TRS3221CPWRG4 Equivalent & Substitute Parts

Part Overview

The TRS3221CPWRG4 is a full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 16-TSSOP surface mount package. This component operates across a 3V to 5.5V supply range with a 250kbps data rate and 500mV receiver hysteresis. The part is currently obsolete, making equivalent and substitute components necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRS3221CPWRG4
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	1/1
Duplex	Full
Data Rate	250kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Receiver Hysteresis	500mV
Mounting Type	Surface Mount
Package / Case	16-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the TRS3221CPWRG4 is determined by strict alignment of the following electrical and mechanical parameters:

Protocol: RS232
Number of Drivers/Receivers: 1/1
Duplex: Full
Data Rate: 250kbps
Voltage - Supply: 3V ~ 5.5V
Mounting Type: Surface Mount
Package / Case: 16-TSSOP or compatible footprint

Substitute parts are grouped into three categories:

Parametric Equivalents maintain identical electrical specifications and 16-TSSOP packaging. These parts are direct functional replacements with no design modifications required.

Upgrade Parts extend the operating temperature range beyond the original specification (0°C ~ 70°C to -40°C ~ 85°C) while maintaining all other electrical parameters and packaging. These provide enhanced reliability for wider temperature environments.

Manufacturer Recommended Alternatives include parts with minor parameter variations. The ICL3221 series variants feature 300mV receiver hysteresis (versus 500mV) and may use 16-SSOP packaging (5.30mm width versus 4.40mm). These differences require design review but remain functionally compatible for RS232 communication.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Package	Product Status
TRS3221CPWRG4	Texas Instruments	RS232	1/1	250kbps	3V ~ 5.5V	0°C ~ 70°C	500mV	16-TSSOP	Obsolete
MAX3221CPWR	Texas Instruments	RS232	1/1	250kbps	3V ~ 5.5V	0°C ~ 70°C	500mV	16-TSSOP	Active
MAX3221CPWRE4	Texas Instruments	RS232	1/1	250kbps	3V ~ 5.5V	0°C ~ 70°C	500mV	16-TSSOP	Discontinued at DiGi Electronics
MAX3221ECPWR	Texas Instruments	RS232	1/1	250kbps	3V ~ 5.5V	0°C ~ 70°C	500mV	16-TSSOP	Active
TRS3221ECPWR	Texas Instruments	RS232	1/1	250kbps	3V ~ 5.5V	0°C ~ 70°C	500mV	16-TSSOP	Active
MAX3221EEUE+	Analog Devices Inc./Maxim Integrated	RS232	1/1	250kbps	3V ~ 5.5V	-40°C ~ 85°C	500mV	16-TSSOP	Active
MAX3221EEUE+T	Analog Devices Inc./Maxim Integrated	RS232	1/1	250kbps	3V ~ 5.5V	-40°C ~ 85°C	500mV	16-TSSOP	Active
ICL3221CAZ	Renesas Electronics Corporation	RS232	1/1	250kbps	3V ~ 5.5V	0°C ~ 70°C	300mV	16-SSOP	Active
ICL3221CAZ-T	Renesas Electronics Corporation	RS232	1/1	250kbps	3V ~ 5.5V	0°C ~ 70°C	300mV	16-SSOP	Active
ICL3221CVZ	Intersil	RS232	1/1	250kbps	3V ~ 5.5V	0°C ~ 70°C	300mV	16-TSSOP	Active
ICL3221CVZ-T	Renesas Electronics Corporation	RS232	1/1	250kbps	3V ~ 5.5V	0°C ~ 70°C	300mV	16-TSSOP	Active

Engineering Selection Recommendations

For Direct Replacement (No Design Changes Required):

MAX3221CPWR, MAX3221ECPWR, and TRS3221ECPWR are parametric equivalents with identical electrical specifications and 16-TSSOP packaging. All three are active products with ROHS3 compliance and unlimited moisture sensitivity rating. MAX3221CPWR and MAX3221ECPWR offer the highest inventory availability (65,200 and 3,816 units respectively), making them the preferred choices for production continuity.

For Extended Temperature Range Applications:

MAX3221EEUE+ and MAX3221EEUE+T extend the operating temperature range to -40°C ~ 85°C while maintaining all other electrical parameters and 16-TSSOP packaging. These parts are manufactured by Analog Devices Inc./Maxim Integrated and are active products with ROHS3 compliance. Selection between the two depends on packaging preference: MAX3221EEUE+ is supplied in Tube packaging, while MAX3221EEUE+T is supplied in Cut Tape (CT) & Digi-Reel format.

For Alternative Sourcing (Design Review Required):

ICL3221CVZ-T and ICL3221CVZ are manufacturer-recommended alternatives from Renesas Electronics Corporation and Intersil respectively. Both maintain 16-TSSOP packaging and identical electrical specifications except for receiver hysteresis (300mV versus 500mV). ICL3221CAZ and ICL3221CAZ-T use 16-SSOP packaging (5.30mm width) instead of 16-TSSOP (4.40mm width), requiring PCB layout verification. All ICL3221 variants are active products with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can MAX3221CPWR be used as a direct replacement for TRS3221CPWRG4?

A: Yes. MAX3221CPWR is a parametric equivalent with identical electrical specifications (1/1 full-duplex RS232 transceiver, 250kbps data rate, 3V ~ 5.5V supply, 500mV receiver hysteresis, 0°C ~ 70°C operating range) and identical 16-TSSOP packaging. No design modifications are required.

Q: What is the difference between MAX3221EEUE+ and MAX3221EEUE+T?

A: Both parts are identical in electrical specifications and performance. The difference is packaging format: MAX3221EEUE+ is supplied in Tube packaging, while MAX3221EEUE+T is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on your procurement and assembly process requirements.

Q: Can ICL3221CVZ-T replace TRS3221CPWRG4 without design changes?

A: ICL3221CVZ-T maintains the same 16-TSSOP package and electrical specifications except for receiver hysteresis (300mV versus 500mV on the original). The lower hysteresis value may improve noise immunity in some applications but requires design review to confirm compatibility with your specific circuit implementation.

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

A: 16-TSSOP has a body width of 0.173" (4.40mm), while 16-SSOP has a body width of 0.209" (5.30mm). If substituting ICL3221CAZ or ICL3221CAZ-T (16-SSOP), verify that your PCB layout accommodates the wider package footprint. Pin pitch and lead configuration remain compatible.

Q: Why is receiver hysteresis different on ICL3221 variants?

A: The ICL3221 series from Renesas Electronics Corporation and Intersil features 300mV receiver hysteresis compared to 500mV on the TRS3221 and MAX3221 series. This parameter affects input threshold behavior and noise immunity. Confirm that your application tolerates this specification difference before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the compliance status of the original TRS3221CPWRG4.

Q: Which substitute part has the best inventory availability?

A: MAX3221CPWR has the highest inventory availability at 65,200 units in stock, followed by MAX3221EEUE+T at 7,700 units. Both are active products suitable for immediate procurement.

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