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參數資料
| 型號： | LM8364BALMFX45 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Micropower Undervoltage Sensing Circuits |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數： | 5/8頁 |
| 文件大小： | 199K |
| 代理商： | LM8364BALMFX45 |
Application Notes
The propagation delay time for the LM8364 is measured
using a 470k
pull-up resistor connected to from the RESET
output pin to 5V in addition to a 10pF capacitive load con-
nected from the same pin to GND.
Figure 1
shows the timing
diagram for the measurement for the propagation delay.
V
is equal to the sum of the detector threshold, V
DET
,
and the built in hysteresis, V
HYS
.
The LM8364 ultra-low current voltage detector was designed
to monitor voltages and to provide an indication when the
monitored voltage, V
IN
, dropped below a precisely trimmed
threshold voltage. This characteristic is displayed in the typi-
cal operating timing diagram below. V
IN
is the voltage that is
being monitored and a pull up resistor is connected from the
RESET output pin to V
. V
is at some value above V
and then begins to decrease. Since this is an Active Low
device the RESET output is pulled High through the pull-up
resistor and tracks V
until V
crosses the trimmed thresh-
old V
. At this point the LM8364 recognizes that V
is
now in a fault condition and the output immediately changes
to the Logic Low State. The RESET output will remain in this
low state until V
IN
increases above the threshold V
DET
+
V
HYS
. This point is also known as V
DET+
as indicated earlier.
This built-in hysteresis has been added to the design to help
prevent erratic reset operation when the input voltage
crosses the threshold.
The LM8364 has a wide variety of applications that can take
advantage of its precision and low current consumption to
monitor Input voltages even though it was designed as a
reset controller in portable microprocessor based systems. It
is a very cost effective and space saving device that will
protect your more expensive investments of microproces-
sors and other devices that need a guaranteed supply volt-
age for proper operation.
20065909
FIGURE 1. Propagation Delay Timing Diagrams
20065910
FIGURE 2. Timing Waveforms
L
www.national.com
5
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相關代理商/技術參數 |
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| LM8364BALMFX45/NOPB | 功能描述:IC DETECT UNDERVOLT 4.5V SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 監控器 系列:- 標準包裝:1 系列:- 類型:簡單復位/加電復位 監視電壓數目:1 輸出:開路漏極或開路集電極 復位:低有效 復位超時:標準傳輸延遲為 60 µs 電壓 - 閥值:3V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:Digi-Reel® 其它名稱:LM8364BALMF30DKR |
| LM8365 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Micropower Undervoltage Sensing Circuits with Programmable Output Delay |
| LM8365BALMF22 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Micropower Undervoltage Sensing Circuits with Programmable Output Delay |
| LM8365BALMF22 | 制造商:Texas Instruments 功能描述:IC VOLT MONITOR CIRCUIT SMD 8365 |
| LM8365BALMF22/NOPB | 功能描述:IC DETECT UNDERVOLT 2.2V SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 監控器 系列:- 標準包裝:100 系列:- 類型:簡單復位/加電復位 監視電壓數目:1 輸出:- 復位:低有效 復位超時:最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:8-TSSOP 包裝:管件 |
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