TRSF3223CPWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3223CPWR 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 and production continuity. The device operates across a 3V to 5.5V supply range with a 1Mbps data rate and 500mV receiver hysteresis, suitable for legacy RS232 communication interfaces requiring low-voltage operation.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRSF3223CPWR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Receiver Hysteresis	500 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
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TRSF3223CPWR is determined by the following critical parameters:

Primary Matching Criteria:

RS232 protocol compliance
2/2 driver/receiver configuration
Full-duplex operation
20-TSSOP package footprint
3V to 5.5V supply voltage range
Surface mount technology

Secondary Compatibility Factors:

Data rate capability (minimum 1Mbps preferred; 250Kbps acceptable for lower-speed applications)
Receiver hysteresis (500mV primary; 300mV acceptable with design verification)
Operating temperature range (0°C to 70°C baseline; extended ranges acceptable)
Product status (active preferred for long-term availability; obsolete acceptable for legacy support)

Substitute parts are grouped into three categories: parametric equivalents from Texas Instruments, direct manufacturer alternatives from Analog Devices Inc./Maxim Integrated, and manufacturer-recommended alternatives from MaxLinear, Inc. All listed substitutes maintain identical package geometry and electrical interface compatibility.

Parameter Comparison

Part Number	Manufacturer	Status	Data Rate	Receiver Hysteresis	Operating Temp	Package	Inventory
TRSF3223CPWR	Texas Instruments	Obsolete	1Mbps	500 mV	0°C ~ 70°C	20-TSSOP	2300 Pcs
SN75C3223PWR	Texas Instruments	Obsolete	1Mbps	500 mV	0°C ~ 70°C	20-TSSOP	4772 Pcs
MAX3223ECUP+	Analog Devices Inc./Maxim Integrated	Active	250Kbps	500 mV	0°C ~ 70°C	20-TSSOP	2100 Pcs
MAX3223ECUP+T	Analog Devices Inc./Maxim Integrated	Active	250Kbps	500 mV	0°C ~ 70°C	20-TSSOP	3608 Pcs
MAX3224ECUP+	Analog Devices Inc./Maxim Integrated	Active	250Kbps	500 mV	0°C ~ 70°C	20-TSSOP	813 Pcs
MAX3224ECUP+T	Analog Devices Inc./Maxim Integrated	Active	250Kbps	500 mV	0°C ~ 70°C	20-TSSOP	816 Pcs
MAX3225ECUP+	Analog Devices Inc./Maxim Integrated	Active	1Mbps	500 mV	0°C ~ 70°C	20-TSSOP	2000 Pcs
SP3223EBEY-L/TR	MaxLinear, Inc.	Active	250Kbps	300 mV	-40°C ~ 85°C	20-TSSOP	3321 Pcs
SP3223ECY-L	MaxLinear, Inc.	Active	235Kbps	300 mV	0°C ~ 70°C	20-TSSOP	1416 Pcs
SP3223ECY-L/TR	MaxLinear, Inc.	Active	235Kbps	300 mV	0°C ~ 70°C	20-TSSOP	7330 Pcs
SP3223EEY-L	MaxLinear, Inc.	Active	235Kbps	300 mV	-40°C ~ 85°C	20-TSSOP	5965 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): SN75C3223PWR from Texas Instruments provides parametric equivalence with identical 1Mbps data rate and 500mV receiver hysteresis. Both parts are obsolete; however, SN75C3223PWR maintains higher inventory availability (4772 units versus 2300 units).

For Active Production (Recommended for New Designs): MAX3225ECUP+ from Analog Devices Inc./Maxim Integrated is the optimal choice, matching the original 1Mbps data rate and 500mV receiver hysteresis while maintaining active product status. This ensures long-term supply chain stability and manufacturer support.

For Extended Temperature Range Applications: SP3223EEY-L from MaxLinear, Inc. extends the operating temperature range to -40°C to 85°C, suitable for industrial and automotive environments. The 235Kbps data rate and 300mV receiver hysteresis remain compatible with standard RS232 communication protocols.

For Cost-Optimized Solutions: SP3223ECY-L/TR from MaxLinear, Inc. offers the highest inventory availability (7330 units) with active product status. The reduced data rate (235Kbps) and hysteresis (300mV) are acceptable for legacy RS232 applications operating below 1Mbps.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical 20-TSSOP package geometry, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can MAX3223ECUP+ or MAX3224ECUP+ be used as direct replacements for TRSF3223CPWR? A: Yes, with application-specific considerations. Both parts maintain identical supply voltage range (3V to 5.5V), receiver hysteresis (500mV), operating temperature (0°C to 70°C), and 20-TSSOP package. However, the data rate is reduced to 250Kbps. For applications operating at or below 250Kbps, these parts are fully compatible. For applications requiring 1Mbps operation, MAX3225ECUP+ is the appropriate substitute.

Q: What is the difference between MAX3223ECUP+ and MAX3223ECUP+T? A: Both parts are electrically identical. The suffix "+T" indicates Tape & Reel packaging, while the base part number indicates Tube packaging. Selection depends on assembly process requirements and volume. Tape & Reel packaging is standard for automated pick-and-place assembly; Tube packaging is suitable for manual assembly or lower-volume applications.

Q: Are SP3223 series parts compatible with the original TRSF3223CPWR? A: SP3223 series parts from MaxLinear, Inc. are compatible with identical 2/2 full-duplex RS232 configuration, 3V to 5.5V supply range, and 20-TSSOP package. The receiver hysteresis is reduced to 300mV (versus 500mV), and data rates range from 235Kbps to 250Kbps. These differences are acceptable for standard RS232 communication and do not require circuit modifications.

Q: Why do some substitutes have lower data rates than the original part? A: The TRSF3223CPWR operates at 1Mbps, which is the maximum practical data rate for RS232 transceivers in this package class. Substitute parts from Maxim Integrated and MaxLinear operate at 250Kbps or 235Kbps, which remains compliant with RS232 specifications and is suitable for the majority of legacy communication applications. Applications requiring 1Mbps operation should select MAX3225ECUP+ or SN75C3223PWR.

Q: Is receiver hysteresis difference (500mV versus 300mV) significant for substitution? A: Receiver hysteresis affects noise immunity and signal integrity. The original 500mV hysteresis provides superior noise rejection in electrically noisy environments. Substitutes with 300mV hysteresis (SP3223 series) maintain RS232 compliance but offer reduced noise margin. For applications in clean electrical environments or with properly terminated RS232 lines, 300mV hysteresis is acceptable. For noise-sensitive applications, maintain 500mV hysteresis by selecting MAX3223ECUP+, MAX3224ECUP+, or MAX3225ECUP+.

Q: Can I use parts with extended temperature ranges (-40°C to 85°C) in place of 0°C to 70°C parts? A: Yes. Extended temperature range parts (SP3223EBEY-L/TR and SP3223EEY-L) are fully backward-compatible with applications specified for 0°C to 70°C operation. The extended range provides additional design margin and is suitable for industrial, automotive, and outdoor applications. No circuit modifications are required.

Q: What is the significance of RoHS compliance status differences? A: All listed parts maintain RoHS3 compliance or equivalent RoHS compliance, indicating lead-free construction and compliance with hazardous substance restrictions. Parts marked "ROHS3 Compliant" and "RoHS Compliant" are functionally equivalent from a regulatory standpoint. Selection should be based on supply chain requirements and customer specifications.

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