SP232E

+/-15KV ESD, 5V Single-Supply RS-232 Drivers/Receivers

Description

The SP202E, SP232E, SP233E, SP310E and SP312E devices are a family of line driver and receiver pairs that meets the specifications of RS-232 and V.28 serial protocols. The devices are pin-to-pin compatible with Exar's SP232A, SP233A, SP310A and SP312A devices as well as popular industry standard pinouts. The ESD tolerance has been improved on these devices to over +/-15kV for Human Body Model. This series offer a 120kbps data rate under load, small ceramic type 0.1µF charge pump capacitors and overall ruggedness for comercial applications. Features include Exar's BiCMOS design which allowing low power operation without sacrificing performance. The series is available in lead free packages with commercial and industrial temperature ranges.

For technical support or help choosing a product please email Exar’s Serial Technical Support group at:  serialtechsupport@exar.com.

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Features

  • Operates from Single +5V Power Supply
  • Meets All RS-232D and ITU V.28 Specifications
  • Operates with 0.1µF to 1µF Capacitors
  • High Data Rate - 120Kbps Under Load
  • Low Power CMOS, 3mA Operation
  • Improved ESD Specifications:
    • ±15kV Human Body Model

Application

Design Tools

Packaging

Pkg Code Details Quantities Dimensions PDF
NSOIC16
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L2 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 82.2ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 49
  • Quantity per Reel: 2500
  • Quantity per Tube: 49
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 9.90
  • Width: 3.90
  • Thickness: 1.75
  • Lead Pitch: 1.27
PDIP16
  • JEDEC Reference: MS-001
  • MSL Pb-Free: n/a
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 69.9ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: n/a
  • Quantity per Tube: 25
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): n/a
  • Tape & Reel Unit Orientation: n/a
  • Dimensions: inch
  • Length: 0.75
  • Width: 0.25
  • Thickness: 0.13
  • Lead Pitch: 0.10
WSOIC16
  • JEDEC Reference: MS-013
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 69.1ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 47
  • Quantity per Reel: 1500
  • Quantity per Tube: 47
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 12
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 10.30
  • Width: 7.50
  • Thickness: 2.65
  • Lead Pitch: 1.27

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
SP232ECN NSOIC16 0 70 OBS Suggested:
SP232ECN-L
SP232ECN/TR NSOIC16 0 70 OBS Suggested:
SP232ECN-L/TR
SP232ECN-L NSOIC16 0 70 Active
SP232ECN-L/TR NSOIC16 0 70 Active
SP232ECP PDIP16 0 70 OBS
SP232ECP-L PDIP16 0 70 OBS Suggested:
SP232ECN-L/TR
SP232ECT WSOIC16 0 70 OBS Suggested:
SP232ECT-L
SP232ECT/TR WSOIC16 0 70 OBS Suggested:
SP232ECT-L/TR
SP232ECT-L WSOIC16 0 70 OBS Suggested:
SP232ECT-L/TR
SP232ECT-L/TR WSOIC16 0 70 Active
SP232EEN NSOIC16 -40 85 OBS Suggested:
SP232EEN-L
SP232EEN/TR NSOIC16 -40 85 OBS Suggested:
SP232EEN-L/TR
SP232EEN-L NSOIC16 -40 85 Active
SP232EEN-L/TR NSOIC16 -40 85 Active
SP232EEP PDIP16 -40 85 OBS Suggested:
SP232EEP-L
SP232EEP-L PDIP16 -40 85 OBS Suggested:
SP232EEN-L/TR
SP232EET WSOIC16 -40 85 OBS Suggested:
SP232EET-L
SP232EET/TR WSOIC16 -40 85 OBS Suggested:
SP232EET-L/TR
SP232EET-L WSOIC16 -40 85 OBS Suggested:
SP232EET-L/TR
SP232EET-L/TR WSOIC16 -40 85 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.

Quality Documents

Part NumberRoHSREACH
SP232ECN-LDownloadDownload
SP232ECP-LDownloadDownload
SP232ECT-LDownloadDownload
SP232EEN-LDownloadDownload
SP232EEP-LDownloadDownload
SP232EET-LDownloadDownload
Additional Quality Documentation may be available, please contact customersupport@exar.com.
Distribution Date Description File
11/15/2017 Fab transfer including re-design for new foundry process rules. Qualification of TSMC foundry for 0.25um HV20 process. Addendum: Corrected Change Category from Material, Process and Other to Design and Process. PCN 17-0208-02A-1033.PDF
08/10/2017 Qualification of alternate assembly subcon, ANST. PCN 17-0625-01 ANST-1033.pdf
08/07/2017 Fab transfer including re-design for new foundry process rules. Qualification of TSMC foundry for 0.25um HV20 process. PCN 17-0208-02 TSMC-1033.pdf
07/11/2017 Product Discontinuation Notification PDN_17-0626-02-1033.pdf
12/19/2016 Qualification of alternate assembly subcon, ANST, China. PCN 16-0835-04 ANST-1033.pdf
08/12/2016 Addition of an alternate qualified location, JCET, for assembly using copper wire bonding. PCN 16-0522-03 JCET-1033.pdf
11/16/2015 Updated information subsequent to original published PCN 15-0625-02 on 09/29/2015. Addendum: Update to package marking. PCN 15-0625-02A UPDATE-1033.pdf
09/29/2015 Greatek as alternate assembly site Addition of an alternate production site, Greatek, Taiwan for 16L, 24L and 28L SOICW PCN 15-0625-02 16L-24L-28L SOICW Greatek-1033.pdf
09/11/2015 Alternate assembly site Addition of an alternate assembly supplier Greatek in Taiwan. PCN 15-0625-04 Greatek-1033.pdf
01/27/2014 Addition of an alternate qualified 8, 14, 16, 40 PDIP assembly site, Greatek, Taiwan. Alternate assembly site. PCN 13-0834-02 Greatek 8-14-16-40 PDIP-1033.pdf
07/26/2013 5-inch wafer with PSG 10KÅ passivation Material and other (foundry 6 inch wafer qualification) changes. PCN_13-0507-02-1033.pdf
07/02/2013 Addition of an alternate qualified assembly supplier, Carsem (Malaysia) for 14 and 16 lead NSOIC package using copper wire bonding. Material change. PCN_13-0128-01-1033.pdf
09/24/2012 Material Change - Bond wire is changed from gold to copper. To update our manufacturing to be compatible with current industry standards and maintain capacity. PCN_12-0914-01-1033.pdf
01/26/2011 Use 6’’ production line in the Silan, China wafer fabrication. Capacity enhancement. PCN_11-0117-01-1033.pdf
12/07/2009 Enhancement of NSOIC 8, NSOIC14 and NSOIC16 packages to Green (halogen-free) via Mold Compound & Die Attach Material. Enhance packages to be Green (halogen-free). PCN_09-0911-01-1033.pdf
05/19/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand PDN 081126-01-1033.pdf
12/23/2008 ESD rating of +/- 15kV IEC 1000-4-2 Air Discharge and +/-8kV Contact Discharge are removed from the datasheets. Product re-characterization. PCN_08-1223-01-1033.pdf
11/26/2008 Notice of Obsolescence Package Discontinuation Notice PDN_081126-01-1033.pdf
09/29/2008 Product assembly of 14/16/18 lead PDIP families will be transferred from Unisem-Ipoh (Malaysia) to Unisem-Batam (Indonesia). Business consolidation and use of environmental friendly material. pcn08-0929-01-1033.pdf
04/04/2007 Power Management and Interface products as listed are being transferred to external wafer foundry, due to cessation of operations of the Sipex Hillview Wafer Fabrication manufacturing site. Updating previously announced transfer of certain Power Management and Interface Products from the Hillview wafer fabrication facility to wafer foundry Silan. PCN_07-0328-01-1033.pdf
05/08/2006 Announcing transfer of certain Power Management and Interface Products from Hillview fabrication facility to wafer foundary Episil. 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-06-0130-04b-1033.pdf
02/12/2006 Announcing transfer of certain Power Management and Interface Products from Hillview fabrication facility to wafer foundary Episil. 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-06-0130-04a-1033.pdf
02/02/2006 Announcing transfer of certain Power Management and Interface Products from Hillview wafer fabrication facility to wafer foundry Episil. 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-06-0130-04-1033.pdf

Frequently Asked Questions

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 two parts are identical and come from the same basic die. The reason for the part labeling is historical. Other suppliers had different part numbers for similar function and we wanted to second source both products with enhanced performance at the time.
RS-232 uses both positive and negative voltages for signaling. The RS-232 driver needs a charge pump circuit to generate these signal voltages from a single Vcc supply. Four capacitors are needed to generate the positive (V+ or Vdd) and negative (V- or Vss) voltages.
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.
RS232 is the most widely implemented serial interface in the world. It is commonly installed as the serial port (9 pin or 25 pin) on PCs and has become ubiquitous on literally thousands of other applications. See below for comparisons.
 
Even though RS232 is a very old standard (first standardized in 1962) it is still popular because it is:
- simple, no software stack required, can be used to bring-up microcontrollers or load firmware on a “bare” system
- inexpensive, standard products exist from multiple vendors
- widely understood, support is already built in to most microcontrollers, the basics of serial communication are in most of the textbooks
- performance is adequate for many applications, simple data transfer, text or console ports, diagnostics, peripheral connectivity, etc.
 
However RS232 does have some limitations:
- It is slow by modern standards. Typical data rates are 1200 baud, 9600 baud, 115.2kbaud. High data rate RS232 devices are available up to 1Mbps. Faster speeds are uncommon.
- Signals swing to both positive and negative voltage. This requires an onboard charge pump to generate signals from a single power-supply chip or else multiple positive and negative supply rails.
- High pin-count per function. All signals are unidirectional and the charge pump requires several pins and external capacitors. So small footprint is difficult to achieve. Cables and connectors use more pins and wires than most modern serial protocols.
- Point-to-point only. Signals go from one driver to one receiver. RS232 does not support bi-directional signals or multiple drivers or receivers.
- Limited distance. RS232 uses single-ended signals which makes it difficult to support long cables. Typical RS232 cables are only about 10 meter or less. High speed (1Mbps) are typically less than 1 meter. The wide driver signal swing makes crosstalk a problem. Unbalanced signals with a shared ground reference are less able to withstand ground shifts between driver and receiver.
- Comparatively high power consumption. The wide signal swing takes quite a bit of power. By the RS232, signals idle at mark-state and receivers have typical 5kΩ impedance to ground, therefore drivers are constantly sourcing current even while idle. Many later RS232 transceivers’ feature shutdown modes or automatic power saving features (such as Auto On-Line, Auto On-Line Plus, Intelligent charge pumps, etc.). However some of the most commoditized devices lack any shutdown function.
 
RS485 overcomes most of the limitations of RS232 and is an excellent complement to RS232.
- RS485 uses differential signaling and is capable of much higher data rates (up to 20Mbit/sec)
- Differential signals also allow RS485 to communicate over 1200 meter cable lengths. Longer runs are possible with some careful system optimization.
- Bi-directional and multi-drop operation. RS485 can be used to build multidrop networks with many transmitters and many receivers.
- Balanced differential signalling also makes RS485 highly immune to noise. On twisted-pair cables a noise signal will couple equally to both wires in the pair and be ignored by the differential receiver.
 
RS485 is found mainly in industrial, telecom and commercial applications and is not as widespread in the consumer
or PC world. Therefore it is not seen as often as RS232.
 
Also the RS485 protocol standard defines only the electrical characteristics of the interface. The physical and logical implementations are left up to the user. Different connectors, different methods for bus-arbitration and data framing all exist under a wide variety of implementations. RS485 has also been used as the foundation for many proprietary or semi-proprietary standards. Therefore interoperability between RS485 based interfaces is not always as simple as with RS232.
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 exar.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. When you hover over it, it will turn grey and you can click anywhere in the grey box. This brings you to the product page. For example:

 
 

Click on Parts & Purchasing, highlighted in yellow 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:

 
 

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

 

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.

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