SN75C3232PW RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SN75C3232PW is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-TSSOP 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 1Mbps data rate and 300mV receiver hysteresis, suitable for legacy serial communication applications requiring full RS232 protocol compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN75C3232PW
Manufacturer	Texas Instruments
Product Status	Obsolete
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SN75C3232PW is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage Supply Range: 3V ~ 5.5V
Package Type: 16-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount

Allowable Variations:

Data Rate: Substitute parts may operate at 250kbps, 460kbps, or 1Mbps (all support the original 1Mbps requirement or operate at lower rates compatible with legacy systems)
Operating Temperature: Substitute parts with extended temperature ranges (-40°C ~ 85°C) are acceptable for applications within the original 0°C ~ 70°C window
Receiver Hysteresis: Variations between 300mV and 500mV are acceptable within RS232 specification tolerances
Packaging Format: Cut Tape (CT), Digi-Reel, Tube, or Tape & Reel (TR) formats are interchangeable for the same device package

Substitute parts are grouped into three categories: Direct Equivalents (identical electrical specifications), Upgrades (enhanced performance or temperature range), and Manufacturer Recommended alternatives (validated by original manufacturer or component supplier).

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Operating Temp	Receiver Hysteresis	Package	MSL
SN75C3232PW	Texas Instruments	Obsolete	1Mbps	0°C ~ 70°C	300mV	16-TSSOP	1
SN65C3232PWR	Texas Instruments	Active	1Mbps	-40°C ~ 85°C	300mV	16-TSSOP	1
ICL3232CVZ-T	Renesas Electronics	Active	250kbps	0°C ~ 70°C	300mV	16-TSSOP	3
ST3232ECTR	STMicroelectronics	Active	250kbps	0°C ~ 70°C	500mV	16-TSSOP	1
SP3232EHEY-L/TR	MaxLinear, Inc.	Active	460kbps	-40°C ~ 85°C	300mV	16-TSSOP	1
SP3232EUEY-L/TR	MaxLinear, Inc.	Active	1Mbps	-40°C ~ 85°C	300mV	16-TSSOP	1
ICL3232CVZ	Renesas Electronics	Active	250kbps	0°C ~ 70°C	300mV	16-TSSOP	3
ICL3232ECAZ	Renesas Electronics	Active	250kbps	0°C ~ 70°C	500mV	16-SSOP	3
ICL3232ECAZ-T	Renesas Electronics	Active	250kbps	0°C ~ 70°C	500mV	16-SSOP	3
ICL3232ECV-16Z	Renesas Electronics	Active	250kbps	0°C ~ 70°C	500mV	16-TSSOP	3
ICL3232EIAZ	Renesas Electronics	Active	250kbps	-40°C ~ 85°C	500mV	16-SSOP	3

Engineering Selection Recommendations

Direct Equivalent - Preferred for Pin-Compatible Replacement:

SN65C3232PWR (Texas Instruments) is the active production equivalent of the SN75C3232PW. Both devices share identical electrical specifications (1Mbps data rate, 300mV receiver hysteresis, 3V-5.5V supply), identical package geometry (16-TSSOP), and equivalent MSL rating (1). The SN65C3232PWR extends the operating temperature range to -40°C ~ 85°C, providing enhanced reliability for wider environmental conditions while maintaining full backward compatibility. This part is in active production status with 44,289 units in stock.

Upgrade Options - Enhanced Performance:

SP3232EUEY-L/TR (MaxLinear, Inc.) provides full electrical equivalence to the original part with 1Mbps data rate and 300mV receiver hysteresis, while offering extended temperature range (-40°C ~ 85°C) and active product status. This device is suitable for applications requiring improved thermal performance or long-term supply assurance.

SP3232EHEY-L/TR (MaxLinear, Inc.) operates at 460kbps with extended temperature range (-40°C ~ 85°C) and is appropriate for applications where the original 1Mbps specification is not required but enhanced environmental performance is beneficial.

Manufacturer Recommended Alternatives:

Renesas Electronics ICL3232 series devices (ICL3232CVZ-T, ICL3232CVZ, ICL3232ECV-16Z) are manufacturer-recommended substitutes with 250kbps data rate capability, 300mV receiver hysteresis, and 16-TSSOP package compatibility. These parts maintain the original operating temperature range (0°C ~ 70°C) and are suitable for legacy system support where data rate requirements do not exceed 250kbps.

STMicroelectronics ST3232ECTR is an alternative with 250kbps data rate, 500mV receiver hysteresis, and MSL rating of 1 (Unlimited), providing equivalent moisture sensitivity performance to the original part.

Package Consideration:

ICL3232ECAZ, ICL3232ECAZ-T, and ICL3232EIAZ variants use 16-SSOP package (0.209", 5.30mm Width) instead of 16-TSSOP. These are not pin-compatible with the original SN75C3232PW and require PCB redesign. Selection of these variants is appropriate only when PCB layout modifications are feasible.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN75C3232PW with SN65C3232PWR without PCB modifications?

A: Yes. Both devices use identical 16-TSSOP package geometry and pin configuration. The SN65C3232PWR is the active production equivalent with extended temperature range and is a direct pin-compatible replacement.

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

A: 16-TSSOP has a body width of 0.173" (4.40mm), while 16-SSOP has a body width of 0.209" (5.30mm). These packages are not mechanically compatible and require different PCB footprints. Devices in 16-SSOP package (such as ICL3232ECAZ variants) cannot be used as direct replacements without PCB redesign.

Q: Are lower data rate substitutes (250kbps) compatible with my application?

A: Lower data rate devices are compatible only if your application operates at or below that specified rate. The SN75C3232PW supports 1Mbps; substitutes rated at 250kbps will function correctly in systems using lower baud rates but cannot support the full 1Mbps capability. Verify your system's actual data rate requirement before selecting a lower-rated substitute.

Q: What does MSL rating mean, and why do ICL3232 parts have MSL 3 instead of MSL 1?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to moisture before soldering. MSL 1 (Unlimited) allows indefinite storage without moisture control. MSL 3 (168 Hours) requires storage in dry conditions and limits exposure to 168 hours at specified humidity levels before soldering. For high-volume production or extended storage, MSL 1 rated parts (SN65C3232PWR, ST3232ECTR, SP3232 series) are preferred.

Q: Can I use SP3232EHEY-L/TR if my system requires 1Mbps operation?

A: No. SP3232EHEY-L/TR is rated at 460kbps maximum data rate and cannot reliably support 1Mbps operation. Use SP3232EUEY-L/TR or SN65C3232PWR for 1Mbps applications.

Q: Why is the original SN75C3232PW marked as obsolete?

A: Obsolete status indicates Texas Instruments has discontinued production. The SN65C3232PWR is the active production replacement with equivalent or superior specifications. For new designs or production continuity, transition to SN65C3232PWR or other active alternatives.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant or RoHS Compliant certification, meeting environmental and hazardous substance restrictions equivalent to the original SN75C3232PW.

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