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SN75C3232DWR RS232 Transceiver Equivalent & Substitute Parts
Part Overview
The SN75C3232DWR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in 16-SOIC surface mount packaging. This interface IC operates across 3V to 5.5V supply voltage with a 1Mbps data rate and 300mV receiver hysteresis. The part is designated as Last Time Buy status, indicating end-of-life production. Equivalent and substitute parts are necessary to ensure design continuity and maintain supply chain flexibility for applications requiring RS232 serial communication interfaces.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SN75C3232DWR |
| Manufacturer | Texas Instruments |
| Category | Interface |
| Type | Transceiver |
| Protocol | RS232 |
| Number of Drivers/Receivers | 2/2 |
| Duplex | Full |
| Data Rate | 1Mbps |
| Voltage Supply Range | 3V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C |
| Package / Case | 16-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Product Status | Last Time Buy |
Substitute Part Grouping Explanation
Substitution eligibility for the SN75C3232DWR is determined by the following critical parameters:
Primary Substitution Criteria:
- Protocol: RS232
- Number of Drivers/Receivers: 2/2
- Duplex: Full
- Package / Case: 16-SOIC surface mount
- Voltage Supply Range: 3V ~ 5.5V
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
Secondary Compatibility Factors:
- Receiver Hysteresis: 300mV (primary specification)
- Data Rate: 1Mbps (primary specification)
- Operating Temperature: 0°C ~ 70°C (primary specification)
Substitute parts are grouped into two categories:
Category 1 - Parametric Equivalents (Identical Electrical Specifications): Parts that match all primary criteria and secondary factors, ensuring direct functional replacement without design modification.
Category 2 - Functional Substitutes (Compatible with Parameter Variations): Parts that satisfy primary substitution criteria but may differ in receiver hysteresis, data rate, or operating temperature range. These parts remain functionally compatible for RS232 2/2 transceiver applications but require design review for specific performance requirements.
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Data Rate | Receiver Hysteresis | Operating Temp | Package | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|
| SN75C3232DWR | Texas Instruments | RS232 | 2/2 | 1Mbps | 300mV | 0°C ~ 70°C | 16-SOIC (7.50mm) | Last Time Buy | 5839 Pcs |
| TRSF3232EIDR | Texas Instruments | RS232 | 2/2 | 1Mbps | 300mV | -40°C ~ 85°C | 16-SOIC (3.90mm) | Active | 3493 Pcs |
| SN75C3232EDWR | Texas Instruments | RS232 | 2/2 | 1Mbps | 300mV | 0°C ~ 70°C | 16-SOIC (7.50mm) | Last Time Buy | 6500 Pcs |
| TRSF3232ECDWR | Texas Instruments | RS232 | 2/2 | 1Mbps | 300mV | 0°C ~ 70°C | 16-SOIC (7.50mm) | Last Time Buy | 9787 Pcs |
| ICL3232ECBZ | Renesas Electronics | RS232 | 2/2 | 250kbps | 500mV | 0°C ~ 70°C | 16-SOIC (7.50mm) | Active | 2125 Pcs |
| ICL3232ECBZ-T | Renesas Electronics | RS232 | 2/2 | 250kbps | 500mV | 0°C ~ 70°C | 16-SOIC (7.50mm) | Active | 1124 Pcs |
| MAX3232CWE+ | Analog Devices/Maxim | RS232 | 2/2 | 235Kbps | 300mV | 0°C ~ 70°C | 16-SOIC (7.50mm) | Active | 2540 Pcs |
| MAX3232CWE+T | Analog Devices/Maxim | RS232 | 2/2 | 235Kbps | 300mV | 0°C ~ 70°C | 16-SOIC (7.50mm) | Active | 5384 Pcs |
| MAX3232ECWE+ | Analog Devices/Maxim | RS232 | 2/2 | 1Mbps | 500mV | 0°C ~ 70°C | 16-SOIC (7.50mm) | Active | 2258 Pcs |
| MAX3232ECWE+T | Analog Devices/Maxim | RS232 | 2/2 | 1Mbps | 500mV | 0°C ~ 70°C | 16-SOIC (7.50mm) | Active | 2136 Pcs |
| MAX3232EWE+ | Analog Devices/Maxim | RS232 | 2/2 | 235Kbps | 300mV | -40°C ~ 85°C | 16-SOIC (7.50mm) | Active | 3100 Pcs |
Engineering Selection Recommendations
Parametric Equivalent Selection (Direct Replacement):
SN75C3232EDWR and TRSF3232ECDWR are parametric equivalents matching all electrical specifications of the SN75C3232DWR. Both parts maintain 1Mbps data rate, 300mV receiver hysteresis, and 0°C to 70°C operating temperature. SN75C3232EDWR provides 6500 units in inventory with identical packaging (16-SOIC 7.50mm width). TRSF3232ECDWR offers the highest inventory availability at 9787 units. Both remain Last Time Buy status, consistent with the original part lifecycle.
Active Product Alternatives:
For applications requiring extended operating temperature range (-40°C to 85°C), TRSF3232EIDR from Texas Instruments maintains 1Mbps data rate and 300mV hysteresis with Active product status. This part features reduced package width (3.90mm) and 3493 units available inventory.
MAX3232ECWE+ and MAX3232ECWE+T from Analog Devices/Maxim Integrated provide Active status with 1Mbps data rate matching the original specification. These parts feature 500mV receiver hysteresis and are available in both tube (2258 Pcs) and cut tape packaging (2136 Pcs).
MAX3232CWE+ and MAX3232CWE+T offer Active status with 300mV receiver hysteresis identical to the original part. Data rate is specified at 235Kbps, lower than the 1Mbps original specification. Inventory availability is 2540 Pcs (tube) and 5384 Pcs (cut tape).
Functional Substitutes with Parameter Variations:
ICL3232ECBZ and ICL3232ECBZ-T from Renesas Electronics Corporation provide Active product status with 2/2 RS232 transceiver functionality. These parts feature 500mV receiver hysteresis and 250kbps data rate, both lower than original specifications. Moisture Sensitivity Level is 3 (168 Hours) compared to MSL 1 (Unlimited) for the original part. Inventory: 2125 Pcs (tube) and 1124 Pcs (tape & reel).
All substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the original SN75C3232DWR.
Frequently Asked Questions (FAQ)
Q: Can SN75C3232EDWR directly replace SN75C3232DWR without design modification?
A: Yes. SN75C3232EDWR is a parametric equivalent with identical electrical specifications: 1Mbps data rate, 300mV receiver hysteresis, 3V to 5.5V supply voltage, 2/2 full-duplex RS232 transceiver configuration, and 16-SOIC surface mount packaging. Operating temperature range remains 0°C to 70°C. No design changes are required.
Q: What is the difference between TRSF3232EIDR and SN75C3232DWR?
A: TRSF3232EIDR maintains identical electrical specifications (1Mbps, 300mV hysteresis, 2/2 RS232) but extends operating temperature range to -40°C to 85°C and features reduced package width (3.90mm versus 7.50mm). Product status is Active rather than Last Time Buy. PCB layout modifications may be required due to package width difference.
Q: Are MAX3232 series parts compatible with SN75C3232DWR?
A: MAX3232 series parts provide 2/2 RS232 transceiver functionality with 3V to 5.5V supply voltage and 16-SOIC surface mount packaging. MAX3232ECWE+ and MAX3232ECWE+T match the 1Mbps data rate but feature 500mV receiver hysteresis. MAX3232CWE+ and MAX3232CWE+T feature 300mV hysteresis matching the original but specify 235Kbps data rate. All MAX3232 variants are Active status products. Functional compatibility is confirmed; performance parameters require design review.
Q: What is the significance of packaging width differences (7.50mm versus 3.90mm)?
A: Package width affects PCB footprint and component placement. TRSF3232EIDR at 3.90mm width requires PCB layout verification to confirm pad spacing compatibility. Standard 16-SOIC packages at 7.50mm width (SN75C3232DWR, SN75C3232EDWR, TRSF3232ECDWR) maintain consistent footprints across substitution.
Q: Why do ICL3232ECBZ parts have lower data rate (250kbps) than the original?
A: ICL3232ECBZ is manufactured by Renesas Electronics Corporation with different internal design specifications. The 250kbps data rate and 500mV receiver hysteresis represent the device's rated performance characteristics. These parts remain functionally compatible for RS232 2/2 transceiver applications but are suitable only for designs not requiring 1Mbps performance.
Q: What does Moisture Sensitivity Level (MSL) 3 mean for ICL3232ECBZ parts?
A: MSL 3 (168 Hours) indicates the component requires controlled humidity storage and has a 168-hour floor life after moisture exposure. Original SN75C3232DWR specifies MSL 1 (Unlimited), requiring no moisture control. ICL3232ECBZ parts require stricter handling and storage protocols compared to the original part.
Q: Which substitute offers the best inventory availability?
A: TRSF3232ECDWR provides the highest inventory at 9787 units with parametric equivalence to SN75C3232DWR (1Mbps, 300mV hysteresis, 0°C to 70°C operating range, 16-SOIC 7.50mm package). This part maintains Last Time Buy status and identical electrical specifications.
Q: Can I use MAX3232EWE+ for applications requiring -40°C to 85°C operating range?
A: Yes. MAX3232EWE+ specifies -40°C to 85°C operating temperature with 300mV receiver hysteresis and 235Kbps data rate. This part is suitable for extended temperature applications but features lower data rate (235Kbps versus 1Mbps original). Product status is Active with 3100 units inventory availability.
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