TRSF3232ECDWR RS232 Transceiver Interface IC

Part Overview

The TRSF3232ECDWR is a 2/2 full-duplex RS232 transceiver interface IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This component operates across a 3V to 5.5V supply voltage range with a 1Mbps data rate capability and 300mV receiver hysteresis. The part is currently in Last Time Buy status with 9,787 units in stock. Due to its Last Time Buy classification, identifying equivalent and substitute parts is necessary for long-term design continuity and supply chain planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRSF3232ECDWR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Receiver Hysteresis	300mV
Voltage Supply Range	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TRSF3232ECDWR is determined by the following critical parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Package / Case: 16-SOIC (0.295", 7.50mm Width)
Voltage Supply Range: 3V ~ 5.5V
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Substitute parts must maintain compatibility across these core electrical and mechanical specifications. Secondary parameters including data rate, receiver hysteresis, operating temperature range, and product status are noted for application-specific evaluation but do not disqualify substitution when primary parameters align.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Receiver Hysteresis	Voltage Supply	Operating Temp	Package	Product Status	Inventory
TRSF3232ECDWR	Texas Instruments	RS232	2/2	1Mbps	300mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Last Time Buy	9,787
MAX3232ECDWR	Texas Instruments	RS232	2/2	250kbps	300mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	2,260
SN75C3232DWR	Texas Instruments	RS232	2/2	1Mbps	300mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Last Time Buy	5,839
SN75C3232EDWR	Texas Instruments	RS232	2/2	1Mbps	300mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Last Time Buy	6,500
MAX3232ECWE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	1Mbps	500mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	2,258
MAX3232ECWE+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	1Mbps	500mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	2,136
ICL3232ECBZ	Renesas Electronics Corporation	RS232	2/2	250kbps	500mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	2,125
ICL3232ECBZ-T	Renesas Electronics Corporation	RS232	2/2	250kbps	500mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	1,124
MAX3232CWE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	235Kbps	300mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	2,540
MAX3232CWE+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	235Kbps	300mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	5,384
MAX3232EWE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	235Kbps	300mV	3V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active	3,100

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and EAR99 classification consistent with the TRSF3232ECDWR. Selection among substitutes should prioritize parts with Active product status to ensure long-term availability and manufacturing support.

For applications requiring 1Mbps data rate performance matching the original specification, SN75C3232DWR and SN75C3232EDWR from Texas Instruments provide parametric equivalence. Both maintain Last Time Buy status similar to the TRSF3232ECDWR.

For new designs or applications with extended supply chain requirements, MAX3232ECWE+ and MAX3232ECWE+T from Analog Devices Inc./Maxim Integrated offer Active product status with 1Mbps data rate capability. These parts feature 500mV receiver hysteresis compared to the original 300mV specification.

MAX3232CWE+, MAX3232CWE+T, and MAX3232EWE+ provide Active alternatives with reduced data rate (235Kbps) and 300mV receiver hysteresis matching the original part. MAX3232EWE+ extends the operating temperature range to -40°C ~ 85°C for applications requiring wider temperature performance.

ICL3232ECBZ and ICL3232ECBZ-T from Renesas Electronics Corporation maintain Active status with 250kbps data rate and 500mV receiver hysteresis. These parts carry MSL 3 (168 Hours) moisture sensitivity compared to MSL 1 (Unlimited) of the original part.

Frequently Asked Questions (FAQ)

Q: Can I substitute the TRSF3232ECDWR with any of the listed parts without circuit modification?

A: All listed parts maintain the same 16-SOIC package, 2/2 driver/receiver configuration, full-duplex RS232 protocol, and 3V to 5.5V supply voltage range. Pin-to-pin compatibility is maintained across all substitutes. However, application-specific performance requirements such as data rate and operating temperature must be verified against your design specifications.

Q: What is the difference between parts with different data rates?

A: The TRSF3232ECDWR operates at 1Mbps. Substitute parts are available at 1Mbps (SN75C3232DWR, SN75C3232EDWR, MAX3232ECWE+, MAX3232ECWE+T), 250kbps (MAX3232ECDWR, ICL3232ECBZ, ICL3232ECBZ-T), and 235Kbps (MAX3232CWE+, MAX3232CWE+T, MAX3232EWE+). Selection depends on your application's communication speed requirements.

Q: Why do some parts have different receiver hysteresis values?

A: Receiver hysteresis affects input threshold characteristics. The TRSF3232ECDWR specifies 300mV hysteresis. Substitutes with 500mV hysteresis (MAX3232ECWE+, MAX3232ECWE+T, ICL3232ECBZ, ICL3232ECBZ-T) provide increased noise immunity but may affect signal detection sensitivity. Parts with 300mV hysteresis (MAX3232ECDWR, MAX3232CWE+, MAX3232CWE+T, MAX3232EWE+) maintain closer specification alignment.

Q: What is the significance of product status (Active vs. Last Time Buy)?

A: Active status indicates ongoing manufacturing and long-term availability. Last Time Buy status indicates the manufacturer will discontinue production. For new designs or long-term production requirements, Active status parts are recommended to ensure sustained supply chain support.

Q: Are there packaging differences among the substitutes?

A: The TRSF3232ECDWR is supplied in Tape & Reel (TR) packaging. Substitute parts are available in multiple packaging options: Cut Tape (CT) & Digi-Reel®, Tube, and Tape & Reel (TR). Packaging selection depends on your procurement and assembly requirements but does not affect electrical performance.

Q: What is the moisture sensitivity level (MSL) difference?

A: The TRSF3232ECDWR carries MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. ICL3232ECBZ and ICL3232ECBZ-T carry MSL 3 (168 Hours), requiring controlled storage and handling conditions. All other substitutes maintain MSL 1 classification.

Q: Can I use MAX3232EWE+ in applications requiring 0°C to 70°C operation?

A: MAX3232EWE+ is rated for -40°C to 85°C operation, which encompasses the 0°C to 70°C range. This part is suitable for applications within the original temperature specification and provides extended performance for wider temperature environments.

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