CAT811LEUS-T Catalyst / ON Semiconductor, CAT811LEUS-T Datasheet - Page 6
![Supervisory Circuits 4.63V Push-Pull Low](/photos/36/39/363961/sot143_sml.jpg)
CAT811LEUS-T
Manufacturer Part Number
CAT811LEUS-T
Description
Supervisory Circuits 4.63V Push-Pull Low
Manufacturer
Catalyst / ON Semiconductor
Datasheet
1.CAT811STBI-GT3.pdf
(11 pages)
Specifications of CAT811LEUS-T
Number Of Voltages Monitored
1
Monitored Voltage
2.5 V, 3 V, 3.3 V, 5 V
Output Type
Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
240 ms
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.2 V
Supply Current (typ)
8 uA
Maximum Power Dissipation
320 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-143-4
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Undervoltage Threshold
4.56 V
Overvoltage Threshold
4.7 V
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
CAT811, CAT812
DETAILED DESCRIPTION
RESET TIMING
The reset signal is asserted LOW for the CAT811 and
HIGH for the CAT812 when the power supply voltage
falls below the threshold trip voltage and remains
asserted for at least 140ms after the power supply
voltage has risen above the threshold.
V
The CAT811/812 protect µPs against brownout
failure. Short duration transients of 4µs or less and
100mV amplitude typically do not cause a false
RESET.
Figure 2 shows the maximum pulse duration of
negative-going V
reset condition.
Doc. No. MD-3005 Rev. V
CC
TRANSIENT RESPONSE
Voltage
RESET
RESET
Supply
Power
CC
transients that do not cause a
5V
0V
5V
0V
5V
0V
Figure 2. Maximum Transient Duration without Causing a
Reset Pulse vs. Reset Comparator Overdrive
30
25
20
15
10
Figure 1. Reset Timing Diagram
5
0
1
RESET OVERDRIVE V
CAT8xxM
10
6
As the amplitude of the transient goes further below
the threshold (increasing V
pulse duration decreases. In this test, the V
from an initial voltage of 0.5V above the threshold and
drops below it by the amplitude of the overdrive
voltage (V
T
100
TH
AMB
CAT8xxZ
Threshold
- V
Voltage
CC
= 25°C
TH
(mV)
- V
CC
1000
).
minimum
140ms
Reset Timeout Period
Characteristics subject to change without notice
TH
- V
© 2010 SCILLC. All rights reserved.
CAT812
CAT811
CC
), the maximum
CC
starts