PDN27A90

With VDD connected to the positive rail and VSS connected to the negative rail of a power supply and the lines from an intergrated circuit to be protected from ESD discharges connected to the outputs of the PDN27A90/91,and the inputs of the PDN 27A90/91 connected to an external connector, this IC will effectively protect the other IC from ESD discharges up to 10 kV(human body model,100pF through 1.5 kohms MIL-STD-883), which also includes prevention of ESD induced latch-up.The CMD PDN 27A90/91 9/10 channel live ESD protection array will also present a low pass filter to the signal coming from the logic circuitry to the connector which attenuates or eliminates the high frequency components (EM/RFI). In which case only the negative rail,e.g.ground , is accessible for the PDN 27A90/91, the use of a single,discrete zener diode form the VDD pin to the VSS pin will effectively replace the positive supply and protect the driver chip from positive ESD discharge as well.

PDN27A90 has two unique features: The first one is live ESD protection which is up to 10kV. The second one is EFI noise filter for very high frequencies. Besides, there are also three applications about PDN27A90. The first one is EMI/RFI filtering. The second one is protection of sensitive devices against latch-up. The third one is protection of IC terminals which are exposed to ESD discharge during operation.

There are also some absolute maximum ratings about PDN27A90.SUpply voltage(VDD-GND) is V-0.3 V to +7 V. DC-voltage at any channel input(VIH) is -5 V to VDD +5 V.DC-voltage at any channel output(Vout) is -0.8 V to VDD +0.8 V.Channel clamp current(continuous)(Iin) is ±50 mA.Power dissipation is 600 mW when IF is not larger than 50 mA /channel and Ta is 75.Operating temperature range(Ta) is -65 to +150.Storage temperature(Tstg) is 0 to 70.Package power rating is 1.00W, max.Meanwhile,there are also some electrical characteristics about it when Ta is 0 to 70.Resistance(IN-OUT) is 100 ohms typ.Channel leakage is 100 nA typ when Vin is between 0 and VDD.Output capacitance is 8pF typ when Vout is 0 V.

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