ESDAxxSC5 / ESDAxxSC6
ESD protection by ESDAXXXSCX
Electrostatic discharge (ESD) is a major cause of
failure in electronic systems.
Transient Voltage Suppressors (TVS) are an ideal
choice for ESD protection. They are capable of
clamping the incoming transient overvoltage to a
low enough level such that damage to the
protected semiconductor is prevented.
Surface mount TVS arrays offer the best choice for
minimal lead inductance.
They serve as parallel protection elements,
connected between the signal line and ground. As
the transient rises above the operating voltage of
the device, the TVS array becomes a low
impedance path diverting the transient current to
ground.
I/ O LINES
ESD
sensitive
device
GND
ESDA6V1SC6
(1connection to GND for ESDAxxSC5)
The ESDAxxSCx array is the ideal board level
protection of ESD sensitive semiconductor
components.
The tiny SOT23-5L and SOT23-6L packages allow
design flexibility in the high density boards where
the space saving is at a premium. This enables to
shorten the routing and contributes to hardening
against ESD.
ADVICE FOR OPTIMIZING CIRCUIT BOARD
LAYOUT
Circuit board layout is a critical design step in the
suppression of ESD induced transients. The
following guidelines are recommended :
n
The ESDAxxSC5/6 should be placed as close as
possible to the input terminals or connectors.
n
n
n
n
The path length between the ESD suppressor
and the protected line should be minimized
All conductive loops, including power and
ground loops should be minimized
The ESD transient return path to ground should
be kept as short as possible.
Ground planes should be used whenever possi-
ble.
5/7
STMICROELECTRONICS [ STMICROELECTRONICS ]
