SN75C3232D RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SN75C3232D is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The SN75C3232D operates across a 3V to 5.5V supply range with a 1 Mbps data rate and 300 mV receiver hysteresis, designed for serial communication applications requiring RS232 protocol compliance.

Key Parameters

Parameter	SN75C3232D
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	1 Mbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the SN75C3232D is determined by the following critical parameters:

Core Compatibility Requirements:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage Supply Range: 3V ~ 5.5V (minimum overlap required)
Package / Case: 16-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Secondary Compatibility Parameters:

Receiver Hysteresis: 300 mV or 500 mV (both acceptable for RS232 applications)
Data Rate: 250 kbps or higher (SN75C3232D operates at 1 Mbps; substitutes at 250 kbps are functionally compatible for lower-speed applications)
Operating Temperature: Extended range (-40°C ~ 85°C) is compatible with standard range (0°C ~ 70°C)

Compliance Requirements:

RoHS3 Compliant
REACH Unaffected
ECCN: EAR99

All substitute parts listed meet these core requirements and are classified as active products, ensuring long-term availability and supply chain stability.

Parameter Comparison

Part Number	Manufacturer	Product Status	Receiver Hysteresis	Data Rate	Operating Temperature	Packaging	Inventory (Pcs)
SN75C3232D	Texas Instruments	Obsolete	300 mV	1 Mbps	0°C ~ 70°C	16-SOIC	801
ICL3232CBNZ	Renesas Electronics	Active	300 mV	250 kbps	0°C ~ 70°C	Tube	9,884
ICL3232CBNZ-T	Renesas Electronics	Active	300 mV	250 kbps	0°C ~ 70°C	Cut Tape & Digi-Reel	1,321
ICL3232ECBNZ	Renesas Electronics	Active	500 mV	250 kbps	0°C ~ 70°C	Tube	2,342
ICL3232ECBNZ-T	Renesas Electronics	Active	500 mV	250 kbps	0°C ~ 70°C	Cut Tape & Digi-Reel	17,795
SP3232EBCN-L	MaxLinear, Inc.	Active	300 mV	250 kbps	0°C ~ 70°C	Tube	1,306
SP3232EBCN-L/TR	MaxLinear, Inc.	Active	300 mV	250 kbps	0°C ~ 70°C	Tape & Reel	30,300
ST3232ECDR	STMicroelectronics	Active	500 mV	250 kbps	0°C ~ 70°C	Cut Tape & Digi-Reel	24,020
ICL3232EIBNZ	Renesas Electronics	Active	500 mV	250 kbps	-40°C ~ 85°C	Tube	2,063
ICL3232EIBNZ-T	Renesas Electronics	Active	500 mV	250 kbps	-40°C ~ 85°C	Cut Tape & Digi-Reel	35,200
ICL3232IBNZ	Renesas Electronics	Active	300 mV	250 kbps	-40°C ~ 85°C	Tube	1,364

Engineering Selection Recommendations

Primary Selection Criteria:

All listed substitute parts are active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance and supply chain continuity. Selection should prioritize active product status over the obsolete SN75C3232D.

Receiver Hysteresis Matching:

For applications requiring 300 mV hysteresis: ICL3232CBNZ, ICL3232CBNZ-T, SP3232EBCN-L, SP3232EBCN-L/TR, or ICL3232IBNZ
For applications tolerant of 500 mV hysteresis: ICL3232ECBNZ, ICL3232ECBNZ-T, ST3232ECDR, ICL3232EIBNZ, or ICL3232EIBNZ-T

Operating Temperature Considerations:

Standard temperature range (0°C ~ 70°C): All parts except ICL3232EIBNZ, ICL3232EIBNZ-T, and ICL3232IBNZ
Extended temperature range (-40°C ~ 85°C): ICL3232EIBNZ, ICL3232EIBNZ-T, and ICL3232IBNZ for applications requiring wider thermal operation

Packaging and Supply Chain:

Tape & Reel packaging (SP3232EBCN-L/TR, ICL3232CBNZ-T, ICL3232ECBNZ-T, ST3232ECDR, ICL3232EIBNZ-T) offers higher inventory availability and is preferred for high-volume production
Tube packaging provides alternative sourcing options with adequate stock levels

Manufacturer Diversity:

Renesas Electronics (ICL3232 series): Largest inventory across multiple variants
MaxLinear, Inc. (SP3232 series): Established alternative with strong availability
STMicroelectronics (ST3232 series): Additional sourcing option for 500 mV hysteresis applications

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with 500 mV receiver hysteresis instead of the original 300 mV specification?

A: Yes. Both 300 mV and 500 mV receiver hysteresis values are acceptable for RS232 transceiver applications. The 500 mV hysteresis provides increased noise immunity and is functionally compatible with standard RS232 protocol requirements.

Q: Are the 250 kbps substitute parts compatible with the original 1 Mbps SN75C3232D?

A: The substitute parts operate at 250 kbps maximum data rate, which is lower than the original 1 Mbps specification. These parts are compatible with applications operating at or below 250 kbps. For applications requiring 1 Mbps operation, verify that the lower data rate does not impact system performance requirements.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is suitable for lower-volume applications and manual assembly. Tape & Reel packaging is designed for automated pick-and-place assembly and is standard for high-volume production. Both packaging formats contain identical components; the difference is in handling and assembly methodology.

Q: Why do some parts have extended operating temperature ranges (-40°C ~ 85°C)?

A: Extended temperature range variants (ICL3232EIBNZ, ICL3232EIBNZ-T, ICL3232IBNZ) are qualified for industrial and automotive applications requiring operation beyond standard commercial temperature limits (0°C ~ 70°C). Use extended range parts only if your application requires this capability, as they may have different pricing and lead times.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all parts meet your specific application requirements for receiver hysteresis, data rate, operating temperature, and packaging. Ensure that component selection is documented for traceability and supply chain management.

Q: What is the recommended substitute if I need the closest match to the original SN75C3232D?

A: ICL3232IBNZ or ICL3232IBNZ-T (Renesas Electronics) provide the closest functional match with 300 mV receiver hysteresis, extended operating temperature range (-40°C ~ 85°C), and active product status. These parts are manufacturer-recommended alternatives with high inventory availability.

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