SN75C3232PWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SN75C3232PWR 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, with 1,600 units available in new original stock. The device operates across a 3V to 5.5V supply range and supports 1Mbps data rates with 300mV receiver hysteresis. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for new designs and long-term supply assurance.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	SN75C3232PWR
Product Status	Obsolete
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	300 mV
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN75C3232PWR is determined by the following critical parameters:

Mandatory Compatibility Parameters:

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

Performance Parameters (Allow Variation):

Data Rate: Minimum 1Mbps required
Operating Temperature: May extend beyond 0°C ~ 70°C
Receiver Hysteresis: 300mV or 500mV acceptable

Substitute parts are grouped into four categories based on their relationship to the main part:

Direct Manufacturer Equivalent: SN65C3232PWR maintains identical electrical specifications with extended operating temperature range (-40°C ~ 85°C) and active product status.

Parametric Equivalents: SN75C3232EPWR and TRSF3232ECPWR match all electrical parameters and package specifications with active status and alternative packaging options.

Upgrade Options: SP3232EHEY-L/TR and SP3232EUEY-L/TR from MaxLinear provide extended temperature operation (-40°C ~ 85°C) and active product support with identical package and electrical compatibility.

Manufacturer Recommended Alternatives: ICL3232 series from Renesas Electronics offers multiple packaging variants (CVZ, CVZ-T, ECAZ, ECAZ-T, ECV-16Z) with active status and ROHS3 compliance, though with reduced data rate (250kbps) and higher MSL rating (3).

Parameter Comparison

Part Number	Manufacturer	Status	Data Rate	Temp Range	Package	Hysteresis	MSL	Inventory
SN75C3232PWR	Texas Instruments	Obsolete	1Mbps	0°C ~ 70°C	16-TSSOP	300mV	1	1,600
SN65C3232PWR	Texas Instruments	Active	1Mbps	-40°C ~ 85°C	16-TSSOP	300mV	1	44,289
SN75C3232EPWR	Texas Instruments	Active	1Mbps	0°C ~ 70°C	16-TSSOP	300mV	1	2,300
TRSF3232ECPWR	Texas Instruments	Active	1Mbps	0°C ~ 70°C	16-TSSOP	300mV	1	2,140
SP3232EHEY-L/TR	MaxLinear, Inc.	Active	460Kbps	-40°C ~ 85°C	16-TSSOP	300mV	1	762
SP3232EUEY-L/TR	MaxLinear, Inc.	Active	1Mbps	-40°C ~ 85°C	16-TSSOP	300mV	1	4,778
ICL3232CVZ-T	Renesas Electronics	Active	250kbps	0°C ~ 70°C	16-TSSOP	300mV	3	1,424
ICL3232ECAZ-T	Renesas Electronics	Active	250kbps	0°C ~ 70°C	16-SSOP	500mV	3	30,400
ICL3232ECV-16Z	Renesas Electronics	Active	250kbps	0°C ~ 70°C	16-TSSOP	500mV	3	1,992

Engineering Selection Recommendations

For Direct Replacement with Extended Temperature Support: SN65C3232PWR is the primary recommendation. It maintains identical electrical specifications and package footprint while offering active product status and extended operating temperature range (-40°C ~ 85°C). This part provides the highest inventory availability (44,289 units) and ensures long-term supply continuity.

For Identical Specifications with Active Status: SN75C3232EPWR and TRSF3232ECPWR both match the original part's electrical and thermal specifications with active product status. These are suitable for designs requiring the exact 0°C ~ 70°C operating range. TRSF3232ECPWR offers Tape & Reel packaging, while SN75C3232EPWR provides Cut Tape & Digi-Reel options.

For Extended Temperature Applications: SP3232EUEY-L/TR from MaxLinear maintains 1Mbps data rate with extended temperature operation (-40°C ~ 85°C) and active product support. This option is appropriate for industrial or automotive environments requiring wider temperature margins. SP3232EHEY-L/TR offers similar benefits with reduced data rate (460Kbps), suitable for applications not requiring full 1Mbps bandwidth.

For Cost-Optimized Alternatives: ICL3232CVZ-T from Renesas Electronics provides active product status with ROHS3 compliance and MSL-3 rating. This option is suitable for applications where 250kbps data rate is acceptable. ICL3232ECAZ-T offers the highest inventory availability (30,400 units) with 16-SSOP package, though this requires PCB layout modification due to different package dimensions (0.209", 5.30mm Width versus 0.173", 4.40mm Width).

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use SN65C3232PWR as a direct replacement for SN75C3232PWR?

A: Yes. SN65C3232PWR is electrically and mechanically compatible. Both parts use identical 16-TSSOP packaging, support 1Mbps data rate, and operate across 3V ~ 5.5V supply. The primary difference is SN65C3232PWR has extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) and active product status, making it the preferred choice for new designs.

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

A: 16-TSSOP has a width of 0.173" (4.40mm), while 16-SSOP has a width of 0.209" (5.30mm). These are not pin-compatible without PCB redesign. ICL3232ECAZ and ICL3232ECAZ-T use the wider 16-SSOP package and require different footprints.

Q: Why do some substitutes have lower data rates (250kbps vs 1Mbps)?

A: ICL3232 series from Renesas is rated for 250kbps maximum data rate. This is acceptable for applications using lower baud rates (9600, 19200, 38400 baud). For applications requiring full 1Mbps capability, use SN65C3232PWR, SN75C3232EPWR, TRSF3232ECPWR, or SP3232EUEY-L/TR.

Q: What does MSL-3 (168 Hours) mean compared to MSL-1 (Unlimited)?

A: MSL rating indicates moisture sensitivity. MSL-1 parts have unlimited shelf life in standard conditions. MSL-3 parts must be used within 168 hours of opening the moisture barrier bag. ICL3232 series requires stricter moisture control during storage and assembly.

Q: Which substitute offers the best long-term supply availability?

A: SN65C3232PWR has the highest inventory (44,289 units) and active product status from Texas Instruments, ensuring continued availability. ICL3232ECAZ-T from Renesas also offers strong inventory (30,400 units) with active status, though it requires package footprint modification.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance. MaxLinear parts are marked as RoHS Compliant (equivalent to ROHS3), and all Renesas ICL3232 variants are ROHS3 Compliant.

Q: Can I use SP3232EHEY-L/TR if my application only needs 460Kbps?

A: Yes, if your application operates at or below 460Kbps. SP3232EHEY-L/TR is suitable for lower-speed RS232 applications and offers extended temperature operation (-40°C ~ 85°C). However, SP3232EUEY-L/TR is preferred if 1Mbps capability is needed, as both have identical temperature and supply specifications.

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