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参数资料
| 型号： | MIC6315-46D4UY TR |
| 厂商： | Micrel Inc |
| 文件页数： | 5/6页 |
| 文件大小： | 0K |
| 描述： | IC RESET GEN 4.63V VTH 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： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 1.1 s |
| 电压 - 阀值： | 4.63V |
| 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 |
| 产品目录页面： | 1113 (CN2011-ZH PDF) |
| 其它名称： | 576-2895-6 |
+3.3V
MIC6315
Applications Information
Microprocessor Reset
The /RESET pin is asserted whenever V CC falls below the
reset threshold voltage or if /MR (manual reset) is forced
low. The /RESET pin remains asserted for the duration of
the reset timeout period after V CC has risen above the reset
threshold or /MR has returned high. The reset function en-
sure the microprocessor is properly reset and powers up in
a known condition after a power failure. /RESET will remain
valid with V CC as low as 1V.
The /RESET output is a simple open-drain N-channel MOS-
FET structure. A pull-up resistor must be used to pull this
output up to some voltage. For most applications, this volt-
age will be the same power supply that supplies V CC to the
MIC6315. It is possible, however, to tie this resistor to some
other voltage. This will allow the MIC6315 to monitor one
voltage while level-shifting the /RESET output to some other
voltage. The pull-up voltage must be limited to 6.0V or less
(absolute maximum) to avoid damage to the MIC6315. The
resistor must be small enough to supply current to the inputs
and leakage paths that are driven by the /RESET output.
/RESET Valid at Low Voltage
As V CC drops to 0V, the MIC6315 will no longer be able to
pull the /RESET output low. At this point, the pull-up resistor
will pull the output high. The value of the pull-up resistor and
the voltage it is connected to will affect the point at which
this happens.
Micrel
Wire OR'ing The /RESET Output
Because the RESET output is open-drain, several reset
sources can be wire-ORed, in parallel, to allow resets from
multiple sources.
V CC Transients
The MIC6315 is relatively immune to negative-going V CC
glitches below the reset threshold. Typically, a negative-going
transient 125mV below the reset threshold with a duration of
20μs or less will not cause an unwanted reset. If additional
transient immunity is needed, a bypass capacitor can be
placed a close as possible to the MIC6315.
+5.0V
VCC VCC
10k
MIC6315 5V SYSTEM
RESET RESET
MR
MIC6315 Used in a Multiple Supply System
September 2008
5
M9999-091608
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