TRSF3222IPWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3222IPWR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 20-TSSOP surface mount package. This part is classified as obsolete, with 952 units currently in stock. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity, production planning, and long-term component availability. Substitute parts must maintain compatibility across electrical specifications, mechanical packaging, and functional performance parameters.

Key Parameters

Parameter	TRSF3222IPWR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	1 Mbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	20-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following critical parameters:

Mandatory Compatibility Parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage - Supply: 3V ~ 5.5V
Mounting Type: Surface Mount
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
Operating Temperature Range: -40°C ~ 85°C (or subset thereof)

Allowable Variation Parameters:

Receiver Hysteresis: 300 mV or 500 mV (both acceptable for RS232 full-duplex operation)
Data Rate: 235 Kbps to 1 Mbps (all rates support RS232 protocol requirements)
RoHS Status: ROHS3 Compliant or RoHS Compliant
Moisture Sensitivity Level: 1 (Unlimited) or 3 (168 Hours)
Product Status: Active preferred; obsolete acceptable if all electrical parameters match

Substitute parts are grouped into three categories based on their relationship to the main part:

Category 1: Direct Manufacturer Equivalents (Texas Instruments) Parts from the same manufacturer with identical or superior electrical specifications and active product status.

Category 2: Parametric Equivalents (Cross-Manufacturer) Parts from alternative manufacturers (Analog Devices Inc./Maxim Integrated, STMicroelectronics, MaxLinear, Inc.) that meet all mandatory compatibility parameters and maintain electrical performance within acceptable ranges.

Category 3: Manufacturer-Recommended Substitutes Parts explicitly recommended by manufacturers as direct replacements, with full functional equivalence and compliance certification.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	Operating Temperature	RoHS Status	MSL	Inventory (Pcs)
TRSF3222IPWR	Texas Instruments	Obsolete	1 Mbps	300 mV	-40°C ~ 85°C	ROHS3 Compliant	1	952
TRSF3222EIPWR	Texas Instruments	Active	500 kbps	300 mV	-40°C ~ 85°C	ROHS3 Compliant	1	2780
SN65C3222EPWR	Texas Instruments	Active	1 Mbps	300 mV	-40°C ~ 85°C	ROHS3 Compliant	1	3720
MAX3222EEUP+	Analog Devices Inc./Maxim Integrated	Active	1 Mbps	500 mV	-40°C ~ 85°C	ROHS3 Compliant	1	2987
MAX3222EEUP+T	Analog Devices Inc./Maxim Integrated	Active	1 Mbps	500 mV	-40°C ~ 85°C	ROHS3 Compliant	1	45400
MAX3222EEUP/V+	Analog Devices Inc./Maxim Integrated	Active	250 kbps	500 mV	-40°C ~ 85°C	ROHS3 Compliant	1	774
ST3222EBTR	STMicroelectronics	Active	250 kbps	500 mV	-40°C ~ 85°C	ROHS3 Compliant	3	1256
SP3222EBEY-L/TR	MaxLinear, Inc.	Active	250 kbps	300 mV	-40°C ~ 85°C	RoHS Compliant	1	782
SP3222ECY-L/TR	MaxLinear, Inc.	Active	235 Kbps	300 mV	0°C ~ 70°C	ROHS3 Compliant	1	2170
SP3222EEY-L/TR	MaxLinear, Inc.	Active	235 Kbps	300 mV	-40°C ~ 85°C	ROHS3 Compliant	1	18633
SP3222EUCY-L/TR	MaxLinear, Inc.	Active	1 Mbps	300 mV	0°C ~ 70°C	RoHS Compliant	1	22700

Engineering Selection Recommendations

Primary Recommendation: SN65C3222EPWR (Texas Instruments)

The SN65C3222EPWR is the optimal substitute for the TRSF3222IPWR. Both parts are manufactured by Texas Instruments, maintain identical electrical specifications (1 Mbps data rate, 300 mV receiver hysteresis, -40°C to 85°C operating range), share the same 20-TSSOP package, and carry ROHS3 compliance with MSL 1 rating. The SN65C3222EPWR holds active product status with 3720 units in inventory, ensuring long-term availability and supply chain continuity.

Secondary Recommendation: MAX3222EEUP+T (Analog Devices Inc./Maxim Integrated)

The MAX3222EEUP+T provides cross-manufacturer compatibility with the highest inventory availability (45400 units). It maintains 1 Mbps data rate performance, identical supply voltage range, and -40°C to 85°C operating temperature. The 500 mV receiver hysteresis specification exceeds the original 300 mV requirement, providing enhanced noise immunity. ROHS3 compliance and MSL 1 rating ensure regulatory and environmental compatibility. Cut Tape & Digi-Reel packaging supports both prototype and production workflows.

Tertiary Recommendation: SP3222EEY-L/TR (MaxLinear, Inc.)

The SP3222EEY-L/TR offers the largest inventory position (18633 units) among substitute options. It matches the original 300 mV receiver hysteresis and -40°C to 85°C operating temperature range. The 235 Kbps data rate is conservative relative to the original 1 Mbps specification but remains fully compatible with RS232 protocol requirements. ROHS3 compliance and MSL 1 rating maintain regulatory alignment.

Compatibility Notes:

All recommended substitutes maintain the mandatory 2/2 full-duplex RS232 transceiver configuration, 3V to 5.5V supply voltage range, and 20-TSSOP surface mount package. Receiver hysteresis variations (300 mV vs. 500 mV) do not affect functional compatibility; higher hysteresis values provide improved noise rejection. Data rate variations support all standard RS232 communication speeds. Operating temperature range subsets (0°C to 70°C) are acceptable for applications not requiring full -40°C to 85°C coverage.

Frequently Asked Questions (FAQ)

Q: Can I substitute the TRSF3222IPWR with any of the listed parts without circuit modification?

A: Yes. All listed substitute parts maintain identical pinout, package footprint (20-TSSOP), and electrical interface specifications (3V to 5.5V supply, RS232 protocol, 2/2 full-duplex configuration). No circuit modifications are required. Receiver hysteresis and data rate variations do not necessitate design changes.

Q: What is the difference between 300 mV and 500 mV receiver hysteresis?

A: Receiver hysteresis defines the voltage differential between logic state transitions. Both 300 mV and 500 mV specifications meet RS232 protocol requirements. The 500 mV specification (found in MAX3222 variants) provides enhanced noise immunity in electrically noisy environments. The 300 mV specification (original and MaxLinear variants) is standard for typical RS232 applications. Selection depends on application noise environment, not functional compatibility.

Q: Why do some substitutes have lower data rates (235 Kbps, 250 Kbps) than the original (1 Mbps)?

A: RS232 protocol supports data rates from 300 baud to 115.2 kbps in standard applications, with extended rates up to 1 Mbps in specialized implementations. All listed substitutes support data rates exceeding typical RS232 requirements. Lower-rated parts (235 Kbps, 250 Kbps) are fully compatible with standard RS232 communication speeds. Selection of lower-rate parts is acceptable unless the application specifically requires 1 Mbps operation.

Q: What is the significance of operating temperature range differences (0°C to 70°C vs. -40°C to 85°C)?

A: The original TRSF3222IPWR and most substitutes support the extended -40°C to 85°C industrial temperature range. Some MaxLinear variants (SP3222ECY-L/TR, SP3222EUCY-L/TR) support the narrower 0°C to 70°C commercial temperature range. Selection depends on application environment. Industrial applications requiring -40°C to 85°C coverage should use parts with matching temperature specifications. Commercial applications operating within 0°C to 70°C can use either specification.

Q: How do RoHS and ROHS3 compliance differences affect substitution?

A: Both RoHS and ROHS3 designations indicate compliance with hazardous substance restrictions. ROHS3 represents the current standard with updated substance restrictions. RoHS (earlier designation) and ROHS3 are both acceptable for new designs. All listed substitutes carry either RoHS or ROHS3 compliance, ensuring regulatory alignment with current environmental standards.

Q: What does MSL 1 (Unlimited) vs. MSL 3 (168 Hours) mean for component handling?

A: Moisture Sensitivity Level (MSL) defines storage and handling requirements. MSL 1 (Unlimited) allows indefinite storage without moisture control. MSL 3 (168 Hours) requires moisture control and limits shelf life to 168 hours after packaging opening. The original TRSF3222IPWR and most substitutes carry MSL 1 rating. The ST3222EBTR carries MSL 3 rating, requiring stricter moisture management during assembly. Selection depends on manufacturing process and storage capabilities.

Q: Which substitute offers the best inventory availability?

A: The MAX3222EEUP+T (Analog Devices Inc./Maxim Integrated) provides the highest inventory position with 45400 units in stock, followed by SP3222EUCY-L/TR (MaxLinear, Inc.) with 22700 units. Both parts ensure immediate availability for production and prototyping. The SN65C3222EPWR (Texas Instruments) offers 3720 units with identical electrical specifications to the original part.

Q: Are there packaging format differences between substitutes?

A: Yes. Packaging formats include Cut Tape (CT) & Digi-Reel, Tape & Reel (TR), and Tube. These formats do not affect electrical performance or compatibility. Selection depends on manufacturing workflow: Cut Tape & Digi-Reel supports both prototype and production volumes; Tape & Reel optimizes high-volume production; Tube packaging supports lower-volume applications. All formats are compatible with standard surface mount assembly equipment.

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