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参数资料
| 型号： | CAT812TTBI-T3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 6/9页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU 3.08V SOT143-4 |
| 标准包装： | 1 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 高有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 3.08V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-253-4，TO-253AA |
| 供应商设备封装： | SOT-143 |
| 包装： | 标准包装 |
| 其它名称： | CAT812TTBI-T3DKR |
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 140 ms after the power supply voltage has risen above the threshold.
5V
Threshold
Voltage
V CC
0V
Reset
CAT811
CAT812
RESET
RESET
5V
0V
V CC
0V
140 ms
minimum
Timeout Period
Figure 6. Reset Timing Diagram
V CC Transient Response
The CAT811/812 protect m Ps against brownout failure.
Short duration transients of 4 m s or less and 100 mV
amplitude typically do not cause a false RESET.
Figure 7 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 0.5 V above the threshold and drops below
it by the amplitude of the overdrive voltage (V TH ? V CC ).
30
T AMB = 25 ° C
Valid Reset with V CC under 1.0 V
To ensure that the CAT811 RESET pin is in a known state
when V CC is under 1.0 V, a 100 k W pull ? down resistor
between RESET pin and GND is recommended; the value
is not critical. For the CAT812, a pull ? up resistor from
RESET pin to V CC is needed.
Power
Supply
V CC
CAT811
MR RESET
25
20
CAT8xxZ
GND
100 k W
15
10
5
CAT8xxM
Figure 8. RESET Valid with V CC Under 1.0 V
Power
Supply
0
1
10 100
RESET OVERDRIVE V TH ? V CC (mV)
1000
V CC
CAT812
100 k W
Figure 7. Maximum Transient Duration without
Causing a Reset Pulse vs. Reset Comparator
Overdrive
MR
RESET
GND
Figure 9. RESET Valid with V CC Under 1.1 V
http://onsemi.com
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT812Z | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors |
| CAT812ZEUSGT10 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset |
| CAT812ZEUSGT3 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset |
| CAT812ZEUS-T | 功能描述:监控电路 2.32V Push-Pull High 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 |
| CAT812ZEUST10 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:4-Pin Microprocessor Power Supply Supervisors with Manual Reset |
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