CAT811JEUS-T Catalyst / ON Semiconductor, CAT811JEUS-T Datasheet - Page 6

• Manufacturer Part Number: CAT811JEUS-T
• Description: Supervisory Circuits 4V Push-Pull Low
• Manufacturer: Catalyst / ON Semiconductor

Specifications of CAT811JEUS-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: 3.93 V
• Overvoltage Threshold: 4.06 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