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SP3243EBCT-L/TR RS232 Transceiver Equivalent & Substitute Parts
Part Overview
The SP3243EBCT-L/TR is a 3/5 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 28-SOIC surface mount package. This interface IC operates across 3V to 5.5V supply voltage with a 250kbps data rate and 300mV receiver hysteresis. 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 | SP3243EBCT-L/TR |
| Manufacturer | MaxLinear, Inc. |
| Type | Transceiver |
| Protocol | RS232 |
| Number of Drivers/Receivers | 3/5 |
| Duplex | Full |
| Receiver Hysteresis | 300 mV |
| Data Rate | 250kbps |
| Voltage - Supply | 3V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C |
| Package / Case | 28-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the SP3243EBCT-L/TR is determined by the following critical parameters:
- Protocol: RS232 full-duplex transceiver
- Driver/Receiver Configuration: 3/5 (3 drivers, 5 receivers)
- Package: 28-SOIC surface mount
- Supply Voltage Range: 3V ~ 5.5V
- Data Rate: 250kbps minimum
- Receiver Hysteresis: 300mV or higher
- Operating Temperature: 0°C ~ 70°C minimum range
Substitute parts are grouped into three categories based on product status and operational characteristics:
Direct Substitutes (Active Status): Parts with identical electrical specifications and active manufacturing status.
Upgrade Substitutes (Enhanced Specifications): Parts with extended operating temperature ranges (-40°C ~ 85°C), improved receiver hysteresis (500mV), or higher data rates (500kbps), maintaining full backward compatibility.
Equivalent Substitutes (Matching Specifications): Parts with identical core parameters but different product status or manufacturer.
Parameter Comparison
| Part Number | Manufacturer | Receiver Hysteresis | Data Rate | Operating Temperature | Product Status | MSL | Packaging |
|---|---|---|---|---|---|---|---|
| SP3243EBCT-L/TR | MaxLinear, Inc. | 300 mV | 250kbps | 0°C ~ 70°C | Obsolete | 3 (168 Hours) | - |
| MAX3243ECWI+ | Analog Devices Inc./Maxim Integrated | 300 mV | 250kbps | 0°C ~ 70°C | Active | 1 (Unlimited) | Tube |
| MAX3244ECWI+ | Analog Devices Inc./Maxim Integrated | 500 mV | 250kbps | 0°C ~ 70°C | Active | 1 (Unlimited) | Tube |
| MAX3243EEWI+ | Analog Devices Inc./Maxim Integrated | 500 mV | 250kbps | -40°C ~ 85°C | Active | 1 (Unlimited) | Tube |
| MAX3243EEWI+T | Analog Devices Inc./Maxim Integrated | 500 mV | 250kbps | -40°C ~ 85°C | Active | 1 (Unlimited) | Tape & Reel (TR) |
| MAX3243EIDW | Texas Instruments | 500 mV | 500kbps | -40°C ~ 85°C | Last Time Buy | 1 (Unlimited) | Tube |
| MAX3243EIDWR | Texas Instruments | 500 mV | 500kbps | -40°C ~ 85°C | Active | 1 (Unlimited) | Tape & Reel (TR) |
| MAX3244EEWI+ | Analog Devices Inc./Maxim Integrated | 500 mV | 250kbps | -40°C ~ 85°C | Active | 1 (Unlimited) | Tube |
| MAX3244EEWI+T | Analog Devices Inc./Maxim Integrated | 500 mV | 250kbps | -40°C ~ 85°C | Active | 1 (Unlimited) | Tape & Reel (TR) |
| TRS3243IDWR | Texas Instruments | 500 mV | 250kbps | -40°C ~ 85°C | Discontinued at DiGi Electronics | 1 (Unlimited) | - |
| ICL3243CBZ | Renesas Electronics Corporation | 300 mV | 250kbps | 0°C ~ 70°C | Active | 3 (168 Hours) | Tube |
Engineering Selection Recommendations
For Direct Replacement (Identical Specifications):
MAX3243ECWI+ is the primary direct substitute, offering identical electrical specifications (300mV receiver hysteresis, 250kbps data rate, 0°C ~ 70°C operating range) with active product status from Analog Devices Inc./Maxim Integrated. This part maintains the same MSL rating transition from 3 to 1, indicating improved moisture handling. ICL3243CBZ from Renesas Electronics Corporation provides an alternative with matching specifications and active status, retaining MSL 3 classification.
For Extended Operating Range Applications:
MAX3243EEWI+, MAX3243EEWI+T, MAX3244EEWI+, and MAX3244EEWI+T extend the operating temperature range to -40°C ~ 85°C, suitable for industrial and automotive environments. MAX3243EEWI+T and MAX3244EEWI+T are available in Tape & Reel packaging for high-volume production. All maintain ROHS3 compliance and unlimited MSL rating.
For Enhanced Data Rate Requirements:
MAX3243EIDWR from Texas Instruments provides 500kbps data rate capability with -40°C ~ 85°C operating range and active product status. This part supports higher-speed RS232 communication while maintaining full backward compatibility with the original 3/5 transceiver configuration.
For Discontinued Product Support:
TRS3243IDWR is classified as discontinued at DiGi Electronics but remains available through alternative channels. MAX3243EIDW carries Last Time Buy status and should be evaluated for long-term availability before selection.
All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 export classification.
Frequently Asked Questions (FAQ)
Q: Can MAX3244ECWI+ replace SP3243EBCT-L/TR directly?
A: MAX3244ECWI+ is functionally compatible but features 500mV receiver hysteresis compared to the original 300mV. This higher hysteresis provides improved noise immunity and is backward compatible with systems designed for 300mV hysteresis. Operating temperature and data rate remain identical.
Q: What is the difference between MAX3243EEWI+ and MAX3243EEWI+T?
A: Both parts are electrically identical with extended -40°C ~ 85°C operating range and 500mV receiver hysteresis. The primary difference is packaging: MAX3243EEWI+ is supplied in Tube format, while MAX3243EEWI+T is supplied in Tape & Reel (TR) format for automated assembly processes.
Q: Is ICL3243CBZ a suitable replacement for the original SP3243EBCT-L/TR?
A: Yes. ICL3243CBZ from Renesas Electronics Corporation matches the original specifications exactly: 300mV receiver hysteresis, 250kbps data rate, 0°C ~ 70°C operating range, and MSL 3 rating. It is currently in active production status.
Q: Can I use MAX3243EIDWR in applications requiring only 250kbps data rate?
A: Yes. MAX3243EIDWR operates at 500kbps maximum data rate but is fully compatible with 250kbps applications. The higher data rate capability does not affect operation at lower speeds. This part offers extended temperature range (-40°C ~ 85°C) and improved receiver hysteresis (500mV) as additional benefits.
Q: What is the significance of MSL rating differences between the original part and substitutes?
A: The original SP3243EBCT-L/TR carries MSL 3 (168 hours), indicating moisture sensitivity requiring controlled storage. Most active substitutes feature MSL 1 (unlimited), eliminating moisture-related storage constraints. ICL3243CBZ maintains MSL 3 classification for applications with existing moisture management protocols.
Q: Are all substitute parts available in 28-SOIC package?
A: Yes. All listed substitute parts maintain the 28-SOIC (0.295", 7.50mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.
Q: Which substitute offers the best long-term availability?
A: MAX3243EEWI+T and MAX3244EEWI+T from Analog Devices Inc./Maxim Integrated carry active product status with extended operating temperature range and unlimited MSL rating, indicating strong long-term manufacturing commitment and suitability for new designs.
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