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參數(shù)資料
| 型號(hào)： | AAT3527ICX-232-200-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | MicroPower Supervisory Circuit with Manual Reset |
| 中文描述： | 微功耗監(jiān)控電路，帶有手動(dòng)復(fù)位 |
| 文件頁(yè)數(shù)： | 7/10頁(yè) |
| 文件大?。?/td> | 223K |
| 代理商： | AAT3527ICX-232-200-T1 |
Applications Information
Reset Output Options
The AAT3528 has an active low open drain output
and the AAT3526/7 have a push-pull output. The
AAT3528 may be used in multiple voltage systems,
with an external pull-up resistor. This allows the
AAT3528 to interface to microprocessors with high-
er supply voltages up to 5.5V (Figure 2). In the
event of a power down or brown-out condition the
reset signal remains valid until the V
CC
drops below
1.2V. To ensure validity down to ground an external
100k
resistor should be connected between the
RESET output and GND.
Manual Reset Input
A logic low signal on MR asserts a reset condition.
Reset continues to be asserted as long as MR is low
and for a minimum of 150ms after MR returns high.
This input is internally pulled up to V
CC
via a 20k
resistor, so leaving the pin unconnected is accept-
able if manual reset function is not needed. The MR
input is internally debounced which allows use of a
mechanical switch. It should be a normally-open
momentary switch connected from MR to GND.
Additionally, the MR pin can be driven from TTL,
CMOS, or open drain logic outputs.
Supply Voltage Transient Behavior
In some cases fast negative transients of short dura-
tion can appear on the V
CC
power supply. The
AAT3526/7/8 series devices provide some immunity
to line transients which can generate invalid reset
pulses. Figure 1 shows typical behavior to short
duration pulses verses RESET comparator over-
drive. As shown in the Maximum Transient Duration
vs. Reset Threshold Overdrive graph, when the
transient voltage becomes larger, the time allowed
before asserting a reset becomes shorter. e.g. typi-
cally a transient of 100mV below the reset threshold
would have to present for more than 50
μ
s to cause
a reset. Immunity can be increased by the addition
of a small by-pass capacitor of 0.1μF connected as
close to the V
CC
pin as possible.
AAT3526/7/8
MicroPower Supervisory Circuit with Manual Reset
3526.2002.1.0.62
7
Figure 2: Using AAT3528 Open Drain Output with Multiple Supplies
AAT3528
5V
System
+3.3V
V
CC
V
CC
RESET
100k
GND
GND
RESET
INPUT
MR
+5.0V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3528ICX-3.00-200-T1 | 制造商:Advanced Analogic Tech 功能描述:AAT3526 Series 3 V 150ms Reset Timeout MicroPower Supervisory Circuit-SOT143-4 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3526 Series 3 V 150ms Reset Timeout MicroPower Supervisory Circuit-SOT143-4 |
| AAT3532IAS-T1 | 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
| AAT3601IIH-T1 | 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
| AAT3603AIIH-T1 | 功能描述:電池管理 Total Power Solution for Portable App RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| AAT3603IIH-T1 | 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
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