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參數(shù)資料
| 型號： | MIC845NYC5 TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMPARATOR W/REFERENCE SC70-5 |
| 標準包裝： | 1 |
| 系列： | Teeny™ |
| 類型： | 帶電壓基準 |
| 元件數(shù)： | 1 |
| 輸出類型： | 開路漏極 |
| 電壓 - 電源，單路/雙路(±)： | 2.75 V ~ 5.5 V |
| 電流 - 靜態(tài)（最大值）： | 3µA |
| 磁滯： | 40mV |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 6-TSSOP（5 引線），SC-88A，SOT-353 |
| 安裝類型： | 表面貼裝 |
| 包裝： | 標準包裝 |
| 產(chǎn)品目錄頁面： | 1081 (CN2011-ZH PDF) |
| 其它名稱： | 576-1959-6 |
MIC845
Micro-Power Comparator /
Battery Monitor
Teeny is a trademark of Micrel, Inc.
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
July 2005
M9999-070505
(408) 955-1690
General Description
The MIC845 is a precision micro-power voltage
comparator with an on-chip 2.55V reference voltage
source.
Intended for voltage monitoring applications, the
MIC845 can be used with an external resistor divider
to detect a wide range of voltages, or without
external resistors to directly monitor voltages with its
high input impedance CMOS input.
The MIC845 incorporates a voltage reference and
comparator with fixed internal hysteresis. When the
2.55V internal threshold is crossed, the output
switches polarity.
MIC845 is available with a push-pull or open-drain
output stage. The push-pull output stage is
configured for both active high or active low output;
the open-drain output stage is only configured active
high.
Supply current is extremely low (typically 1A),
making it ideal for portable applications.
MIC845 is supplied in Micrel’s Teeny 5-lead SC-
70 package.
Data sheets and support documentation can be
found on Micrel’s web site at www.micrel.com.
Teeny
Features
Extremely low 1A supply current (typical)
2.55V on chip reference
±2% voltage threshold accuracy
Optimized for PDAs, cellular telephones, pagers,
and other battery-powered devices
Open-drain output can be pulled up to 6V
regardless of supply voltage
5-lead SC-70 package
Applications
PDAs
Pagers
Cordless phones
Portable electronics
Motherboards
Bladed servers
____________________________________________________________________________________________________
Typical Applications
R1
INP
GND
OUT
VDD
VREF = 2.55V
MIC845
Internal Fixed Hysteresis
R2
VDD
VIN
VOUT
2.75V < VDD < 5.5V
Threshold Detector with
3.3V
INP
GND
OUT
VDD
to Host
Memory
power
Lithium
Coin Cell
MIC845
Nano-Power Battery Monitor
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