TPD4E001_16 Datasheet, PDF (8/28 Pages) Texas Instruments – Low-Capacitance 4-Channel ESD-Protection for High-Speed Data Interfaces

TPD4E001
SLLS682L – JULY 2006 – REVISED MAY 2016
7 Detailed Description
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7.1 Overview
The TPD4E001 is a four-channel transient voltage suppressor (TVS) based 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
V_CC
IO1 IO2
IO3 IO4
GND
7.3 Feature Description
The 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
The 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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