1.1 General description
The IP4234CZ6 is designed to protect Input/Output (I/O) USB 2.0 ports, that are sensitive
to capacitive loads, from being damaged by ElectroStatic Discharge (ESD). The π-
filter structure is implemented with a small series resistor to provide the necessary
protection to signal and supply components from ESD voltages greater than ±8 kV
contact discharge according IEC 61000-4-2, level 4.
The ESD protection is independent of the supply voltage due to the rail-to-rail diode
architecture being connected to a Zener diode.
The IP4234CZ6 is fabricated using monolithic silicon technology and integrates two ultralow
capacitance π-filter ESD protection diodes plus a Zener diode in a miniature 6-lead
SOT457 package.
1.2 Features
• Pb-free and RoHS compliant
• Simple, direct signal routing provides for high speed signal integrity
• ESD protection compliant to IEC 61000-4-2 level 4, ±8 kV contact discharge
• Four low input capacitance (3.1 pF typical) rail-to-rail ESD protection diodest
• Low voltage clamping due to an integrated Zener diode
• Small 6-lead SO6 (SOT457) package
• IEC 61000-4-5 15 A Lightning (8/20 μs) compliant
1.3 Applications
• General-purpose downstream ESD protection high frequency analog signals and highspeed
serial data transmission for ports inside:
– Cellular and PCS mobile handsets
– PC/Notebook USB2.0/IEEE1394 ports
– DVI interfaces
– HDMI interfaces
– Cordless telephones
– Wireless data (WAN/LAN) systems
– PDAs