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參數資料
| 型號： | CAT812ZTBI-GT3 |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| 封裝： | GREEN, TO-253, SOT-143, 4 PIN |
| 文件頁數： | 8/11頁 |
| 文件大?。?/td> | 222K |
| 代理商： | CAT812ZTBI-GT3 |
CAT811, CAT812
Doc. No. MD-3005 Rev. S
6
Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
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.
Figure 1. Reset Timing Diagram
VCC TRANSIENT RESPONSE
The CAT811/812 protect Ps against brownout
failure. Short duration transients of 4s or less and
100mV amplitude typically do not cause a false
RESET.
Figure 2 shows the maximum pulse duration of
negative-going VCC transients that do not cause a
reset condition.
As the amplitude of the transient goes further below
the threshold (increasing VTH - VCC), the maximum
pulse duration decreases. In this test, the VCC starts
from an initial voltage of 0.5V above the threshold and
drops below it by the amplitude of the overdrive
voltage (VTH - VCC).
Figure 2. Maximum Transient Duration without Causing a
Reset Pulse vs. Reset Comparator Overdrive
30
25
20
15
10
5
0
TRANS
IE
N
TDU
RA
TI
O
N
(s
)
RESET OVERDRIVE VTH - VCC (mV)
1
10
100
1000
TAMB = 25°C
CAT8xxM
CAT8xxZ
5V
0V
5V
0V
5V
0V
CAT811
CAT812
Threshold
Voltage
140ms
minimum
Reset Timeout Period
Power
Supply
Voltage
RESET
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相關代理商/技術參數 |
參數描述 |
|---|---|
| CAT812ZTBI-T | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors |
| CAT812ZTBIT10 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset |
| CAT812ZTBI-T10 | 功能描述:監(jiān)控電路 2.32V Push-Pull High RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| CAT812ZTBIT3 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset |
| CAT812ZTBI-T3 | 功能描述:監(jiān)控電路 2.32V Push-Pull High RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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