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TLV840 Datasheet(PDF) 13 Page - Texas Instruments

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Part # TLV840
Description  TLV840-Q1 Nano-Power Voltage Supervisor with Adjustable Reset Time Delay
PDF  32 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TLV840 Datasheet(HTML) 13 Page - Texas Instruments

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8.3.1.1 VDD Hysteresis
The internal comparator has built-in hysteresis to avoid erroneous output reset release. If the voltage at the VDD
pin falls below VIT- the output reset is asserted. When the voltage at the VDD pin goes above VIT- plus hysteresis
(VHYS) the output reset is deasserted after tD delay.
VDD
Hystersis Width
VIT+
VIT-
RESET
RESET
VDD
Hystersis Width
VIT+
VIT-
Figure 8-1. Hysteresis Diagram
8.3.1.2 VDD Transient Immunity
The TLV840-Q1 is immune to quick voltage transients or excursion on VDD. Sensitivity to transients depends
on both pulse duration (tGI_VIT-) found in Section 7.6 and overdrive. Overdrive is defined by how much VDD
deviates from the specified threshold. Threshold overdrive is calculated as a percent of the threshold in question,
as shown in Equation 1.
Overdrive = | [(VDD / VIT-) – 1] × 100% |
(1)
Overdrive
Pulse
Duration
VDD
V
IT-
V
IT+
Figure 8-2. Overdrive vs Pulse Duration
www.ti.com
TLV840-Q1
SNVSBY3A – NOVEMBER 2020 – REVISED APRIL 2021
Copyright © 2021 Texas Instruments Incorporated
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