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RS232/422 ESD Protection

Murat Celebi
Prodigy 50 points
Other Parts Discussed in Thread: TPD2E007, TPD4E6B06, TPD4E02B04, TPD4E101, TPD1E10B09, TPD4E1B06, TPD2E1B06, TPD1E6B06, TPD1E10B06

I use Multiprotocol R232/RS422 Transciever. Transciver has RS232_TX, RS232_RX, RS422_TX_P, RS422_TX_N, RS422_RX_P and RS422_RX_N.  I want to protect these signal against ESD to using only single ESD Protection Chip.  TI advise TPD2E007 for RS232/RS485/RS422. TPD2E007 protect only two signal. I have to use three TPD2E007 with my single  multiprotocol Transciever to esd protection.  Also  I am using  12 multiprotocol  transciever on PCB Board. So I have to use 36 TPD2E007. I didtn't see RS232/422/485 expression  in application area of multichannel ESD protection product datasheets.

Could you advise me multichannel ESD Protection chip like TPD2E007 structural design(bidirectional TVS etc.)? 

Can I use TPD4E02B04, TPD4E6B06 and TPD4E101 products  for RS232/422 ESD protection?

  • 0
    TI__Genius 12190 points

    Murat,

    Looking at the allowable voltage ranges for the different protocols:

    SPECIFICATIONS RS232 RS423 RS422 RS485
    Mode of Operation SINGLE SINGLE DIFFERENTIAL DIFFERENTIAL
    -ENDED -ENDED
    Maximum Driver Output Voltage +/-25V +/-6V -0.25V to +6V -7V to +12V
    Receiver Input Voltage Range +/-15V +/-12V -10V to +10V -7V to +12V

    we have the following devices with breakdown voltages that can support some of these protocols:

    Part Number Number of Channels (#) Breakdown Voltage (Min) (V)
    TPD2E007 2 14
    TPD1E10B09 1 9.5
    TPD4E1B06 4 7
    TPD2E1B06 2 6.5
    TPD2E1B06 2 6.5
    TPD1E6B06 1 6
    TPD1E10B06 1 6
    TPD4E101 4 6

    Please let us know if you have any questions.

    Regards,