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SP3243EBET-L/TR RS232 Transceiver Equivalent & Substitute Parts
Part Overview
The SP3243EBET-L/TR is a 3/5 transceiver full RS232 interface IC manufactured by MaxLinear, Inc., housed in a 28-SOIC surface mount package. This component operates across a 3V to 5.5V supply range with a 250kbps data rate and full-duplex capability. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SP3243EBET-L/TR |
| Manufacturer | MaxLinear, Inc. |
| Type | Transceiver |
| Protocol | RS232 |
| Number of Drivers/Receivers | 3/5 |
| Duplex | Full |
| Data Rate | 250kbps |
| Voltage - Supply | 3V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 28-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Receiver Hysteresis | 300 mV |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility for the SP3243EBET-L/TR is determined by the following critical parameters:
Primary Compatibility Criteria:
- RS232 protocol compliance
- 3/5 driver/receiver configuration
- Full-duplex operation
- 28-SOIC package footprint
- 3V to 5.5V supply voltage range
- Surface mount mounting type
Secondary Compatibility Criteria:
- Data rate capability (minimum 250kbps)
- Operating temperature range (must encompass or match -40°C to 85°C)
- Receiver hysteresis specification (300 mV or 500 mV acceptable)
Substitute parts are grouped into two categories: direct functional equivalents from active product lines (Analog Devices Inc./Maxim Integrated MAX series) and manufacturer-recommended alternatives (Renesas Electronics ICL series and Texas Instruments MAX series variants). All substitute parts maintain identical package geometry and electrical interface compatibility.
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Data Rate | Supply Voltage | Operating Temp | Package | Receiver Hysteresis | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| SP3243EBET-L/TR | MaxLinear, Inc. | RS232 | 3/5 | 250kbps | 3V ~ 5.5V | -40°C ~ 85°C | 28-SOIC | 300 mV | Obsolete | N/A |
| MAX3243EEWI+T | Analog Devices Inc./Maxim Integrated | RS232 | 3/5 | 250kbps | 3V ~ 5.5V | -40°C ~ 85°C | 28-SOIC | 500 mV | Active | ROHS3 Compliant |
| MAX3244EEWI+T | Analog Devices Inc./Maxim Integrated | RS232 | 3/5 | 250kbps | 3V ~ 5.5V | -40°C ~ 85°C | 28-SOIC | 500 mV | Active | ROHS3 Compliant |
| MAX3245EEWI+T | Analog Devices Inc./Maxim Integrated | RS232 | 3/5 | 1Mbps | 3V ~ 5.5V | -40°C ~ 85°C | 28-SOIC | 500 mV | Active | ROHS3 Compliant |
| ICL3243CBZ-T | Renesas Electronics Corporation | RS232 | 3/5 | 250kbps | 3V ~ 5.5V | 0°C ~ 70°C | 28-SOIC | 300 mV | Active | ROHS3 Compliant |
| MAX3243CDWR | Texas Instruments | RS232 | 3/5 | 250kbps | 3V ~ 5.5V | 0°C ~ 70°C | 28-SOIC | 300 mV | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
MAX3243EEWI+T and MAX3244EEWI+T from Analog Devices Inc./Maxim Integrated are the preferred direct substitutes. Both parts maintain identical electrical specifications to the SP3243EBET-L/TR, including 250kbps data rate and -40°C to 85°C operating temperature range. These parts are in active production status with ROHS3 compliance and superior moisture sensitivity rating (MSL 1 vs. MSL 3). The only parameter variance is receiver hysteresis (500 mV vs. 300 mV), which does not affect functional compatibility in standard RS232 applications.
Secondary Substitutes (Extended Temperature Consideration):
MAX3245EEWI+T offers enhanced data rate capability (1Mbps) while maintaining all other electrical parameters. This part is suitable for applications requiring higher bandwidth within the same package footprint.
Alternative Substitutes (Temperature-Limited Applications):
ICL3243CBZ-T (Renesas Electronics) and MAX3243CDWR (Texas Instruments) are active alternatives with matching receiver hysteresis (300 mV) and data rate (250kbps). These parts operate within a narrower temperature range (0°C to 70°C), making them suitable only for applications that do not require the full -40°C to 85°C operating envelope of the original part.
All substitute parts carry ROHS3 compliance certification and are available in tape and reel packaging for production environments.
Frequently Asked Questions (FAQ)
Q: Can MAX3245EEWI+T replace SP3243EBET-L/TR in all applications?
A: MAX3245EEWI+T is electrically compatible and maintains the full -40°C to 85°C operating temperature range. The primary difference is enhanced data rate capability (1Mbps vs. 250kbps). In applications limited to 250kbps operation, this part functions as a direct substitute with no performance degradation. The higher data rate specification does not create incompatibility with lower-speed designs.
Q: What is the significance of receiver hysteresis differences between 300 mV and 500 mV?
A: Receiver hysteresis affects input threshold switching behavior. The SP3243EBET-L/TR specifies 300 mV hysteresis, while most Analog Devices substitutes specify 500 mV. Both values are within RS232 standard compliance. The 500 mV specification provides improved noise immunity in electrically noisy environments. Substitution is valid for standard RS232 applications without additional circuit modifications.
Q: Why do ICL3243CBZ-T and MAX3243CDWR have a narrower operating temperature range?
A: These parts are specified for 0°C to 70°C operation, compared to the original -40°C to 85°C range. Selection of these alternatives is restricted to applications operating within the 0°C to 70°C envelope. Applications requiring extended temperature operation must use MAX3243EEWI+T, MAX3244EEWI+T, or MAX3245EEWI+T.
Q: Are all substitute parts available in tape and reel packaging?
A: MAX3243EEWI+T, MAX3244EEWI+T, MAX3245EEWI+T, ICL3243CBZ-T, and MAX3243CDWR are available in tape and reel (TR) packaging suitable for automated assembly. MAX3243EEWI+ and MAX3244EEWI+ are available in tube packaging. Packaging selection depends on production volume and assembly process requirements.
Q: What is the MSL (Moisture Sensitivity Level) impact when substituting parts?
A: The original SP3243EBET-L/TR carries MSL 3 (168 hours), while all active substitute parts carry MSL 1 (unlimited). MSL 1 represents superior moisture resistance and eliminates bake-out requirements before soldering. This is a beneficial change that simplifies manufacturing processes.
Q: Is ROHS3 compliance mandatory for substitution?
A: All recommended substitute parts carry ROHS3 compliance certification. If your application or supply chain requires ROHS3 compliance, all listed substitutes meet this requirement. The original SP3243EBET-L/TR does not specify ROHS status due to its obsolete classification.
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