TRS3221IPWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3221IPWR 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 supports single driver/receiver configuration. The device is Active status and ROHS3 compliant, making it suitable for legacy serial communication applications requiring industrial temperature operation (-40°C to 85°C). Substitute parts are identified when equivalent electrical parameters and mechanical compatibility are maintained across the allowed specification range.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRS3221IPWR
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	-40°C to 85°C
Package Type	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TRS3221IPWR are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Protocol: RS232
Number of Drivers/Receivers: 1/1
Duplex: Full
Data Rate: 250 kbps
Voltage Supply Range: 3V to 5.5V
Receiver Hysteresis: 500 mV (matching specification)
Operating Temperature: -40°C to 85°C (matching specification)
RoHS Status: ROHS3 Compliant
Mounting Type: Surface Mount

Package Compatibility:

16-TSSOP (0.173", 4.40mm Width) - direct pin-compatible substitutes
16-SSOP (0.209", 5.30mm Width) - alternative package with same pinout but different footprint dimensions

Substitutes are grouped into two categories: parametric equivalents with identical electrical specifications and manufacturer-recommended alternatives with minor parameter variations (receiver hysteresis, operating temperature range, or package dimensions).

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Package	RoHS Status
TRS3221IPWR	Texas Instruments	RS232	1/1	250 kbps	3V–5.5V	-40°C–85°C	500 mV	16-TSSOP	ROHS3
MAX3221EIPWR	Texas Instruments	RS232	1/1	250 kbps	3V–5.5V	-40°C–85°C	500 mV	16-TSSOP	ROHS3
MAX3221IPWR	Texas Instruments	RS232	1/1	250 kbps	3V–5.5V	-40°C–85°C	500 mV	16-TSSOP	ROHS3
TRS3221EIPWR	Texas Instruments	RS232	1/1	250 kbps	3V–5.5V	-40°C–85°C	500 mV	16-TSSOP	ROHS3
ICL3221CAZ	Renesas Electronics	RS232	1/1	250 kbps	3V–5.5V	0°C–70°C	300 mV	16-SSOP	ROHS3
ICL3221CAZ-T	Renesas Electronics	RS232	1/1	250 kbps	3V–5.5V	0°C–70°C	300 mV	16-SSOP	ROHS3
ICL3221CVZ	Intersil	RS232	1/1	250 kbps	3V–5.5V	0°C–70°C	300 mV	16-TSSOP	ROHS3
ICL3221CVZ-T	Renesas Electronics	RS232	1/1	250 kbps	3V–5.5V	0°C–70°C	300 mV	16-TSSOP	ROHS3
ICL3221ECAZ	Renesas Electronics	RS232	1/1	250 kbps	3V–5.5V	0°C–70°C	500 mV	16-SSOP	ROHS3
ICL3221ECAZ-T	Renesas Electronics	RS232	1/1	250 kbps	3V–5.5V	0°C–70°C	500 mV	16-SSOP	ROHS3
ICL3221EIAZ	Renesas Electronics	RS232	1/1	250 kbps	3V–5.5V	-40°C–85°C	500 mV	16-SSOP	ROHS3

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitutes): MAX3221EIPWR, MAX3221IPWR, and TRS3221EIPWR maintain identical electrical specifications to the TRS3221IPWR, including 500 mV receiver hysteresis, -40°C to 85°C operating temperature range, and 16-TSSOP package compatibility. These parts are Active status and ROHS3 compliant. Selection among these equivalents depends on packaging format availability (Cut Tape, Digi-Reel, or standard packaging) and inventory requirements.

Manufacturer-Recommended Alternatives: ICL3221 series parts from Renesas Electronics Corporation are manufacturer-recommended substitutes. These devices maintain RS232 protocol, 1/1 driver/receiver configuration, 250 kbps data rate, and 3V–5.5V supply voltage compatibility. Differences include:

Operating temperature range: 0°C to 70°C (narrower than TRS3221IPWR)
Receiver hysteresis: 300 mV (ICL3221CAZ, ICL3221CAZ-T, ICL3221CVZ, ICL3221CVZ-T) or 500 mV (ICL3221ECAZ, ICL3221ECAZ-T, ICL3221EIAZ)
Package options: 16-SSOP (0.209", 5.30mm Width) or 16-TSSOP (0.173", 4.40mm Width)

ICL3221EIAZ provides the closest match to TRS3221IPWR with identical operating temperature range (-40°C to 85°C) and receiver hysteresis (500 mV), differing only in package type (16-SSOP versus 16-TSSOP).

All substitute parts carry ROHS3 compliance and Active product status, ensuring regulatory alignment and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can MAX3221EIPWR directly replace TRS3221IPWR without PCB modification? A: Yes. MAX3221EIPWR is a parametric equivalent with identical electrical specifications (500 mV receiver hysteresis, -40°C to 85°C operating range) and 16-TSSOP package footprint. No PCB layout changes are required.

Q: What is the difference between 16-TSSOP and 16-SSOP packages? A: Both are 16-pin surface mount packages with identical pinout. The 16-TSSOP measures 0.173" (4.40mm) width, while 16-SSOP measures 0.209" (5.30mm) width. PCB footprints differ; verify land pattern compatibility before substitution.

Q: Why do ICL3221 parts have a narrower operating temperature range (0°C to 70°C)? A: ICL3221 series from Renesas Electronics is rated for commercial temperature operation. TRS3221IPWR and MAX3221 series support industrial temperature range (-40°C to 85°C). Select ICL3221 alternatives only if your application operates within 0°C to 70°C limits.

Q: Are there differences in receiver hysteresis between substitutes? A: Yes. TRS3221IPWR specifies 500 mV receiver hysteresis. ICL3221CAZ, ICL3221CAZ-T, ICL3221CVZ, and ICL3221CVZ-T specify 300 mV. ICL3221ECAZ, ICL3221ECAZ-T, and ICL3221EIAZ match the 500 mV specification. Hysteresis affects noise immunity; verify application requirements before selecting 300 mV alternatives.

Q: What packaging formats are available for equivalent parts? A: MAX3221EIPWR and MAX3221IPWR are supplied in Cut Tape (CT) and Digi-Reel format. TRS3221EIPWR is available in Cut Tape and Digi-Reel. ICL3221 variants are supplied in Tube, Bulk, or Tape & Reel (TR) formats depending on part number. Confirm packaging availability with your supplier.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance status, meeting regulatory requirements for hazardous substance restrictions.

Q: Which substitute offers the best inventory availability? A: TRS3221EIPWR shows the highest inventory level at 185,746 pieces. MAX3221IPWR follows with 65,300 pieces. Availability varies by supplier and region; consult current stock levels before design finalization.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message