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| 型号： | MAX6808US26+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/13页 |
| 文件大小： | 0K |
| 描述： | IC VOLT DETECTOR 2.3V SOT143-4 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 标准为 30 µs |
| 电压 - 阀值： | 2.6V |
| 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-143-4 |
| 包装： | 带卷 (TR) |
Voltage Detectors
Applications Information
Negative-Going V CC Transients
In addition to asserting a reset signal during power-up,
power-down, and brown-out conditions, the MAX6806/
MAX6807/MAX6808 are immune to short-duration, neg-
ative-going V CC transients.
Figure 3 displays typical transient durations vs. reset-
comparator overdrive for which the MAX6806/MAX6807/
MAX6808 do not generate a reset pulse. The graph was
generated using a negative-going pulse applied to V CC ,
starting 0.5V above the actual reset threshold and end-
ing below it by the magnitude indicated (reset-compara-
tor overdrive). The graph indicates the maximum pulse
width a negative-going V CC transient can have without
causing a reset pulse. As the magnitude of the transient
increases (goes further below the reset threshold), the
maximum allowable pulse width decreases. A 0.1μF
capacitor mounted as close as possible to V CC pro-
vides additional transient immunity.
80
T A = +25 ° C
Ensuring a Valid Reset Output Down to
V CC = Ground
When V CC falls below 1V, the MAX6806/MAX6808
RESET output no longer sinks current—it becomes an
open circuit. Therefore, high-impedance CMOS logic
inputs connected to RESET can drift to undetermined
voltages. This presents no problem in most applica-
tions, since most circuitry is inoperative when V CC is
below 1V. In applications where RESET must be valid
down to ground, add a pull-down resistor to RESET so
any stray leakage currents flow to ground, holding
RESET low (Figure 4). Select R1 to be large enough not
to load RESET and small enough to pull RESET to
ground. For most applications, 100k ? will not load
RESET and will pull RESET to ground. Similarly, if
RESET (MAX6807) must be valid below 1.2V, add a
pull-up resistor to RESET.
70
V CC
V CC
60
R1
50
MAX6806
MAX6807
100k ?
40
30
MAX680
46
RESET
RESET
R1
20
100k ?
10
100
1000
GND
GND
RESET COMPARATOR OVERDRIVE, V TH- - V CC (mV)
Figure 3. Maximum Transient Duration without Causing a
Reset Pulse vs. Reset Comparator Overdrive
Figure 4. RESET / RESET Valid to V CC = Ground Circuit
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6808US32 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6808US32-T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6808US46 | 制造商:Maxim Integrated Products 功能描述:VOLTAGE DETECTOR WITH ACTIVE-LOW OP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX6808US46+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR DETECT 4.6V 4PIN SOT-143 - Cut Tape Product |
| MAX6808US46+T | 功能描述:监控电路 Single uPower 4.6V 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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