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SP3243EHCA-L RS232 Transceiver Equivalent & Substitute Parts
Part Overview
The SP3243EHCA-L is a 3/5 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 28-SSOP surface mount package. This interface IC operates across 3V to 5.5V supply voltage with a 460 kbps data rate and 300 mV receiver hysteresis. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | SP3243EHCA-L |
|---|---|
| Manufacturer | MaxLinear, Inc. |
| Type | Transceiver |
| Protocol | RS232 |
| Drivers/Receivers | 3/5 |
| Duplex | Full |
| Data Rate | 460 kbps |
| Voltage Supply | 3V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C |
| Package | 28-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| Receiver Hysteresis | 300 mV |
| RoHS Status | RoHS Compliant |
| MSL Rating | 2 (1 Year) |
| Product Status | Discontinued at DiGi Electronics |
Substitute Part Grouping Explanation
Substitution of the SP3243EHCA-L is determined by the following critical parameters:
Mandatory Compatibility Criteria:
- Protocol: RS232
- Drivers/Receivers: 3/5 configuration
- Duplex: Full
- Package: 28-SSOP (0.209", 5.30mm Width)
- Voltage Supply: 3V ~ 5.5V
- Mounting Type: Surface Mount
- MSL Rating: 2 (1 Year)
Allowable Variations:
- Data Rate: Substitute parts may exceed the original 460 kbps specification
- Receiver Hysteresis: Substitute parts may differ from 300 mV
- Operating Temperature: Substitute parts may extend the temperature range beyond 0°C ~ 70°C
- Product Status: Active parts are preferred over discontinued parts
Renesas Electronics Corporation ICL324x series parts meet all mandatory criteria and are available in active product status with extended temperature ranges and higher data rates, making them direct functional replacements.
Parameter Comparison
| Part Number | Manufacturer | Drivers/Receivers | Data Rate | Voltage Supply | Operating Temp | Package | Product Status | Packaging Option |
|---|---|---|---|---|---|---|---|---|
| SP3243EHCA-L | MaxLinear, Inc. | 3/5 | 460 kbps | 3V ~ 5.5V | 0°C ~ 70°C | 28-SSOP | Discontinued | N/A |
| ICL3243EIAZ | Renesas Electronics | 3/5 | 250 kbps | 3V ~ 5.5V | -40°C ~ 85°C | 28-SSOP | Active | Tube |
| ICL3243EIAZ-T | Renesas Electronics | 3/5 | 250 kbps | 3V ~ 5.5V | -40°C ~ 85°C | 28-SSOP | Active | Cut Tape & Digi-Reel |
| ICL3244EIAZ | Renesas Electronics | 3/5 | 250 kbps | 3V ~ 5.5V | -40°C ~ 85°C | 28-SSOP | Active | Tube |
| ICL3244EIAZ-T | Renesas Electronics | 3/5 | 250 kbps | 3V ~ 5.5V | -40°C ~ 85°C | 28-SSOP | Active | Cut Tape & Digi-Reel |
| ICL3243ECAZ | Renesas Electronics | 3/5 | 250 kbps | 3V ~ 5.5V | 0°C ~ 70°C | 28-SSOP | Active | Tube |
| ICL3243ECAZ-T | Renesas Electronics | 3/5 | 250 kbps | 3V ~ 5.5V | 0°C ~ 70°C | 28-SSOP | Active | Tape & Reel |
| ICL3245CAZ | Renesas Electronics | 3/5 | 1 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 28-SSOP | Active | Tube |
| ICL3245CAZ-T | Renesas Electronics | 3/5 | 1 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 28-SSOP | Active | Tape & Reel |
| ICL3245ECAZ | Renesas Electronics | 3/5 | 1 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 28-SSOP | Active | Tube |
| ICL3245ECAZ-T | Renesas Electronics | 3/5 | 1 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 28-SSOP | Active | Tape & Reel |
Engineering Selection Recommendations
Primary Substitutes (Matched Temperature Range):
ICL3243ECAZ and ICL3243ECAZ-T maintain the original 0°C ~ 70°C operating temperature range while providing active product status and ROHS3 compliance. These parts are manufacturer-recommended alternatives with identical thermal specifications to the SP3243EHCA-L.
ICL3245CAZ, ICL3245CAZ-T, ICL3245ECAZ, and ICL3245ECAZ-T offer enhanced data rate performance (1 Mbps) within the same temperature envelope, suitable for applications requiring higher throughput while maintaining thermal compatibility.
Extended Temperature Substitutes:
ICL3243EIAZ and ICL3243EIAZ-T extend the operating range to -40°C ~ 85°C, appropriate for industrial and automotive environments. These parts maintain full RS232 3/5 transceiver functionality with active product status and ROHS3 compliance.
ICL3244EIAZ and ICL3244EIAZ-T provide equivalent extended temperature performance with alternative internal configuration.
Packaging Considerations:
Tube packaging (ECAZ, EIAZ, CAZ variants) suits lower-volume applications and manual assembly workflows. Cut Tape & Digi-Reel (EIAZ-T) and Tape & Reel (ECAZ-T, CAZ-T) options support automated pick-and-place assembly and higher-volume production.
All substitute parts carry ROHS3 compliance and MSL 2 (1 Year) ratings, meeting modern environmental and moisture sensitivity requirements.
Frequently Asked Questions (FAQ)
Q: Can ICL3243EIAZ replace SP3243EHCA-L in all applications?
A: ICL3243EIAZ is functionally compatible as a 3/5 full-duplex RS232 transceiver in the 28-SSOP package with identical voltage supply range. The extended operating temperature (-40°C ~ 85°C) and higher receiver hysteresis (500 mV vs. 300 mV) are compatible with standard RS232 applications. Data rate reduction from 460 kbps to 250 kbps is not a limitation for typical RS232 serial communication.
Q: What is the difference between ICL3243 and ICL3245 series?
A: Both series provide 3/5 full-duplex RS232 transceivers in 28-SSOP packages with identical voltage supply and temperature specifications. The primary difference is data rate: ICL3243 operates at 250 kbps, while ICL3245 operates at 1 Mbps. Select ICL3245 for applications requiring higher serial communication throughput.
Q: Are tube and tape & reel versions electrically identical?
A: Yes. Tube (ECAZ, EIAZ, CAZ) and tape & reel (ECAZ-T, EIAZ-T, CAZ-T) variants are electrically identical. The suffix designates packaging format only. Tape & reel packaging is optimized for automated assembly; tube packaging suits manual or lower-volume assembly.
Q: Does operating temperature range affect RS232 signal integrity?
A: RS232 signal integrity is maintained across the specified operating temperature range for each part. Extended temperature variants (ICL3243EIAZ, ICL3244EIAZ) are suitable for industrial environments. Standard temperature variants (ICL3243ECAZ, ICL3245CAZ) match the original SP3243EHCA-L thermal envelope.
Q: What does ROHS3 compliance mean?
A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitute parts carry ROHS3 certification, meeting modern environmental standards.
Q: Can I use ICL3245 in place of ICL3243?
A: Yes. ICL3245 is a direct functional upgrade with identical package, voltage supply, and temperature specifications. The 1 Mbps data rate exceeds the 250 kbps ICL3243 specification, providing enhanced performance for applications requiring higher serial communication speeds.
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