TRSF3222CPWRG4 RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3222CPWRG4 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, making equivalent and substitute parts necessary for ongoing design support, production continuity, and component sourcing. The device operates across a 3V to 5.5V supply range with a 300 mV receiver hysteresis and supports data rates up to 1 Mbps within an operating temperature range of 0°C to 70°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRSF3222CPWRG4
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	1 Mbps
Receiver Hysteresis	300 mV
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the TRSF3222CPWRG4 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
Voltage - Supply: 3V ~ 5.5V
Mounting Type: Surface Mount

Allowable Variation Parameters:

Data Rate: Substitute parts may operate at equal or higher data rates (minimum 1 Mbps for direct equivalents; lower rates acceptable for parametric equivalents)
Receiver Hysteresis: Substitute parts may have equal or higher hysteresis values (300 mV or 500 mV acceptable)
Operating Temperature: Substitute parts may support equal or wider temperature ranges
Moisture Sensitivity Level (MSL): Substitute parts may have equal or lower MSL ratings (1 or 3 acceptable)
Product Status: Active parts are preferred over obsolete parts for new designs

Substitute parts are grouped into three categories: Direct Manufacturer Equivalents (same manufacturer, identical electrical specifications), Parametric Equivalents (same manufacturer, allowable parameter variations), and Manufacturer-Recommended Alternatives (different manufacturers, full compatibility within allowed parameters).

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Operating Temperature	MSL	Product Status	Inventory
TRSF3222CPWRG4	Texas Instruments	1 Mbps	300 mV	0°C ~ 70°C	1	Obsolete	990 Pcs
TRSF3222ECPWR	Texas Instruments	500 kbps	300 mV	0°C ~ 70°C	1	Obsolete	3200 Pcs
SN75C3222EPWR	Texas Instruments	1 Mbps	300 mV	0°C ~ 70°C	1	Obsolete	2362 Pcs
SN75C3222PWR	Texas Instruments	1 Mbps	300 mV	0°C ~ 70°C	1	Obsolete	1979 Pcs
MAX3222ECUP+	Analog Devices Inc./Maxim Integrated	1 Mbps	500 mV	0°C ~ 70°C	1	Active	22335 Pcs
MAX3222ECUP+T	Analog Devices Inc./Maxim Integrated	1 Mbps	500 mV	0°C ~ 70°C	1	Active	3120 Pcs
ST3222ECTR	STMicroelectronics	250 kbps	500 mV	0°C ~ 70°C	3	Active	10100 Pcs
SP3222EBEY-L/TR	MaxLinear, Inc.	250 kbps	300 mV	-40°C ~ 85°C	1	Active	782 Pcs
SP3222ECY-L/TR	MaxLinear, Inc.	235 kbps	300 mV	0°C ~ 70°C	1	Active	2170 Pcs
SP3222EEY-L/TR	MaxLinear, Inc.	235 kbps	300 mV	-40°C ~ 85°C	1	Active	18633 Pcs
SP3222EUEY-L/TR	MaxLinear, Inc.	1 Mbps	300 mV	-40°C ~ 85°C	1	Active	4125 Pcs

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Obsolete): SN75C3222PWR and SN75C3222EPWR are parametric equivalents from Texas Instruments with identical electrical specifications to the TRSF3222CPWRG4. Both maintain 1 Mbps data rate, 300 mV receiver hysteresis, and 0°C to 70°C operating temperature. These parts are suitable for legacy system maintenance where component sourcing from the original manufacturer is required.

For Active Component Substitution: MAX3222ECUP+ and MAX3222ECUP+T from Analog Devices Inc./Maxim Integrated are direct functional equivalents with active product status. These parts match the 1 Mbps data rate and supply voltage range. The 500 mV receiver hysteresis is within allowable variation. MAX3222ECUP+T is packaged in Tape & Reel format, while MAX3222ECUP+ is supplied in Tube packaging. Both offer superior long-term availability compared to obsolete alternatives.

For Extended Temperature Range Applications: SP3222EUEY-L/TR from MaxLinear, Inc. provides 1 Mbps data rate with extended operating temperature range (-40°C to 85°C) and active product status. This part is suitable for designs requiring wider temperature performance while maintaining full electrical compatibility.

For Standard Industrial Applications: ST3222ECTR from STMicroelectronics is an active part with 250 kbps data rate and 500 mV receiver hysteresis. While data rate is reduced, this part meets all mechanical and electrical compatibility requirements. MSL rating of 3 requires 168-hour dry storage consideration.

For Cost-Optimized Designs: SP3222ECY-L/TR and SP3222EEY-L/TR from MaxLinear, Inc. offer active product status with 235 kbps data rate. SP3222EEY-L/TR includes extended temperature range (-40°C to 85°C) and represents the highest inventory availability (18,633 Pcs).

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower data rate than the original TRSF3222CPWRG4?

A: Yes. The TRSF3222CPWRG4 operates at 1 Mbps. Substitute parts with lower data rates (250 kbps, 235 kbps, or 500 kbps) are electrically compatible and will function correctly in applications that do not require the full 1 Mbps bandwidth. Verify your application's actual data rate requirement before selection.

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

A: Receiver hysteresis determines the voltage difference between the rising and falling threshold levels of the input comparator. Both 300 mV and 500 mV hysteresis values are acceptable substitutes. Higher hysteresis (500 mV) provides improved noise immunity in electrically noisy environments but may reduce sensitivity to weak input signals.

Q: Are all substitute parts compatible with the 20-TSSOP package footprint?

A: Yes. All listed substitute parts use the 20-TSSOP (0.173", 4.40mm Width) package. PCB footprints are mechanically and electrically identical, allowing direct board-level substitution without layout modifications.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: MSL indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering. MSL 1 (Unlimited) parts have no time restriction. MSL 3 (168 Hours) parts, such as ST3222ECTR, require dry storage and must be soldered within 168 hours of package opening. Select MSL 1 parts for applications with flexible manufacturing schedules.

Q: Why should I choose an active product over an obsolete part?

A: Active products offer long-term availability, ongoing manufacturer support, and stable pricing. Obsolete parts face eventual supply discontinuation and may command premium pricing as inventory depletes. For new designs or production planning beyond 12 months, active parts are strongly preferred.

Q: Can I use MAX3222ECUP+ (Tube packaging) in automated assembly?

A: MAX3222ECUP+ is supplied in Tube packaging, which requires manual feeding or special handling in automated pick-and-place systems. MAX3222ECUP+T is the same part in Tape & Reel (TR) format, optimized for automated assembly. Select the TR variant for high-volume production.

Q: What is the difference between SP3222 variants (ECY, EEY, EBEY, EUEY)?

A: These variants differ in data rate, operating temperature range, and packaging format. SP3222EUEY-L/TR offers 1 Mbps with extended temperature (-40°C to 85°C). SP3222ECY-L/TR and SP3222EEY-L/TR operate at 235 kbps; EEY includes extended temperature. SP3222EBEY-L/TR operates at 250 kbps with extended temperature. Select based on your specific data rate and temperature requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification, meeting environmental and hazardous substance restrictions. The original TRSF3222CPWRG4 is also RoHS3 compliant.

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