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TPS3828 Datasheet(PDF) 7 Page - Texas Instruments

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Part # TPS3828
Description  Voltage Monitor With Watchdog Timer
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS3828 Datasheet(HTML) 7 Page - Texas Instruments

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V
IT-
V
DD
RESET
WDI
t
d
t
d
t
t(out)
t
d
undefined
undefined
1.1 V
TPS3820, TPS3823, TPS3823A, TPS3824, TPS3825, TPS3828
www.ti.com
SLVS165K – APRIL 1998 – REVISED NOVEMBER 2015
Electrical Characteristics (continued)
over operating junction temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TPS382x-25
TPS382x-30
–400
Output short-circuit
IOS
RESET
VDD = VIT, max + 0.2 V, VO = 0 V
µA
TPS382x-33
current(3)
TPS382xA-33
TPS382x-50
–800
IDD
Supply current
WDI, MR, and outputs unconnected
15
25
µA
Internal pullup resistor at MR
52
k
Ω
Ci
Input capacitance at MR, WDI
VI = 0 V to 5.5 V
5
pF
(3)
The RESET short-circuit current is the maximum pullup current when RESET is driven low by a microprocessor bidirectional reset pin.
7.6 Timing Requirements
At RL = 1 MΩ, CL = 50 pF, and TJ = 25°C, unless otherwise noted.
MIN
TYP
MAX
UNIT
at VDD
VDD = VIT− + 0.2 V, VDD = VIT– – 0.2 V
6
μs
tw
Pulse width
at MR
VDD ≥ VIT− + 0.2 V, VIL = 0.3 × VDD, VIH = 0.7 × VDD
1
μs
at WDI
VDD ≥ VIT− + 0.2 V, VIL = 0.3 × VDD, VIH = 0.7 × VDD
100
ns
7.7 Switching Characteristics
At RL = 1 MΩ, CL = 50 pF, and TJ = 25°C, unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TPS3820
112
200
300
ms
VDD ≥ VIT− + 0.2 V
ttout
Watchdog time out
See Figure 1
TPS3823/4/8, TPS3823A
0.9
1.6
2.5
s
TPS3820
15
25
37
VDD ≥ VIT− + 0.2 V
td
Delay time
ms
See Figure 1
TPS3823/4/5/8, TPS3823A
120
200
300
VDD ≥ VIT− + 0.2 V,
MR to RESET delay
VIL = 0.3 × VDD,
0.1
(TPS3820/3/5/8, TPS3823A)
Propagation (delay) time,
VIH = 0.7 × VDD
tPHL
µs
high-to-low-level output
VIL = VIT– – 0.2 V,
VDD to RESET delay
25
VIH = VIT– + 0.2 V
VDD ≥ VIT− + 0.2 V,
MR to RESET delay (TPS3824/5)
VIL = 0.3 × VDD,
0.1
Propagation (delay) time,
VIH = 0.7 × VDD
tPLH
µs
low-to-high-level output
VIL = VIT– – 0.2 V,
VDD to RESET delay (TPS3824/5)
25
VIH = VIT– + 0.2 V
Figure 1. Timing Diagram
Copyright © 1998–2015, Texas Instruments Incorporated
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Product Folder Links: TPS3820 TPS3823 TPS3824 TPS3825 TPS3828


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