SN75C3232EDB RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SN75C3232EDB is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SSOP package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The SN75C3232EDB operates across a 3V to 5.5V supply range with a 1Mbps data rate and is suitable for surface mount applications requiring RS232 serial communication interfaces.

Key Parameters

Parameter	SN75C3232EDB
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	1Mbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	16-SSOP (0.209", 5.30mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN75C3232EDB is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage Supply Range: 3V ~ 5.5V (minimum overlap required)
Mounting Type: Surface Mount
Package Type: 16-SSOP or 16-TSSOP (both acceptable for pin-compatible layouts)

Secondary Considerations:

Data Rate: Minimum 1Mbps required (substitute parts at 250kbps are functional but operate at reduced bandwidth)
Receiver Hysteresis: 300 mV or 500 mV (both acceptable for RS232 threshold detection)
Operating Temperature Range: Extended range (-40°C ~ 85°C) provides broader application coverage than the original 0°C ~ 70°C
Product Status: Active status ensures ongoing availability and support

The substitute parts listed below maintain full functional compatibility with the SN75C3232EDB while offering improved availability and extended operating specifications.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Hysteresis	Supply Voltage	Temp Range	Package	Status	MSL
SN75C3232EDB	Texas Instruments	RS232	2/2	1Mbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Obsolete	1
SN65C3232EDBR	Texas Instruments	RS232	2/2	1Mbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	1
ICL3232CVZ	Renesas Electronics	RS232	2/2	250kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Active	3
ICL3232CVZ-T	Renesas Electronics	RS232	2/2	250kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Active	3
ICL3232ECAZ	Renesas Electronics	RS232	2/2	250kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	3
ICL3232ECAZ-T	Renesas Electronics	RS232	2/2	250kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	3
ICL3232ECV-16Z	Renesas Electronics	RS232	2/2	250kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Active	3
ICL3232EIAZ	Renesas Electronics	RS232	2/2	250kbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	3
ICL3232EIAZ-T	Renesas Electronics	RS232	2/2	250kbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	3
ICL3232EIV-16Z	Renesas Electronics	RS232	2/2	250kbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active	3
ICL3232IVZ	Renesas Electronics	RS232	2/2	250kbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active	3

Engineering Selection Recommendations

Primary Recommendation: SN65C3232EDBR

The SN65C3232EDBR is the direct Texas Instruments equivalent with active product status. It maintains identical electrical specifications to the SN75C3232EDB (1Mbps data rate, 300 mV hysteresis, 16-SSOP package) while extending the operating temperature range to -40°C ~ 85°C. Both parts are ROHS3 compliant with MSL 1 rating. This part provides the highest compatibility with existing designs and documentation.

Secondary Recommendation: ICL3232EIAZ or ICL3232EIAZ-T

The Renesas ICL3232EIAZ series offers active product status with extended temperature range (-40°C ~ 85°C) and 16-SSOP package compatibility. The data rate specification of 250kbps is lower than the original 1Mbps, but remains suitable for standard RS232 serial communication applications. The 500 mV receiver hysteresis provides improved noise immunity. MSL 3 rating requires controlled storage conditions (168 hours at 85°C/85% RH).

Package Consideration: 16-TSSOP Variants

Renesas ICL3232 parts in 16-TSSOP package (0.173" width) are pin-compatible alternatives to 16-SSOP (0.209" width) for applications where PCB layout permits the narrower package footprint. These include ICL3232CVZ-T, ICL3232ECV-16Z, ICL3232EIV-16Z, and ICL3232IVZ.

Compliance Status

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original SN75C3232EDB specifications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN75C3232EDB with SN65C3232EDBR?

A: Yes. Both parts are Texas Instruments RS232 2/2 transceivers in 16-SSOP packages with identical electrical specifications (1Mbps, 300 mV hysteresis, 3V ~ 5.5V supply). The SN65C3232EDBR has active product status and extended temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C).

Q: What is the difference between 16-SSOP and 16-TSSOP packages?

A: Both are 16-pin surface mount packages with identical pin assignments. The 16-SSOP has a 0.209" body width, while 16-TSSOP has a 0.173" body width. They are pin-compatible; the narrower TSSOP package requires verification of PCB layout clearances.

Q: Why do Renesas ICL3232 parts have lower data rates (250kbps vs. 1Mbps)?

A: The 250kbps specification reflects the maximum guaranteed data rate for those parts. Standard RS232 applications typically operate at 9600 baud to 115200 baud, well below both specifications. The lower rated speed does not prevent operation at higher baud rates in practical applications.

Q: What does MSL 3 (168 Hours) mean for ICL3232 parts?

A: Moisture Sensitivity Level 3 requires that parts be stored in controlled conditions (≤30% relative humidity at 25°C) or in dry-pack with desiccant. Parts must be used within 168 hours of opening the moisture barrier. MSL 1 (SN75C3232EDB and SN65C3232EDBR) has unlimited shelf life without moisture control.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the original SN75C3232EDB.

Q: Which substitute offers the best temperature range coverage?

A: Renesas ICL3232 parts with extended temperature range (-40°C ~ 85°C) include ICL3232EIAZ, ICL3232EIAZ-T, ICL3232EIV-16Z, and ICL3232IVZ. These are suitable for industrial and automotive applications requiring broader temperature operation.

Q: Can I use ICL3232 parts as drop-in replacements?

A: ICL3232 parts are functionally compatible but require attention to package type (16-SSOP vs. 16-TSSOP) and moisture sensitivity level (MSL 3 vs. MSL 1). Verify PCB layout compatibility and implement appropriate moisture handling procedures for MSL 3 parts.

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