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参数资料
| 型号： | CAT811TTBI-GT10 |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| 封装： | GREEN, TO-253, SOT-143, 4 PIN |
| 文件页数： | 8/11页 |
| 文件大小： | 222K |
| 代理商： | CAT811TTBI-GT10 |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT811TTBIGT3 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset |
| CAT811TTBI-GT3 | 功能描述:监控电路 Act. Lo w/PB 4-pin RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| CAT811TTBI-T | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors |
| CAT811TTBIT10 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset |
| CAT811TTBI-T10 | 功能描述:监控电路 3.08V Push-Pull Low RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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