CAT809ZEUR-T Catalyst / ON Semiconductor, CAT809ZEUR-T Datasheet - Page 7

Supervisory Circuits 2.32V Push-Pull Low

CAT809ZEUR-T

Manufacturer Part Number
CAT809ZEUR-T
Description
Supervisory Circuits 2.32V Push-Pull Low
Manufacturer
Catalyst / ON Semiconductor
Datasheet

Specifications of CAT809ZEUR-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
Not 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)
6 uA
Maximum Power Dissipation
320 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-23-3
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Undervoltage Threshold
2.28 V
Overvoltage Threshold
2.35 V
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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V
The CAT809/810 protect µPs against brownout failure.
Short duration transients of 4µsec or less and 100 mV
amplitude typically do not cause a false RESET.
Figure 2 shows the maximum pulse duration of negative-
going V
DETAILED DESCRIPTIONS
RESET TIMING
The reset signal is asserted LOW for the CAT809 and
HIGH for the CAT810 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.
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CC
Figure 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive
TRANSIENT RESPONSE
CC
Voltage
RESET
RESET
Supply
Power
transients that do not cause a reset condition.
5V
0V
5V
0V
5V
0V
30
25
20
15
10
5
0
Figure 1. Reset Timing Diagram
1
RESET OVERDRIVE V TH - V CC [mV]
CAT809M
10
7
T AMB = 25°C
100
As the amplitude of the transient goes further below the
threshold (increasing V
duration decreases. In this test, the V
initial voltage of 0.5V above the threshold and drops
below it by the amplitude of the overdrive voltage (V
V
CAT809Z
CC
Threshold
).
Voltage
1000
minimum
140ms
Reset Timeout Period
TH
- V
CC
), the maximum pulse
CAT803/CAT809
CAT810
CAT809, CAT810
CC
starts from an
Doc No. 3004, Rev. Q
TH
-

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