TRSF3221IPWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3221IPWR 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 1 Mbps data rate and 500 mV receiver hysteresis. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRSF3221IPWR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	1/1
Duplex	Full
Data Rate	1 Mbps
Voltage Supply Range	3V to 5.5V
Operating Temperature	-40°C to 85°C
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	500 mV
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the TRSF3221IPWR is determined by strict alignment of the following electrical and mechanical parameters:

Protocol: RS232
Package / Case: 16-TSSOP (0.173", 4.40mm Width)
Number of Drivers/Receivers: 1/1
Duplex: Full
Receiver Hysteresis: 500 mV
Voltage Supply Range: 3V to 5.5V
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories:

Texas Instruments Direct Equivalents maintain identical electrical specifications including the full -40°C to 85°C operating temperature range and 1 Mbps data rate.

Manufacturer Recommended Alternatives from Analog Devices Inc./Maxim Integrated provide functional equivalence with the same package, protocol, and supply voltage, though with variations in operating temperature range and data rate specifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Operating Temperature	Packaging	Inventory (Pcs)
TRSF3221IPWR	Texas Instruments	Obsolete	1 Mbps	-40°C to 85°C	Tube	3,669
TRSF3221ECPWR	Texas Instruments	Active	1 Mbps	0°C to 70°C	Tape & Reel (TR)	8,083
SN65C3221EPWR	Texas Instruments	Active	1 Mbps	-40°C to 85°C	Cut Tape (CT) & Digi-Reel®	3,300
SN65C3221IPWRQ1	Texas Instruments	Active	1 Mbps	-40°C to 85°C	Cut Tape (CT) & Digi-Reel®	3,356
SN65C3221PWR	Texas Instruments	Active	1 Mbps	-40°C to 85°C	Tape & Reel (TR)	2,547
TRSF3221EIPWR	Texas Instruments	Active	1 Mbps	-40°C to 85°C	Cut Tape (CT) & Digi-Reel®	18,739
MAX3221ECUE+	Analog Devices Inc./Maxim Integrated	Active	250 kbps	0°C to 70°C	Tube	2,300
MAX3221ECUE+T	Analog Devices Inc./Maxim Integrated	Active	250 kbps	0°C to 70°C	Cut Tape (CT) & Digi-Reel®	3,864
MAX3221EEUE+	Analog Devices Inc./Maxim Integrated	Active	250 kbps	-40°C to 85°C	Tube	2,700
MAX3221EEUE+T	Analog Devices Inc./Maxim Integrated	Active	250 kbps	-40°C to 85°C	Cut Tape (CT) & Digi-Reel®	7,700
MAX3227EEUE+T	Analog Devices Inc./Maxim Integrated	Active	1 Mbps	-40°C to 85°C	Cut Tape (CT) & Digi-Reel®	958

Engineering Selection Recommendations

For applications requiring full temperature range operation (-40°C to 85°C) with 1 Mbps data rate:

Select from Texas Instruments direct equivalents: SN65C3221EPWR, SN65C3221IPWRQ1, SN65C3221PWR, or TRSF3221EIPWR. These parts maintain identical electrical performance to the obsolete TRSF3221IPWR. TRSF3221EIPWR offers the highest inventory availability (18,739 units). SN65C3221IPWRQ1 includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.

For applications with restricted operating temperature (0°C to 70°C):

TRSF3221ECPWR is the manufacturer-recommended alternative, available in Tape & Reel packaging with 8,083 units in stock.

For applications where 250 kbps data rate is acceptable:

Analog Devices Inc./Maxim Integrated MAX3221 series parts provide functional equivalence. MAX3221EEUE+T supports the full -40°C to 85°C temperature range with 7,700 units available. MAX3227EEUE+T maintains 1 Mbps data rate capability with 958 units in stock.

All substitute parts maintain ROHS3 compliance and identical package geometry (16-TSSOP).

Frequently Asked Questions (FAQ)

Q: Can TRSF3221ECPWR replace TRSF3221IPWR in all applications?

A: TRSF3221ECPWR is electrically equivalent but operates only across 0°C to 70°C. Use this part only if your application does not require the full -40°C to 85°C temperature range of the original part.

Q: What is the difference between SN65C3221EPWR and SN65C3221IPWRQ1?

A: Both parts are electrically identical with -40°C to 85°C operation and 1 Mbps data rate. SN65C3221IPWRQ1 includes AEC-Q100 automotive qualification and carries MSL 2 (1 Year) moisture sensitivity versus MSL 1 (Unlimited) for SN65C3221EPWR.

Q: Are MAX3221 parts direct replacements for TRSF3221IPWR?

A: MAX3221 parts are functionally equivalent in protocol, package, and supply voltage. However, they operate at 250 kbps data rate versus 1 Mbps for the original part. Use MAX3221 parts only if your application does not require 1 Mbps operation. MAX3227EEUE+T maintains 1 Mbps capability.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel® packaging. Select based on your procurement and assembly requirements. All maintain the identical 16-TSSOP (0.173", 4.40mm Width) case geometry.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original TRSF3221IPWR specification.

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