TRSF3222CPWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3222CPWR 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 1134 units currently in stock. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for ongoing design support, production continuity, and long-term component availability.

Key Parameters

Parameter	TRSF3222CPWR
Manufacturer	Texas Instruments
Product Status	Obsolete
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	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	20-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the TRSF3222CPWR 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
Voltage Supply: 3V ~ 5.5V
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant or equivalent

Allowable Variation Parameters:

Data Rate: 1 Mbps or higher (lower rates are not acceptable for this application)
Receiver Hysteresis: 300 mV or 500 mV (both acceptable)
Operating Temperature: 0°C ~ 70°C or extended range (-40°C ~ 85°C)
MSL Rating: 1 or 3 (both acceptable for standard applications)
Product Status: Active preferred; obsolete acceptable if parameters match

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

Direct Manufacturer Equivalents – Texas Instruments parts with identical electrical specifications
Parametric Equivalents – Texas Instruments parts meeting all critical parameters
Cross-Manufacturer Substitutes – Active parts from Analog Devices, STMicroelectronics, and MaxLinear meeting all critical parameters

Parameter Comparison

Part Number	Manufacturer	Status	Data Rate	Receiver Hysteresis	Operating Temp	MSL	Inventory
TRSF3222CPWR	Texas Instruments	Obsolete	1 Mbps	300 mV	0°C ~ 70°C	1	1134
TRSF3222ECPWR	Texas Instruments	Obsolete	500 kbps	300 mV	0°C ~ 70°C	1	3200
SN75C3222EPWR	Texas Instruments	Obsolete	1 Mbps	300 mV	0°C ~ 70°C	1	2362
SN75C3222PWR	Texas Instruments	Obsolete	1 Mbps	300 mV	0°C ~ 70°C	1	1979
MAX3222ECUP+	Analog Devices Inc./Maxim Integrated	Active	1 Mbps	500 mV	0°C ~ 70°C	1	22335
MAX3222ECUP+T	Analog Devices Inc./Maxim Integrated	Active	1 Mbps	500 mV	0°C ~ 70°C	1	3120
ST3222ECTR	STMicroelectronics	Active	250 kbps	500 mV	0°C ~ 70°C	3	10100
SP3222EBEY-L/TR	MaxLinear, Inc.	Active	250 kbps	300 mV	-40°C ~ 85°C	1	782
SP3222ECY-L/TR	MaxLinear, Inc.	Active	235 kbps	300 mV	0°C ~ 70°C	1	2170
SP3222EEY-L/TR	MaxLinear, Inc.	Active	235 kbps	300 mV	-40°C ~ 85°C	1	18633
SP3222EUEY-L/TR	MaxLinear, Inc.	Active	1 Mbps	300 mV	-40°C ~ 85°C	1	4125

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

SN75C3222PWR and SN75C3222EPWR are Texas Instruments parts meeting all electrical and mechanical specifications of the TRSF3222CPWR. Both are obsolete but available in stock. These are suitable for applications requiring exact parameter matching.

For Active Component Sourcing:

SP3222EUEY-L/TR (MaxLinear, Inc.) is the preferred active substitute. It matches the 1 Mbps data rate, 300 mV receiver hysteresis, 3V ~ 5.5V supply voltage, and 20-TSSOP package. Extended operating temperature range (-40°C ~ 85°C) provides additional design margin. ROHS3 compliant with MSL 1 rating.
MAX3222ECUP+T (Analog Devices Inc./Maxim Integrated) is an alternative active substitute with 1 Mbps data rate and identical package. Receiver hysteresis is 500 mV (acceptable variation). Active product status with high inventory availability (3120 units).

For Cost-Optimized Sourcing:

SP3222EEY-L/TR (MaxLinear, Inc.) offers extended temperature range (-40°C ~ 85°C) and highest inventory availability (18633 units). Data rate is 235 kbps, which is lower than the original 1 Mbps specification. This part is suitable only for applications where the lower data rate does not impact system performance.

Compliance Considerations: All recommended substitutes are ROHS3 compliant and REACH unaffected, matching the original part's environmental certifications.

Frequently Asked Questions (FAQ)

Q: Can I use ST3222ECTR as a direct replacement for TRSF3222CPWR? A: ST3222ECTR meets the critical parameters (RS232, 2/2 configuration, full duplex, 3V ~ 5.5V supply, 20-TSSOP package). However, its data rate is 250 kbps compared to the original 1 Mbps. This part is suitable only if your application does not require 1 Mbps communication speed. MSL rating is 3 (168 hours) instead of 1 (unlimited).

Q: What is the difference between MAX3222ECUP+ and MAX3222ECUP+T? A: Both are Analog Devices MAX3222 parts with identical electrical specifications. The difference is packaging: MAX3222ECUP+ is supplied in Tube packaging, while MAX3222ECUP+T is supplied in Tape & Reel (TR) format. Select based on your procurement and assembly requirements.

Q: Why do some substitutes have lower data rates (235 kbps or 250 kbps)? A: These parts meet all other critical parameters but have reduced maximum data rates. They are acceptable substitutes only if your application operates at or below their specified data rate. For applications requiring 1 Mbps operation, select SP3222EUEY-L/TR, MAX3222ECUP+, MAX3222ECUP+T, SN75C3222EPWR, or SN75C3222PWR.

Q: Is receiver hysteresis variation (300 mV vs. 500 mV) significant? A: Both 300 mV and 500 mV receiver hysteresis values are acceptable for RS232 transceiver applications. Higher hysteresis (500 mV) provides improved noise immunity in electrically noisy environments. Lower hysteresis (300 mV) allows faster signal transitions. Select based on your system's noise environment and timing requirements.

Q: Can I use parts with extended operating temperature range (-40°C ~ 85°C) in place of 0°C ~ 70°C parts? A: Yes. Extended temperature range parts are suitable for applications with standard temperature requirements. They provide additional design margin and are acceptable substitutes. However, they may have different pricing and lead times.

Q: What does MSL 1 vs. MSL 3 mean for component selection? A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control. MSL 3 requires controlled storage (168 hours maximum exposure to 85°C/85% RH before reflow). For standard manufacturing environments with proper moisture control, both are acceptable. MSL 1 parts offer simpler handling and storage requirements.

Q: Which substitute offers the best long-term availability? A: SP3222EEY-L/TR (MaxLinear, Inc.) has the highest current inventory (18633 units) and active product status, indicating ongoing manufacturer support. For critical applications requiring long-term component availability, this is the recommended choice.

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