參數(shù)資料
型號： CAT812LTBIT3
英文描述： 4-Pin Microprocessor Power Supply Supervisors with Manual Reset
中文描述： 4引腳微處理器電源監(jiān)控器，帶有手動復位
文件頁數(shù)： 6/9頁
文件大小： 101K
代理商： CAT812LTBIT3
CAT811, CAT812
6
Doc. No. 3005, Rev. R
2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
DETAILED DESCRIPTIONS
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
Figure 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive
30
25
20
15
10
5
0
T
μ
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
RESET
V
CC
TRANSIENT RESPONSE
The CAT811/812 protect
μ
Ps against brownout failure.
Short duration transients of 4
μ
sec or less and 100 mV
amplitude typically do not cause a false RESET.
Figure 2 shows the maximum pulse duration of negative-
going V
CC
transients that do not cause a reset condition.
As the amplitude of the transient goes further below the
threshold (increasing V
TH
- V
CC
), the maximum pulse
duration decreases. In this test, the V
CC
starts from an
initial voltage of 0.5V above the threshold and drops
below it by the amplitude of the overdrive voltage (V
TH
- V
CC
).
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相關代理商/技術參數(shù)
參數(shù)描述
CAT812LTBI-T3 功能描述:監(jiān)控電路 4.63V Push-Pull High RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 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
CAT812M 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset
CAT812MEUSGT10 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset
CAT812MEUSGT3 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset
CAT812MEUS-T 功能描述:監(jiān)控電路 4.38V Push-Pull High RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 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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