SN65C3232DWR Equivalent & Substitute Parts

Part Overview

The SN65C3232DWR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SOIC surface mount package. This interface IC operates across a 3V to 5.5V supply range with a 1Mbps data rate and 300mV receiver hysteresis, designed for serial communication applications requiring full RS232 protocol compliance. The part is currently in Last Time Buy status, making equivalent and substitute parts essential for ongoing design support and production continuity.

Key Parameters

Parameter	SN65C3232DWR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Receiver Hysteresis	300 mV
Voltage Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN65C3232DWR is determined by the following critical parameters:

Primary Substitution Criteria:

Protocol: RS232 full-duplex transceiver
Configuration: 2/2 drivers and receivers
Package: 16-SOIC surface mount
Voltage Supply: 3V ~ 5.5V compatibility
Data Rate: Minimum 1Mbps capability
Receiver Hysteresis: 300mV or higher
Operating Temperature: Support for -40°C ~ 85°C range
Compliance: ROHS3 and REACH requirements

Substitute parts are grouped into two categories based on parametric alignment:

Category 1: Full Parametric Equivalents — Parts matching all electrical specifications including 1Mbps data rate and 300mV hysteresis across the extended temperature range (-40°C ~ 85°C).

Category 2: Functional Equivalents — Parts meeting core RS232 2/2 transceiver requirements with compatible supply voltage and package, but with variations in data rate, hysteresis, or operating temperature range.

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Operating Temp	Package Width	Product Status	Inventory
SN65C3232DWR	Texas Instruments	1Mbps	300 mV	-40°C ~ 85°C	7.50mm	Last Time Buy	5520 Pcs
TRSF3232EIDR	Texas Instruments	1Mbps	300 mV	-40°C ~ 85°C	3.90mm	Active	3493 Pcs
TRSF3232EIDWR	Texas Instruments	1Mbps	300 mV	-40°C ~ 85°C	7.50mm	Last Time Buy	1444 Pcs
MAX3232EEWE+	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	-40°C ~ 85°C	7.50mm	Active	787 Pcs
MAX3232EEWE+T	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	-40°C ~ 85°C	7.50mm	Active	2608 Pcs
ICL3232ECBZ	Renesas Electronics Corporation	250kbps	500 mV	0°C ~ 70°C	7.50mm	Active	2125 Pcs
ICL3232ECBZ-T	Renesas Electronics Corporation	250kbps	500 mV	0°C ~ 70°C	7.50mm	Active	1124 Pcs
MAX3232CWE+	Analog Devices Inc./Maxim Integrated	235Kbps	300 mV	0°C ~ 70°C	7.50mm	Active	2540 Pcs
MAX3232CWE+T	Analog Devices Inc./Maxim Integrated	235Kbps	300 mV	0°C ~ 70°C	7.50mm	Active	5384 Pcs
MAX3232ECWE+	Analog Devices Inc./Maxim Integrated	1Mbps	500 mV	0°C ~ 70°C	7.50mm	Active	2258 Pcs
MAX3232ECWE+T	Analog Devices Inc./Maxim Integrated	1Mbps	500 mV	0°C ~ 70°C	7.50mm	Active	2136 Pcs

Engineering Selection Recommendations

Tier 1 — Direct Replacement (Identical Electrical Performance)

TRSF3232EIDR and TRSF3232EIDWR from Texas Instruments maintain full parametric equivalence with the SN65C3232DWR across all electrical specifications: 1Mbps data rate, 300mV receiver hysteresis, and -40°C to 85°C operating range. Both parts are ROHS3 compliant and MSL 1 rated. TRSF3232EIDWR matches the original 7.50mm package width. TRSF3232EIDR uses a narrower 3.90mm package but maintains identical electrical performance. Both parts are currently in Active product status, ensuring long-term availability.

Tier 2 — Functional Equivalents with Extended Availability

MAX3232EEWE+ and MAX3232EEWE+T from Analog Devices Inc./Maxim Integrated provide RS232 2/2 transceiver functionality with extended temperature support (-40°C to 85°C) and 7.50mm package compatibility. These parts operate at 250kbps data rate with 500mV receiver hysteresis. Both are ROHS3 compliant and MSL 1 rated. The +T variant uses Cut Tape & Digi-Reel packaging with higher inventory availability (2608 Pcs).

Tier 3 — Commercial Temperature Range Alternatives

MAX3232CWE+, MAX3232CWE+T, MAX3232ECWE+, and MAX3232ECWE+T are suitable for applications operating within 0°C to 70°C. MAX3232CWE variants offer 235Kbps data rate with 300mV hysteresis matching the original receiver threshold. MAX3232ECWE variants support 1Mbps data rate with 500mV hysteresis. All are ROHS3 compliant and MSL 1 rated. The +T variants provide higher inventory levels and Cut Tape packaging.

ICL3232ECBZ and ICL3232ECBZ-T from Renesas Electronics Corporation are restricted to 0°C to 70°C operation with MSL 3 rating (168 Hours), limiting suitability for extended temperature or high-humidity storage applications.

Frequently Asked Questions (FAQ)

Q: Can TRSF3232EIDR replace SN65C3232DWR in existing designs?

A: Yes. TRSF3232EIDR is a direct parametric equivalent with identical electrical specifications (1Mbps, 300mV hysteresis, -40°C to 85°C). The primary difference is package width (3.90mm vs. 7.50mm). PCB layout compatibility must be verified before substitution.

Q: What is the difference between MAX3232EEWE+ and MAX3232ECWE+?

A: MAX3232EEWE+ operates at 250kbps with 500mV receiver hysteresis. MAX3232ECWE+ operates at 1Mbps with 500mV receiver hysteresis. Both support -40°C to 85°C operation. Selection depends on required data rate for the application.

Q: Are ICL3232ECBZ parts suitable for industrial temperature applications?

A: No. ICL3232ECBZ and ICL3232ECBZ-T are rated for 0°C to 70°C operation only, making them unsuitable for applications requiring -40°C to 85°C support. Additionally, MSL 3 rating (168 Hours) imposes moisture sensitivity constraints not present in MSL 1 parts.

Q: What packaging options are available for active substitutes?

A: TRSF3232EIDR is available in Cut Tape & Digi-Reel packaging (3.90mm width). TRSF3232EIDWR is available in Cut Tape & Digi-Reel packaging (7.50mm width, matching original). MAX3232 variants are available in both Tube and Cut Tape & Digi-Reel formats. ICL3232ECBZ is available in Tube; ICL3232ECBZ-T is available in Tape & Reel.

Q: Which substitute offers the highest inventory availability?

A: MAX3232CWE+T provides the highest inventory at 5384 Pcs. This part is suitable for applications operating within 0°C to 70°C with 235Kbps data rate requirements.

Q: Do all substitute parts meet ROHS3 and REACH compliance?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the original SN65C3232DWR compliance status.

Q: What is the significance of the +T suffix in part numbers?

A: The +T suffix indicates Cut Tape & Digi-Reel packaging format, typically offering higher inventory availability and automated handling compatibility compared to Tube packaging.

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