SN65C3232DW Equivalent & Substitute Parts

Part Overview

The SN65C3232DW is a 2/2 transceiver full RS232 interface IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component operates across a 3V to 5.5V supply voltage range with a 1Mbps data rate and 300mV receiver hysteresis, supporting full-duplex RS232 communication. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain flexibility for applications requiring RS232 transceiver functionality.

Key Parameters

Parameter	SN65C3232DW
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Receiver Hysteresis	300mV
Supply Voltage	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 SN65C3232DW is determined by strict alignment of the following electrical and mechanical parameters:

Protocol: RS232 full-duplex transceiver with 2 drivers and 2 receivers
Supply Voltage: 3V to 5.5V operating range
Package: 16-SOIC surface mount configuration
Data Rate: Minimum 1Mbps capability
Receiver Hysteresis: 300mV or 500mV (both acceptable for RS232 applications)
Operating Temperature: Extended range (-40°C to 85°C) preferred; commercial range (0°C to 70°C) acceptable with application review
RoHS3 Compliance: Required for regulatory alignment

Substitute parts are grouped into two categories based on data rate and temperature specifications:

Group A (Full Specification Match): Parts meeting or exceeding all SN65C3232DW parameters, including 1Mbps data rate and -40°C to 85°C operating range.

Group B (Acceptable Substitutes): Parts with reduced data rate (235Kbps–250Kbps) or narrower operating temperature range (0°C to 70°C), suitable for applications not requiring extended temperature or maximum data rate performance.

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Operating Temperature	Package Width	Product Status	Inventory (Pcs)
SN65C3232DW	Texas Instruments	1Mbps	300mV	-40°C ~ 85°C	7.50mm	Last Time Buy	12800
TRSF3232EIDR	Texas Instruments	1Mbps	300mV	-40°C ~ 85°C	3.90mm	Active	3493
MAX3232ECWE+	Analog Devices Inc./Maxim Integrated	1Mbps	500mV	0°C ~ 70°C	7.50mm	Active	2258
MAX3232ECWE+T	Analog Devices Inc./Maxim Integrated	1Mbps	500mV	0°C ~ 70°C	7.50mm	Active	2136
MAX3232EWE+	Analog Devices Inc./Maxim Integrated	235Kbps	300mV	-40°C ~ 85°C	7.50mm	Active	3100
MAX3232CWE+	Analog Devices Inc./Maxim Integrated	235Kbps	300mV	0°C ~ 70°C	7.50mm	Active	2540
MAX3232CWE+T	Analog Devices Inc./Maxim Integrated	235Kbps	300mV	0°C ~ 70°C	7.50mm	Active	5384
MAX3232EEWE+	Analog Devices Inc./Maxim Integrated	250Kbps	500mV	-40°C ~ 85°C	7.50mm	Active	787
MAX3232EEWE+T	Analog Devices Inc./Maxim Integrated	250Kbps	500mV	-40°C ~ 85°C	7.50mm	Active	2608
ICL3232ECBZ	Renesas Electronics Corporation	250Kbps	500mV	0°C ~ 70°C	7.50mm	Active	2125
ICL3232ECBZ-T	Renesas Electronics Corporation	250Kbps	500mV	0°C ~ 70°C	7.50mm	Active	1124

Engineering Selection Recommendations

Primary Substitute (Recommended for Direct Replacement):

TRSF3232EIDR from Texas Instruments is the manufacturer-recommended substitute. It maintains identical electrical specifications (1Mbps data rate, 300mV receiver hysteresis, -40°C to 85°C operating range) and supply voltage compatibility. The only difference is package width (3.90mm versus 7.50mm), which requires PCB layout verification but does not affect electrical function. Active product status ensures long-term availability.

Secondary Substitutes (Conditional Compatibility):

MAX3232ECWE+ and MAX3232ECWE+T from Analog Devices Inc./Maxim Integrated support 1Mbps data rate with extended receiver hysteresis (500mV) and narrower operating temperature range (0°C to 70°C). These are suitable for applications operating within commercial temperature limits and where increased hysteresis does not compromise signal integrity.

MAX3232EWE+ and MAX3232CWE+ series offer 235Kbps data rate with 300mV receiver hysteresis. MAX3232EWE+ maintains extended temperature range (-40°C to 85°C), while MAX3232CWE+ operates within commercial range (0°C to 70°C). These are appropriate for applications not requiring 1Mbps throughput.

ICL3232ECBZ and ICL3232ECBZ-T from Renesas Electronics Corporation provide 250Kbps data rate with 500mV receiver hysteresis and commercial operating temperature range (0°C to 70°C). These are suitable for lower-speed RS232 applications within standard industrial temperature limits.

All substitute parts maintain ROHS3 compliance and identical 16-SOIC package footprint (7.50mm width, except TRSF3232EIDR), ensuring regulatory alignment and mechanical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can TRSF3232EIDR replace SN65C3232DW directly on the PCB?

A: TRSF3232EIDR is electrically identical to SN65C3232DW and pin-compatible. However, the package width differs (3.90mm versus 7.50mm). PCB layout must be reviewed to confirm the narrower package fits within the existing footprint. If the original footprint accommodates the narrower width, direct substitution is possible without design changes.

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

A: Receiver hysteresis defines the voltage difference between logic high and low thresholds. Higher hysteresis (500mV) provides greater noise immunity but may reduce sensitivity to weak signals. For standard RS232 applications with adequate signal levels, both values are functionally equivalent. Application-specific signal integrity analysis is required if operating near threshold margins.

Q: Can I use MAX3232 variants with reduced data rates (235Kbps–250Kbps) in place of the 1Mbps SN65C3232DW?

A: Substitution is valid only if the application's actual data rate requirement does not exceed the substitute part's maximum specification. If the design operates at 115.2Kbps or lower (common in legacy RS232 systems), MAX3232 variants with 235Kbps or 250Kbps ratings are functionally adequate. If the application requires 1Mbps throughput, reduced-rate substitutes are not suitable.

Q: Are there temperature range restrictions when substituting with commercial-grade parts?

A: Parts rated for 0°C to 70°C operating range are suitable for applications within this temperature envelope. If the original design requires extended temperature operation (-40°C to 85°C), commercial-grade substitutes must not be used unless the application environment is confirmed to remain within 0°C to 70°C limits. Extended-temperature variants (such as MAX3232EWE+) are required for full temperature range compatibility.

Q: What packaging options are available for these RS232 transceiver substitutes?

A: All listed substitutes are available in 16-SOIC surface mount packages with 7.50mm width, except TRSF3232EIDR (3.90mm width). Packaging variants include Tube, Cut Tape (CT) & Digi-Reel®, and Tape & Reel (TR) configurations. Selection depends on procurement volume and assembly process requirements. Electrical function is identical across all packaging options for a given part number.

Q: Is MSL (Moisture Sensitivity Level) a factor in selecting substitutes?

A: SN65C3232DW carries MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Most substitute parts also carry MSL 1, except ICL3232ECBZ and ICL3232ECBZ-T (MSL 3, 168 Hours). For high-volume or extended storage applications, MSL 1 parts are preferred. MSL 3 parts require controlled storage conditions and bake-out procedures before reflow soldering.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message