Tape and Digi-Reel packaging with 65,200 units in stock. MAX3221ECPWR is available in Cut Tape and Digi-Reel packaging with 3,816 units in stock.

TRS3221ECPWR is a Texas Instruments parametric equivalent with identical electrical performance and 16-TSSOP packaging, currently active with 4,835 units available.

Alternative Substitutes (Functional Equivalence with Package Variation):

ICL3221ECAZ and ICL3221ECAZ-T from Renesas Electronics Corporation are functionally equivalent RS232 transceivers with matching 500 mV receiver hysteresis and electrical specifications. These parts use 16-SSOP packaging (0.209", 5.30mm Width) instead of 16-TSSOP, requiring PCB layout verification for pin-to-pin compatibility and clearance. Both are active products with 8,175 and 1,613 units respectively.

ICL3221CAZ and ICL3221CAZ-T from Renesas Electronics Corporation provide functional equivalence with 300 mV receiver hysteresis in 16-SSOP packaging. The reduced hysteresis specification may be suitable for applications with adequate noise margins. Both are active with 5,100 and 5,400 units available.

ICL3221CVZ and ICL3221CVZ-T maintain 16-TSSOP packaging compatibility with 300 mV receiver hysteresis. ICL3221CVZ-T from Renesas Electronics is active with 3,460 units. ICL3221CVZ from Intersil is active with 1,978 units.

All substitute parts maintain ROHS3 compliance and operate across the identical 3V to 5.5V supply range and 0°C to 70°C temperature specification.

Frequently Asked Questions (FAQ)

Q: Can MAX3221CPWR directly replace MAX3221CPWRG4 without PCB modifications?

A: Yes. MAX3221CPWR is a parametric equivalent with identical 16-TSSOP packaging, pinout, electrical specifications, and performance characteristics. No PCB layout changes are required.

Q: What is the difference between 16-TSSOP and 16-SSOP packages?

A: 16-TSSOP has a body width of 0.173" (4.40mm), while 16-SSOP has a body width of 0.209" (5.30mm). Both maintain identical pin pitch and pinout. PCB footprint verification is required when substituting between these package types to ensure clearance and trace routing compatibility.

Q: Are Renesas ICL3221 parts direct substitutes for Texas Instruments MAX3221?

A: ICL3221 parts are functionally equivalent RS232 transceivers meeting the same protocol, data rate, and supply voltage specifications. Package and receiver hysteresis variations exist. ICL3221ECAZ and ICL3221ECAZ-T match the 500 mV hysteresis of MAX3221CPWRG4 but use 16-SSOP packaging. ICL3221CVZ and ICL3221CVZ-T maintain 16-TSSOP packaging but feature 300 mV hysteresis.

Q: What does receiver hysteresis affect in RS232 transceiver selection?

A: Receiver hysteresis determines the voltage differential required between logic state transitions, affecting noise immunity and signal integrity in noisy environments. The MAX3221CPWRG4 specifies 500 mV hysteresis. Substitutes with 300 mV hysteresis provide reduced noise margin but remain functionally compatible for applications with adequate signal quality.

Q: Which substitute offers the best inventory availability?

A: MAX3221CPWR from Texas Instruments offers the highest inventory with 65,200 units in stock, providing immediate availability for production requirements.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, meeting environmental and regulatory requirements equivalent to the original MAX3221CPWRG4.

Q: Can I use ICL3221CVZ in Bulk packaging instead of Tape & Reel?

A: ICL3221CVZ is available in Bulk packaging from Intersil. Packaging format selection depends on assembly process requirements. Tape & Reel formats (ICL3221CVZ-T, ICL3221CAZ-T, ICL3221ECAZ-T) are optimized for automated pick-and-place assembly.

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