SN75C3232EDR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SN75C3232EDR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 16-SOIC 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 1 Mbps data rate and 300 mV receiver hysteresis, suitable for legacy serial communication applications requiring full RS232 protocol compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN75C3232EDR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	1 Mbps
Voltage Supply Range	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Receiver Hysteresis	300 mV
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SN75C3232EDR is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

RS232 protocol compliance
2/2 driver/receiver configuration
Full-duplex operation
16-SOIC package footprint (0.154", 3.90mm width)
Surface mount mounting type
3V ~ 5.5V supply voltage compatibility
ROHS3 compliance

Acceptable Variation Parameters:

Data rate: Substitute parts may operate at 250 kbps or higher (1 Mbps minimum preferred)
Operating temperature range: Substitutes with extended ranges (-40°C ~ 85°C) are acceptable for 0°C ~ 70°C applications
Receiver hysteresis: 300 mV or 500 mV are both acceptable
Packaging format: Cut Tape (CT), Digi-Reel, or Tube formats are interchangeable
Moisture sensitivity level: MSL 1, 2, or 3 are acceptable

Substitutes are grouped by manufacturer and product status to facilitate selection based on availability and supply chain requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Operating Temp	Receiver Hysteresis	Packaging	MSL
SN75C3232EDR	Texas Instruments	Obsolete	1 Mbps	0°C ~ 70°C	300 mV	Cut Tape (CT) & Digi-Reel	1
SN65C3232EDR	Texas Instruments	Active	1 Mbps	-40°C ~ 85°C	300 mV	Cut Tape (CT) & Digi-Reel	1
SN75C3232DR	Texas Instruments	Active	1 Mbps	0°C ~ 70°C	300 mV	Tape & Reel (TR)	1
TRSF3232ECDR	Texas Instruments	Active	1 Mbps	0°C ~ 70°C	300 mV	Cut Tape (CT) & Digi-Reel	1
SP3232EUCN-L	MaxLinear, Inc.	Active	1 Mbps	0°C ~ 70°C	300 mV	Tube	2
ICL3232CBNZ	Renesas Electronics	Active	250 kbps	0°C ~ 70°C	300 mV	Tube	3
ICL3232CBNZ-T	Renesas Electronics	Active	250 kbps	0°C ~ 70°C	300 mV	Cut Tape (CT) & Digi-Reel	3
ICL3232ECBNZ	Renesas Electronics	Active	250 kbps	0°C ~ 70°C	500 mV	Tube	3
ICL3232ECBNZ-T	Renesas Electronics	Active	250 kbps	0°C ~ 70°C	500 mV	Cut Tape (CT) & Digi-Reel	3
ICL3232EIBNZ	Renesas Electronics	Active	250 kbps	-40°C ~ 85°C	500 mV	Tube	3
ICL3232EIBNZ-T	Renesas Electronics	Active	250 kbps	-40°C ~ 85°C	500 mV	Cut Tape (CT) & Digi-Reel	3

Engineering Selection Recommendations

Texas Instruments Direct Substitutes (Preferred for Pin-Compatible Replacement):

SN65C3232EDR is the primary direct substitute, offering active product status with extended operating temperature range (-40°C ~ 85°C) while maintaining identical electrical specifications and 1 Mbps data rate. This part is suitable for applications requiring superior temperature performance without design modification.

SN75C3232DR provides parametric equivalence with identical operating temperature range (0°C ~ 70°C) and electrical characteristics as the original part, differentiated only by Tape & Reel packaging format. This option is appropriate when packaging format change is acceptable.

TRSF3232ECDR maintains full electrical and thermal equivalence with active product status and Cut Tape & Digi-Reel packaging, providing direct functional replacement.

MaxLinear Alternative:

SP3232EUCN-L offers active product status with identical electrical specifications and 1 Mbps data rate. Moisture sensitivity level increases to MSL 2 (1 Year), requiring appropriate handling procedures. Tube packaging format differs from the original Cut Tape & Digi-Reel option.

Renesas Electronics Options (Extended Temperature or Enhanced Hysteresis):

ICL3232CBNZ and ICL3232CBNZ-T provide active product status with 250 kbps data rate (lower than original 1 Mbps) and identical 300 mV receiver hysteresis. These parts are suitable for applications where 250 kbps bandwidth is sufficient. MSL 3 (168 Hours) requires controlled storage conditions.

ICL3232ECBNZ and ICL3232ECBNZ-T offer enhanced receiver hysteresis (500 mV) with 250 kbps data rate and active product status, beneficial for noisy signal environments. Available in both Tube and Cut Tape & Digi-Reel formats.

ICL3232EIBNZ and ICL3232EIBNZ-T extend operating temperature to -40°C ~ 85°C with 500 mV receiver hysteresis and 250 kbps data rate, suitable for industrial temperature range applications. Cut Tape & Digi-Reel format (ICL3232EIBNZ-T) offers highest inventory availability at 35,200 pieces.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower data rate (250 kbps) in place of the 1 Mbps SN75C3232EDR?

A: Yes, if your application operates at or below 250 kbps. The Renesas ICL3232 series parts operate at 250 kbps and are electrically compatible. Verify your actual communication speed requirements before substitution.

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

A: Receiver hysteresis determines the voltage difference between logic high and low thresholds. Higher hysteresis (500 mV) provides greater noise immunity in electrically noisy environments but requires larger signal swings. Both values are acceptable for RS232 protocol compliance.

Q: Are the different packaging formats (Cut Tape, Digi-Reel, Tube, Tape & Reel) electrically equivalent?

A: Yes. Packaging format differences affect only handling, storage, and assembly processes. The electrical and functional specifications remain identical. Select based on your assembly equipment and supply chain requirements.

Q: What does MSL (Moisture Sensitivity Level) mean, and does it affect part selection?

A: MSL indicates how long a component can be exposed to ambient humidity before soldering. MSL 1 (Unlimited) allows indefinite storage. MSL 2 (1 Year) and MSL 3 (168 Hours) require controlled storage conditions. Higher MSL parts require baking before reflow soldering if storage limits are exceeded. Select based on your inventory management and assembly procedures.

Q: Is the extended temperature range (-40°C ~ 85°C) of SN65C3232EDR and ICL3232EIBNZ compatible with my 0°C ~ 70°C application?

A: Yes. Extended temperature range parts are backward compatible with narrower temperature applications. Use extended range parts when available for improved design margin and supply flexibility.

Q: Can I substitute the SN75C3232EDR with any of these parts without PCB redesign?

A: All substitute parts use the identical 16-SOIC package footprint (0.154", 3.90mm width) and pin configuration. No PCB redesign is required. Verify pinout compatibility in device datasheets before assembly.

Q: Which substitute offers the best availability?

A: ICL3232EIBNZ-T (Renesas) offers the highest inventory at 35,200 pieces, followed by ICL3232ECBNZ-T at 17,795 pieces. Both are active products in Cut Tape & Digi-Reel format.

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