Datasheet

IO3 IO4
GND
IO2IO1
V
CC
TPD4E001
SLLS682K –JULY 2006–REVISED JANUARY 2015 www.ti.com
7 Detailed Description
7.1 Overview
The TPD4E001 is a four-channel Transient Voltage Suppressor (TVS) based Electrostatic Discharge (ESD)
protection diode array. The TPD4E001 is rated to dissipate ESD strikes at the maximum level specified in the
IEC 61000-4-2 international standard (Level 4). This device has a 1.5-pF IO capacitance per channel, making it
ideal for use in high-speed data IO interfaces. The ultra low leakage current ( < 1 nA maximum) is suitable for
precision analog measurements in applications like glucose meters and heart rate monitors.
7.2 Functional Block Diagram
7.3 Feature Description
TPD4E001 is a uni-directional ESD protection device with low capacitance. The device is constructed with a
central ESD clamp that features two hiding diodes per line to reduce the capacitive loading. This central ESD
clamp is also connected to V
CC
to provide protection for the V
CC
line. Each IO line is rated to dissipate ESD
strikes above the maximum level specified in the IEC 61000-4-2 level 4 international standard. The TPD4E001's
low loading capacitance makes it ideal for protection high-speed signal terminals.
7.4 Device Functional Modes
TPD4E001 is a passive-integrated circuit that activates whenever voltages above V
BR
or below the lower diodes
V
forward
(–0.6V) are present upon the circuit being protected. During ESD events, voltages as high as ±15 kV can
be directed to ground and V
CC
via the internal diode network. Once the voltages on the protected lines fall below
the trigger voltage of the TPD4E001 (usually within 10's of nano-seconds) the device reverts back to a high-
impedance state.
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