八上英语作文MIC845
Micro-Power Comparator /
Battery Monitor
Teeny™ is a trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jo, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • 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 ud 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肾彩超需要空腹吗
2.55V internal threshold is crosd, 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 1µA),
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
Teeny™
Features
•Extremely low 1µA 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
诟骂Applications
• PDAs
• Pagers
• Cordless phones
• Portable electronics
• Motherboards
• Bladed rvers
____________________________________________________________________________________________________ Typical Applications
V REF = 2.55V
Internal Fixed Hysteresis
V OUT
2.75V < V DD< 5.5V
to Host
power
Nano-Power Battery Monitor
Ordering Information
Part Number
Standard Marking Pb-Free Marking* Temperature Range
Package MIC845HBC5 B19 MIC845HYC5 B19 –40° to +85°C
SC-70 MIC845LBC5 B20 MIC845LYC5 B20 –40° to +85°C SC-70 MIC845NBC5 B21 MIC845NYC5 B21
–40° to +85°C
SC-70
* Note: Underscore on device marking indicates Pb-Free packaging.
Pin Configuration
OUT
VDD
SC-70-5 (C5)
蝴蝶的颜色(TOP VIEW)
Pin Description
Pin Number Pin Name Pin Function
1偶蹄动物
NIC
No Internal Connection. A signal applied to this pin will have no effect on device operation.
2 GND Ground
3 INP Input: Analog input to the comparator. When V INP > V REF + V HYST , V OUT is
asrted, and the condition is held until V INP < V REF . OUT (“N” Version) Output: Active-high, op
en-drain output. This output is low when V INP < V REF , indicating a low voltage input. The output is high when V INP > V REF + V HYST .
OUT (“H” Version) Output: Active-high, Push-pull output. This output is low when
V INP < V REF , indicating a low voltage condition. The output is high when V INP > V REF + V HYST .
4绿墙上的安妮
OUT (“L” Version)
Output: Active-low, Push-pull output. This output is high when
V INP < V REF , indicating a low voltage condition. The output is low when V INP > V REF + V HYST .
5
VDD
Power Supply (Input): Independent supply input for internal circuitry.
Absolute Maximum Ratings(1)
Supply Voltage (V DD)..............................-0.3V to +6V Input Voltage (V INP).................................-0.3V to +6V Output Current (I OUT).........................................20mA Junction Temperature (T J)..............–40°C to +125°C Storage Temperature (T s)...............–65°C to +150°C Lead Temperature (soldering, 5 c.)..............260°C ESD Rating(3)........................................................3kV Operating Ratings(2)
Supply voltage (V DD)........................+2.75V to +5.5V -0.3 to 6V Ambient Temperature (T A)................–40°C to +85°C Junction to Ambient Thermal Resistance:
SC-70
(θJA)............................................450°C/W
ps圆角矩形怎么调圆角Electrical Characteristics
2.75V < V DD < 5.5V; T A = 25°C, Bold values indicate –40°C< T A < +85°C, unless noted.
Parameter Parameter Conditions Min Typ. Max Units I DD Supply Current No load on output 1 3 µA
I INP Input Leakage Current V DD = 5.5V, V INP = 0V .005 10 nA
I INP_PD Input Leakage Current in power down V DD = 0V (note 4),
V INP = 5.5V
.005 10 nA
V REF V REF–40°C to 85°C 2.50 2.55 2.60 V
V HYST Comparator
Hysteresis 8 25 40 mV
V OUT Output Voltage, ‘N’ I SINK = 1.6mA, VDD ≥ 2.75V 0.3 V
I SINK = 1.6mA, VDD ≥ 2.75V 0.3 V
V OUT Output Voltage, ‘L’ and ‘H’
I SOURCE = 500µA, VDD ≥ 2.75V
0.95
× V DD
0.99
× V DD
V说唱艺人
V INP = 2.7V to 2.4V 12 39 µs t D Propagation
Delay
V INP = 2.4V to 2.7V 8 26 µs Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD nsitive. Handling precautions recommended. Human body model: 1.5k in ries with 100pF.
4. VDD is tied to Gnd, not left floating.
Typical Characteristics
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200400600800-40-200204060
80
TEMPERATURE (°C)
V DD = 4.5V V IN = 0V
V DD = 0V V IN = 4.5V
-2000
-1500
-1000
-500050010001500-40-200204060
80
TEMPERATURE (°C)
V DD = 0V V IN = 4.5V
V DD = 4.5V V IN = 0V
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80
TEMPERATURE (°C)
I DD vs. Temperature
V DD = 3V V IN = 4.2V
V DD = 0V V IN = 4.2V
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TEMPERATURE (°C)
I IN vs. Temperature
V DD = 0V V IN = 4.2V
V DD = 3V V IN = 4.2V
Block Diagrams
OUT
V
OUT
V
OUT
V
V OUT
V IN
Type H and N
V OUT
V IN
Type L
