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SP3232EUCT-L RS232 Transceiver Equivalent & Substitute Parts
Part Overview
The SP3232EUCT-L is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 16-SOIC surface mount package. This interface IC operates across a 3V to 5.5V supply range with a 1Mbps data rate and 300mV receiver hysteresis. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SP3232EUCT-L |
| Manufacturer | MaxLinear, Inc. |
| Category | Interface |
| 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 (0.295", 7.50mm Width) |
| Supplier Device Package | 16-SOIC |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the SP3232EUCT-L 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
- Package / Case: 16-SOIC (0.295", 7.50mm Width)
- Mounting Type: Surface Mount
- Voltage - Supply: 3V ~ 5.5V (minimum requirement)
- Data Rate: 1 Mbps (minimum requirement)
Acceptable Variations:
- Receiver Hysteresis: 300 mV baseline; higher values (400 mV, 650 mV) remain functionally compatible
- Operating Temperature: Extended ranges (-40°C ~ 85°C) are acceptable upgrades; narrower ranges (0°C ~ 70°C) match the original
- Product Status: Active or Last Time Buy parts are acceptable replacements for obsolete parts
- Moisture Sensitivity Level: Lower MSL values (1 = Unlimited) represent improved handling characteristics
Substitute parts are grouped into three categories: direct replacements (matching all parameters), upgrades (extended temperature range), and manufacturer-recommended alternatives (different electrical characteristics within acceptable tolerance).
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Duplex | Receiver Hysteresis | Data Rate | Voltage Supply | Operating Temp | Package | Product Status | MSL |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SP3232EUCT-L | MaxLinear, Inc. | RS232 | 2/2 | Full | 300 mV | 1 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 16-SOIC | Obsolete | 3 |
| SN75C3232DWR | Texas Instruments | RS232 | 2/2 | Full | 300 mV | 1 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 16-SOIC | Last Time Buy | 1 |
| SN75C3232EDWR | Texas Instruments | RS232 | 2/2 | Full | 300 mV | 1 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 16-SOIC | Last Time Buy | 1 |
| TRSF3232ECDWR | Texas Instruments | RS232 | 2/2 | Full | 300 mV | 1 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 16-SOIC | Last Time Buy | 1 |
| SN65C3232DW | Texas Instruments | RS232 | 2/2 | Full | 300 mV | 1 Mbps | 3V ~ 5.5V | -40°C ~ 85°C | 16-SOIC | Last Time Buy | 1 |
| SN65C3232EDW | Texas Instruments | RS232 | 2/2 | Full | 300 mV | 1 Mbps | 3V ~ 5.5V | -40°C ~ 85°C | 16-SOIC | Last Time Buy | 1 |
| TRSF3232EIDW | Texas Instruments | RS232 | 2/2 | Full | 300 mV | 1 Mbps | 3V ~ 5.5V | -40°C ~ 85°C | 16-SOIC | Last Time Buy | 1 |
| TRSF3232EIDWR | Texas Instruments | RS232 | 2/2 | Full | 300 mV | 1 Mbps | 3V ~ 5.5V | -40°C ~ 85°C | 16-SOIC | Last Time Buy | 1 |
| ADM202EARWZ | Analog Devices Inc. | RS232 | 2/2 | Full | 650 mV | 230 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 16-SOIC | Active | 1 |
| ADM202EARWZ-REEL | Analog Devices Inc. | RS232 | 2/2 | Full | 650 mV | 230 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 16-SOIC | Active | 1 |
| ADM202JRWZ | Analog Devices Inc. | RS232 | 2/2 | Full | 400 mV | — | 4.5V ~ 5.5V | 0°C ~ 70°C | 16-SOIC | Active | 1 |
Engineering Selection Recommendations
Direct Replacements (Identical Electrical Parameters): SN75C3232DWR, SN75C3232EDWR, and TRSF3232ECDWR from Texas Instruments provide direct functional equivalence to the SP3232EUCT-L. All three maintain 300mV receiver hysteresis, 1Mbps data rate, and 3V–5.5V supply compatibility. These parts carry Last Time Buy status and improved MSL ratings (1 vs. 3), reducing moisture-related handling risks. Packaging differences (Tape & Reel vs. original) do not affect electrical performance.
Upgraded Alternatives (Extended Temperature Range): SN65C3232DW, SN65C3232EDW, TRSF3232EIDW, and TRSF3232EIDWR extend the operating temperature range to -40°C ~ 85°C while maintaining all other electrical specifications. These upgrades are suitable for applications requiring broader thermal performance. All carry Last Time Buy status and MSL 1 ratings.
Manufacturer-Recommended Alternatives (Analog Devices): ADM202EARWZ, ADM202EARWZ-REEL, and ADM202JRWZ from Analog Devices are active production parts with different electrical characteristics. The ADM202EARWZ variants operate at 4.5V ~ 5.5V (narrower supply range) with 650mV receiver hysteresis and 230kbps data rate. ADM202JRWZ operates at 0°C ~ 70°C with 400mV hysteresis. These parts are suitable only when the application can accommodate the specified electrical parameter variations. All carry Active status and MSL 1 ratings.
Frequently Asked Questions (FAQ)
Q: Can I use SN75C3232DWR as a direct replacement for SP3232EUCT-L? A: Yes. SN75C3232DWR matches all critical electrical parameters: RS232 protocol, 2/2 drivers/receivers, full duplex, 300mV hysteresis, 1Mbps data rate, and 3V–5.5V supply range. The 16-SOIC package is identical. Packaging format (Tape & Reel) does not affect electrical compatibility.
Q: What is the difference between the Texas Instruments SN75C3232 and SN65C3232 series? A: The SN65C3232 series extends the operating temperature range to -40°C ~ 85°C, compared to 0°C ~ 70°C for the SN75C3232 series. All other electrical specifications remain identical. Select SN65C3232 for applications requiring wider thermal performance.
Q: Why do the Analog Devices ADM202 parts have different electrical specifications? A: The ADM202 series operates at a narrower supply voltage range (4.5V ~ 5.5V vs. 3V ~ 5.5V) and lower data rate (230kbps vs. 1Mbps). These parts are manufacturer-recommended alternatives but require verification that your application can operate within these constraints.
Q: Does MSL rating affect electrical performance? A: No. Moisture Sensitivity Level (MSL) affects handling and storage requirements, not electrical function. Lower MSL values (1 = Unlimited) indicate less stringent moisture control during manufacturing and storage. MSL 1 parts are generally preferred for supply chain flexibility.
Q: Can I substitute ADM202JRWZ for SP3232EUCT-L in a 3V application? A: No. ADM202JRWZ requires a minimum supply voltage of 4.5V and cannot operate at 3V. Verify your application's supply voltage range before selecting this part.
Q: Are all substitute parts RoHS3 compliant? A: Yes. All Texas Instruments and Analog Devices substitute parts listed carry RoHS3 compliance certification, matching the regulatory requirements of the original SP3232EUCT-L.
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