ESDAXXSC5 Datasheet, PDF (5/7 Pages) STMicroelectronics – QUAD TRANSIL ARRAY FOR ESD PROTECTION

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.
ESDAxxSC5 / ESDAxxSC6
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.
Surface mount TVS arrays offer the best choice for
minimal lead inductance.
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 The path length between the ESD suppressor
and the protected line should be minimized
n All conductive loops, including power and
ground loops should be minimized
n The ESD transient return path to ground should
be kept as short as possible.
n Ground planes should be used whenever possi-
ble.
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