Overview
Information | Programmable RS-232/RS-485 Transceiver |
---|---|
Supported Protocols | RS232, V.28, RS485, RS422, V.24 |
Supply Voltage (Nom) (V) | 5 |
232 Tx / Rx | 4 / 4 |
485 Tx / Rx | 2 / 2 |
RS-232 Max Data Rate (Mbps) | 0.12 |
RS-485/RS-422 Max Data Rate (Mbps) | 10 |
HBM ESD (kV) | 2 |
IEC 61000-4-2 Contact (±kV) | - |
120Ω Termination | |
VL Pin | |
232 Full Handshake | |
Slew Limit Pin | |
Fault Tolerance (V) | |
RS-485 Duplex | Full |
Max ICC (mA) | 30 |
Temperature Range (°C) | 0 to 70, -40 to 85 |
Package | SOIC-28 |
The SP331 is a programmable RS-232 and/or RS-485 transceiver IC. The SP331 contains four drivers and four receivers when selected in RS-232 mode; and two drivers and two receivers when selected in RS-485 mode. The SP331 also contains a dual mode which has two RS-232 drivers/receivers plus one differential RS-485 driver/receiver.
The RS-232 transceivers can typically operate at 230kbps while adhering to the RS-232 specifications. The RS-485 transceivers can operate up to 10Mbps while adhering to the RS-485 specifications. The SP331 includes a self-test loopback mode where the driver outputs are internally configured to the receiver inputs. This allows for easy diagnostic serial port testing without using an external loopback plug. The RS-232 and RS-485 drivers can be disabled (High-Z output) by controlling a set of four select pins.
- +5V Only Operation
- Software Programmable RS-232 or RS-485 Selection
- Four RS-232 Transceivers iRS-232 Mode
- Two RS-485 Full-Duplex Transceivers in RS-485 Mode
- Two RS-232 Transceivers and One RS-485 Transceiver in Dual Mode
- Self-Testing Loopback Mode
- Full Driver Tri-State (Hi-Z) Control
- Ideal for RS-232 to RS-485 conversion
Documentation & Design Tools
Type | Title | Version | Date | File Size |
---|---|---|---|---|
Data Sheets | SP331 Programmable Dual RS-232/RS-485 Transceiver | 1.0.1 | March 2018 | 561.5 KB |
Application Notes | Advantages of Designing with Multi-Protocol Transceivers Application Note | R00 | September 2023 | 2.5 MB |
Application Notes | DAN-190, MaxLinear UARTs in RS-485 Applications | R01 | July 2023 | 2.4 MB |
Application Notes | RS-232 and RS-485 PCB Layout Application Note | R00 | December 2022 | 2.8 MB |
Application Notes | ANI-16, Design Guide for Multi-Protocol Serial Ports | A | November 2005 | 462.9 KB |
User Guides & Manuals | XR21B1420 Evaluation Board User’s Manual | 1B | January 2020 | 1.2 MB |
Product Brochures | Interface Brochure | R01 | June 2024 | 3.6 MB |
Product FAQs | SP331 FAQ | 1.0.0 | June 2006 | 190.7 KB |
Schematics & Design Files | XR21B1420/1421 Evaluation Board Design Files | REV 10 | June 2016 | 386.5 KB |
Quality & RoHS
Part Number | RoHS | Exempt | RoHS | Halogen Free | REACH | TSCA | MSL Rating / Peak Reflow | Package |
---|---|---|---|---|---|---|---|
SP331CT-L | N | Y | Y | Y | Y | L3 / 260ᵒC | WSOIC28 |
SP331CT-L/TR | N | Y | Y | Y | Y | L3 / 260ᵒC | WSOIC28 |
SP331ET-L | N | Y | Y | Y | Y | L3 / 260ᵒC | WSOIC28 |
SP331ET-L/TR | N | Y | Y | Y | Y | L3 / 260ᵒC | WSOIC28 |
Click on the links above to download the Certificate of Non-Use of Hazardous Substances.
Parts & Purchasing
Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | Buy Now | Order Samples | PDN |
---|---|---|---|---|---|---|---|---|
SP331CT | WSOIC28 | 0 | 70 | OBS | ||||
SP331CT-L | WSOIC28 | 0 | 70 | Active | Click Buy Now | Order | ||
SP331CT-L/TR | WSOIC28 | 0 | 70 | Active | Click Buy Now | Order | ||
SP331CT/TR | WSOIC28 | 0 | 70 | OBS | ||||
SP331ET | WSOIC28 | -40 | 85 | OBS | ||||
SP331ET-L | WSOIC28 | -40 | 85 | Active | Click Buy Now | Order | ||
SP331ET-L/TR | WSOIC28 | -40 | 85 | Active | Click Buy Now | Order | ||
SP331ET/TR | WSOIC28 | -40 | 85 | OBS | ||||
XR21B1420IL28-0A-EVB | Board | Active | Click Buy Now |
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
Pkg Code | Details | Quantities | Dimensions |
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WSOIC28 |
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Notifications
Distribution Date | Description | File |
---|---|---|
07/17/2023 | In 2023, MaxLinear will be converting all shipping labels for the parts noted from an EXAR format to MaxLinear’s label. During this transition customers may receive either label. This change affects only shipping and packing labels. This change will not affect the part number, part marking, manufacturing process or manufacturing sites. Only work in progress material will be converted. Existing inventory from MaxLinear’s warehouse, channel sales, distributor, and such, will not be converted. Hence, customers may experience receiving mixed shipments with both Exar and MaxLinear labels for some period until existing inventory of old labels is eventually cleared out. Situation is product to product with no predictable way to determine when all old labels will be exhausted. No change to product form, fit, function and reliability. ADDENDUM A: Fixed MBB label logo for DX204001 to MaxLinear logo. ADDENDUM B: Replaced ‘All other affected products outer box label’ with clearer pictures. Corrected Date Issued (from original PCN) issue date +90 days to August 30, 2023. | PCN & PDN Download |
06/01/2023 | In 2023, MaxLinear will be converting all shipping labels for the parts noted from an EXAR format to MaxLinear’s label. During this transition customers may receive either label. This change affects only shipping and packing labels. This change will not affect the part number, part marking, manufacturing process or manufacturing sites. Only work in progress material will be converted. Existing inventory from MaxLinear’s warehouse, channel sales, distributor, and such, will not be converted. Hence, customers may experience receiving mixed shipments with both Exar and MaxLinear labels for some period until existing inventory of old labels is eventually cleared out. Situation is product to product with no predictable way to determine when all old labels will be exhausted. No change to product form, fit, function and reliability. | PCN & PDN Download |
06/01/2023 | In 2023, MaxLinear will be converting all shipping labels for the parts noted from an EXAR format to MaxLinear’s label. During this transition customers may receive either label. This change affects only shipping and packing labels. This change will not affect the part number, part marking, manufacturing process or manufacturing sites. Only work in progress material will be converted. Existing inventory from MaxLinear’s warehouse, channel sales, distributor, and such, will not be converted. Hence, customers may experience receiving mixed shipments with both Exar and MaxLinear labels for some period until existing inventory of old labels is eventually cleared out. Situation is product to product with no predictable way to determine when all old labels will be exhausted. No change to product form, fit, function and reliability. ADDENDUM: Fixed MBB label logo for DX204001 to MaxLinear logo. | PCN & PDN Download |
02/11/2016 | Foundry line qualification, Addition of qualified 6 inch wafer processing line in Silan | PCN & PDN Download |
11/16/2015 | Updated information subsequent to original published PCN 15-0625-02 on 09/29/2015. Addendum: Update to package marking. | PCN & PDN Download |
09/29/2015 | Greatek as alternate assembly site Addition of an alternate production site, Greatek, Taiwan for 16L, 24L and 28L SOICW | PCN & PDN Download |
07/02/2013 | Qualified copper wire bonding assembly in addition to currently qualified gold wire bonding assembly in Carsem. Material change. | PCN & PDN Download |
07/30/2010 | Process Change. Capacity enhancement. | PCN & PDN Download |
02/22/2010 | Process Change Process optimization and clarify conditions for the datasheets parameters. | PCN & PDN Download |
02/28/2007 | Product Obsolescence Letter and Discontinuation Notification. Discontinued. | PCN & PDN Download |
06/26/2006 | Amendment of PCN transferring certain Power Management and Interface Products from Hillview fabrication and facility to wafer foundary Episil instead of Silan. See attached Product List Power Management and Interface products as listed are being transfer to external wafer foundry, due to cessation of operations of the sipex Hillview Fabrication manufacturing site | PCN & PDN Download |
02/02/2006 | Announcing transfer of certain Power Management and Interface Products from Hillview fabrication and facility to wafer foundary Silan. See attached Product List Power Management and Interface products as listed are being transfer to external wafer foundry, due to cessation of operations of the sipex Hillview Fabrication manufacturing site | PCN & PDN Download |
FAQs & Support
Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.
Submit a Technical Support Question As a New Question
For RS-232 it is 50 feet (15 meters), or the cable length equal to a capacitance of 2500 pF, at a maximum transmission rate of 19.2kbps. When we reduce the baud rate, it allows for longer cable length. For Example:
Baud Rate (bps) | Maximum RS-232 Cable Length (ft) |
19200 | 50 |
9600 | 500 |
4800 | 1000 |
2400 | 3000 |
The Parts & Purchasing section of the product page shows the Status of all orderable part numbers for that product. Click Show obsolete parts, to see all EOL or OBS products.
Videos
How to Design a Multiprotocol System using Only 1 Connector
Industrial networks support multiple serial interfaces such as RS-485 and RS-232. Using a multiprotocol transceiver enables industrial equipment to support both protocols using only one connector. Enabling both smaller and lower cost equipment designs. This video describes how to design multiprotocol systems using only one connector.