TRSF3221CPWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3221CPWR is a full-duplex RS232 transceiver manufactured by Texas Instruments, designed for serial communication applications requiring single driver/receiver functionality. This interface IC operates across a 3V to 5.5V supply range with a 1 Mbps data rate and is housed in a 16-TSSOP surface mount package.

The TRSF3221CPWR is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this transceiver architecture.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the TRSF3221CPWR are qualified based on strict electrical and mechanical parameter matching:

Substitution Criteria:

Protocol: RS232
Number of Drivers/Receivers: 1/1 configuration
Duplex: Full-duplex operation
Receiver Hysteresis: 500 mV
Data Rate: 1 Mbps minimum
Voltage Supply Range: 3V ~ 5.5V
Operating Temperature: 0°C ~ 70°C
Package: 16-TSSOP form factor
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

All substitute parts listed maintain identical electrical specifications and mechanical compatibility, enabling direct replacement in existing designs without circuit modification.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Package	RoHS3	Inventory (Pcs)
TRSF3221CPWR	Texas Instruments	Obsolete	RS232	1/1	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Yes	3,151
SN75C3221PWR	Texas Instruments	Active	RS232	1/1	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Yes	18,616
TRSF3221ECPWR	Texas Instruments	Active	RS232	1/1	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Yes	8,083
MAX3227ECUE+T	Analog Devices Inc./Maxim Integrated	Active	RS232	1/1	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Yes	1,014

Engineering Selection Recommendations

Primary Substitute (Recommended): SN75C3221PWR

The SN75C3221PWR is the preferred substitute for the obsolete TRSF3221CPWR. Both are Texas Instruments products with identical electrical and mechanical specifications. The SN75C3221PWR maintains active product status and offers the highest inventory availability (18,616 units), ensuring supply chain continuity and cost-effective procurement.

Secondary Substitute: TRSF3221ECPWR

The TRSF3221ECPWR provides an alternative from Texas Instruments with active product status. This part shares the same base product architecture as the TRSF3221CPWR and maintains full parameter compatibility. Inventory availability is adequate (8,083 units) for production requirements.

Alternative Substitute: MAX3227ECUE+T

The MAX3227ECUE+T, manufactured by Analog Devices Inc./Maxim Integrated, is a cross-manufacturer equivalent meeting all electrical and mechanical requirements. This option is suitable for applications where multi-source qualification is required. Inventory is limited (1,014 units) and should be considered for secondary sourcing strategies.

All substitute parts are ROHS3 compliant and carry MSL Rating 1 (Unlimited), meeting environmental and reliability standards equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can the SN75C3221PWR directly replace the TRSF3221CPWR without circuit modifications?

A: Yes. The SN75C3221PWR is a parametric equivalent with identical electrical specifications (1/1 RS232 transceiver, 1 Mbps data rate, 3V–5.5V supply, 500 mV receiver hysteresis) and mechanical compatibility (16-TSSOP package). Direct substitution is supported without design changes.

Q: What is the difference between TRSF3221CPWR and TRSF3221ECPWR?

A: Both parts are Texas Instruments RS232 transceivers with identical electrical and mechanical parameters. The primary difference is product status: TRSF3221CPWR is obsolete, while TRSF3221ECPWR is active. The ECPWR variant is recommended for new designs and ongoing production.

Q: Is the MAX3227ECUE+T suitable for applications currently using the TRSF3221CPWR?

A: Yes. The MAX3227ECUE+T meets all specified electrical parameters (1/1 RS232 transceiver, 1 Mbps data rate, 3V–5.5V supply, 500 mV receiver hysteresis) and is housed in the same 16-TSSOP package. It is suitable for direct replacement in compatible applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (SN75C3221PWR, TRSF3221ECPWR, MAX3227ECUE+T) are RoHS3 compliant with MSL Rating 1 (Unlimited), meeting environmental and reliability standards.

Q: Which substitute part offers the best supply availability?

A: The SN75C3221PWR offers the highest inventory availability at 18,616 units in stock, making it the optimal choice for immediate procurement and sustained production requirements.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: Yes. All substitute parts maintain identical electrical specifications and 16-TSSOP package compatibility, enabling interchangeable use within the same circuit design without modification.

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