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CAT823 Datasheet(PDF) 4 Page - ON Semiconductor

No. de pieza CAT823
Descripción Electrónicos  System Supervisory Voltage Reset
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
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CAT823 Datasheet(HTML) 4 Page - ON Semiconductor

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CAT823, CAT824, CAT825
http://onsemi.com
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Table 3. ELECTRICAL OPERATING CHARACTERISTICS (DC Characteristics: VCC = 3.0 V to 5.5 V for L/M versions;
VCC = 2.0 V to 3.6 V for the R/S/T/U/Y/Z version, −40°C ≤ TA ≤ +85°C unless otherwise noted. Typical Values at TA = 25°C and VCC = 5 V
for L/M versions; VCC = 3.3 V for the T/S versions; VCC = 3.0 V for the R version; and VCC = 2.5 V for the U/Y/Z versions.) (Note 1)
Symbol
Units
Max
Typ
Min
Conditions
Parameter
WATCHDOG INPUT (CAT823 & CAT824)
tWD
Watchdog Timeout Period
1.12
1.60
3.20
s
tWDI
WDI Pulse Width
VIL = 0.4 V, VIH = 0.8 x VCC
50
ns
VIL
WDI Input Voltage (Note 3)
0.3 x VCC
V
VIH
0.7 x VCC
WDI Input Current (Note 4)
WDI = VCC, Time Average
120
160
mA
WDI = 0 V, Time Average
−20
−15
MANUAL RESET INPUT (CAT823 & CAT825)
VIL
MR Input Voltage
0.3 x VCC
V
VIH
0.7 x VCC
tPB
MR Pulse Width
1
ms
tPDLY
MR low to Reset Delay
5
ms
MR Noise Immunity
Pulse Width with No Reset
100
ns
MR Pullup Resistance
(internal)
35
52
75
kW
1. Over−temperature limits are guaranteed by design and not production tested.
2. The RESET short−circuit current is the maximum pull−up current when reset is driven low by a bidirectional output.
3. WDI is internally serviced within the watchdog period if WDI is left open.
4. The WDI input current is specified as an average input current when the WDI input is driven high or low. The WDI input if connected to
a three−stated output device can be disabled in the tristate mode as long as the leakage current is less than 10 mA and a maximum capacitance
of less than 200 pF. To clock the WDI input in the active mode the drive device must be able to source or sink at least 200 mA when active.
TYPICAL ELECTRICAL OPERATING CHARACTERISTICS
Figure 2. VCC Supply Current vs. Temperature
Figure 3. Normalized Reset Threshold Voltage
vs. Temperature
TEMPERATURE (°C)
TEMPERATURE (°C)
120
80
60
40
20
0
−20
−40
1
2
3
4
6
7
8
9
100
80
60
40
20
0
−20
−40
0.94
0.96
0.98
1.00
1.02
1.04
1.06
100
5


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