SGLS297A − FEBRUARY 2005 − REVISED JUNE 2008
USB PORT TRANSIENT SUPPRESSORS
D Qualified for Automotive Applications
D Design to Protect Submicron 3-V or 5-V
Circuits from Noise Transients
D Port ESD Protection Capability Exceeds:
− 15-kV Human Body Model
− 2-kV Machine Model
D Available in a WCSP Chip-Scale Package
D Stand-Off Voltage . . . 6 V Min
D Low Current Leakage . . . 1 µA Max at 6 V
D Low Capacitance . . . 35 pF Typ
D USB 1.1 Host, Hub, or Peripheral Ports
The SN65220 is a single transient voltage suppressor
designed to provide electrical noise transient protection to
universal serial bus (USB) 1.1 ports. Note that the input
capacitance of the device makes it unsuitable for
high-speed USB 2.0 applications.
Any cabled I/O can be subjected to electrical noise
transients from various sources. These noise transients
can cause damage to the USB transceiver and/or the USB
ASIC if they are of sufficient magnitude and duration.
USB ports are typically implemented in 3-V or 5-V digital
CMOS with limited ESD protection. The SN65220 can
significantly increase the port ESD protection level and
reduce the risk of damage to the circuits of the USB port.
The IEC1000-4-2 ESD performance of the SN65220 is
measured at the system level. Therefore, system design
impacts the results of these tests. A high compliance level
may be attained with proper board design and layout.
NC 1 6 A
GND 2 5 GND
NC 3 4 B
NC − No internal connection
†When read horizontally, pin 1 is the bottom left pin.
CURRENT vs VOLTAGE
Voltage − V
NOTE A: Typical current versus voltage curve was derived
using the IEC 1.2/50-µs surge waveform.
EQUIVALENT SCHEMATIC DIAGRAM
A or C
B or D
(One Suppressor Shown)
NOTE: All GND terminals should be connected to ground.
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PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2008 Texas Instruments Incorporated