SP332

RS232/RS485 Multi-Mode Serial Transceiver
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Overview

Information RS-232/RS-485 Multi-Mode Serial Transceiver
Supported Protocols RS232, V.28, RS485, RS422, V.24
Supply Voltage (Nom) (V) 5
No. of Tx
No. of Rx
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
RS-485 Duplex Full
Max ICC (mA) 120
Package SOIC-28
Temperature Range (°C) 0 to 70, -40 to 85
232 Tx / Rx 4 / 4
485 Tx / Rx 2 / 2
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The SP332 is a monolithic device that contains both RS-232 and RS-485 line drivers and receivers. The configuration of the SP332 can be changed at any time by changing the logic state of two control input pins. The device also includes a loop back function which internally connects driver outputs to receiver inputs for a chip self test. A Sipex-patented charge pump (5,306,954) allows +5V-only operation.


  • +5V-Only Single Supply Operation
  • 4 Drivers, 4 Receivers RS-232
  • 2 Drivers, 2 Receivers RS-485
  • Loop Back Function for Self Test
  • 28 Pin SOIC Packaging

Documentation & Design Tools

All Types Data Sheets Application Notes Schematics & Design Files Product Briefs & Brochures User Guides & Manuals
Type Title Version Date File Size
Data Sheets RS-232/RS-485 Multi-Mode Serial Transceiver 1.0.1 October 2017 484.7 KB
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 FAQs SP332 FAQ 1.0.0 July 2007 211.2 KB
Schematics & Design Files XR21B1420/1421 Evaluation Board Design Files REV 10 June 2016 386.5 KB
Product Brochures Interface Brochure October 2019 1.3 MB
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
SP332CT-L N Y Y Y Y L3 / 260ᵒC WSOIC28
SP332ET-L N Y Y Y Y L3 / 260ᵒC WSOIC28

Click on the links above to download the Certificate of Non-Use of Hazardous Substances.

Additional Quality Documentation may be available, please Contact Support.

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Suggested Replacement Buy Now Order Samples PDN
SP332CT WSOIC28 0 70 OBS
SP332CT/TR WSOIC28 0 70 OBS
SP332CT-L WSOIC28 0 70 Active Order
SP332CT-L/TR WSOIC28 0 70 OBS SP336EEY-L/TR
SP332ET WSOIC28 -40 85 OBS
SP332ET/TR WSOIC28 -40 85 OBS
SP332ET-L WSOIC28 -40 85 Active Order
SP332ET-L/TR WSOIC28 -40 85 OBS SP332ET-L
XR21B1420IL28-0A-EVB Board Active
Show obsolete parts
Part Status Legend
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 PDF
WSOIC28
  • JEDEC Reference: MS-013
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 58.6ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 27
  • Quantity per Reel: 1500
  • Quantity per Tube: 27
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 24 x 12
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 17.90
  • Width: 7.50
  • Thickness: 2.65
  • Lead Pitch: 1.27

Notifications

Distribution Date Description File
12/12/2018 Product Discontinuation Notice
07/11/2017 Product Discontinuation Notification
02/11/2016 Foundry line qualification, Addition of qualified 6 inch wafer processing line in Silan
11/16/2015 Updated information subsequent to original published PCN 15-0625-02 on 09/29/2015. Addendum: Update to package marking.
09/29/2015 Greatek as alternate assembly site Addition of an alternate production site, Greatek, Taiwan for 16L, 24L and 28L SOICW
07/02/2013 Qualified copper wire bonding assembly in addition to currently qualified gold wire bonding assembly in Carsem. Material change.
07/30/2010 Process Change. Capacity enhancement.
02/22/2010 Process Change Complete the transfer of the SP332 wafer fabrication from the Hillview to Silan foundry. In addition, clarify conditions for the datasheets specification limits.
05/07/2007 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
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued.
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

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
 
For RS-485 / RS-422 the data rate can exceed 10Mbps depending on the cable length. A cable length of 15 meters (50 feet) will do a maximum of 10Mbps. A cable length of 1200 meters (4000 feet) will do a maximum of 90kbps over 24 AWG gauge twisted pair cable (with 10 pF/ft). Refer to Annex A TIA/EIA-422-B.
 
 

The SP332 does have failsafe but works best for open line situations without termination.

All pins are Hi Z when in shutdown. Beware of Output Tri-state Leakage: 10 μA, 0.4V ≤ VOUT ≤ 2.4V.

The maximum allowable “operating” junction temperature is 150°C.

θjc for the 28 pin WSOIC = 12.7°C (no exposed pad), theta junction to board is not available.

Yes, the SP331, SP332 and SP334 exceed ±2kV ESD HBM on all pins.  Some interface products have enhanced versions that exceed ±15kV, which applies to the bus data lines.  The parametric search contains ESD information and it is a selection field https://www.exar.com/products/interface/serial-transceivers/multiprotocol/dual-protocol .

ESD tests are “destructive tests.” The part is tested until it suffers damage. Therefore parts cannot be 100% tested in production, instead a sample of parts are characterized during the product qualification. The test procedure consists of “zapping” pins with a given voltage using the appropriate model and then running the part through electrical tests to check for functionality or performance degradation.

ESD is caused by static electricity. In order for an ESD event to occur there must be a buildup of static charge. Very high charge levels are actually quite rare. In a normal factory environment, taking basic ESD precautions (grounding-straps, anti-static smocks, ionizers, humidity control, etc.) static levels can be kept below a few tens of volts. In an uncontrolled environment, like an office, static levels rarely get above 2000 volts. Under some worstcase conditions (wearing synthetic fabrics, rubbing against synthetic upholstered furniture, extremely low humidity)
levels can go as high as 12 to 15 thousand volts. Actually to get to 15000 volts or higher you would need to be in an uncomfortably dry environment (humidity below 10%) otherwise static charge will naturally dissipate through corona discharge. It would definitely be considered a “bad hair day.” Humans can generally feel a static shock only above 3000 volts. A discharge greater than 4000 volts can cause an audible “pop.” But repeated lower level discharges can be imperceptible and still may have a cumulative damaging effect on sensitive ICs. All ICs, even those with robust protection, can be damaged if they are hit hard enough or often enough.

Most ICs in a typical system are at greatest risk of ESD damage in the factory when the PCB is assembled and the system is being built. After the system is put together they are soldered onto the PCB and shielded within a metal or plastic system enclosure. Interface ICs are designed to attach to an external connector that could be exposed to ESD when a cable is plugged in or when a person or object touches the connector. These interface pins are most likely to see ESD exposure and therefore benefit from additional protection.

Actually the letter “E” could have two different meanings, depending on where it is in the part number. Most of our interface devices are available in different temperature grades. Commercial temperature (0 to 70C) has a “C” after the numeric part number. Industrial-extended temperature (-40 to +85C) use the letter E. So for example SP485CN is commercial and SP485EN is industrial. The second letter indicates the package type, in this case N for narrow-SOIC. Another E in the suffix indicates that this device has enhanced ESD protection, typically of ±15000Volts on the interface pins. Devices that do not have the enhanced ESD still contain built-in ESD protection of at least ±2000Volts. For example the SP485ECN is ESD rated up to ±15kV, and the SP485CN is rated for ±2kV HBM.

The best way to determine this is to go to maxlinear.com and type the part into the search function. At or near the top of the results you should see something that looks like:
 
 
 

In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result.  This brings you to the product page. For example:

 
 
 

Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:

 
 
 

Notice the status column and the “Show obsolete parts” link.  A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers, the legend still present:

 
 
 

Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:

 
 
 

And then Product Change Notifications:

 
  
 

Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:

 
 
 

If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.