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MIC2775-XXBM5 参数 Datasheet PDF下载

MIC2775-XXBM5图片预览
型号: MIC2775-XXBM5
PDF下载: 下载PDF文件 查看货源
内容描述: 微功率电压监控器 [Micro-Power Voltage Supervisor]
分类和应用: 光电二极管监控
文件页数/大小: 7 页 / 334 K
品牌: MICREL [ MICREL SEMICONDUCTOR ]
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MIC2775
Micrel, Inc.
MIC2775
Micro-Power Voltage Supervisor
General Description
The MIC2775 is a power supply supervisor that provides
under-voltage monitoring, manual reset capability, and
power-on reset generation in a compact 5-pin SOT package.
Features include an under-voltage detector, a delay genera-
tor, a manual reset input, and both active-high and active-low
reset outputs. The under-voltage detector compares V
DD
against a fixed threshold. Ten factory-programmed thresholds
are available.
The reset outputs are asserted for no less than 140ms at
power-on and any time the input voltage drops below the
reference voltage. It remains asserted for the timeout period
after the input voltage subsequently rises back above the
threshold boundary. A reset can be generated at any time
by asserting the manual reset input, /MR. This reset output
will remain active at least 140ms after the release of /MR.
The /MR input can also be used to daisy-chain the MIC2775
onto existing power monitoring circuitry or other supervisors.
Hysteresis is included to prevent chattering due to noise.
Typical supply current is a low 3.5µA.
Features
Monitors power supply for under-voltage conditions
Choice of factory-programmed thresholds
Generates 140ms (minimum) power-on RESET pulse
Manual reset capability
Both active-high and active-low RESET outputs
/RST output valid down to 1.2V
Ultra-low supply current, 3.5µA typical
Rejects brief input transients
No external components
Pin compatible upgrade for MAX825
IttyBitty™ 5-pin SOT-23 package
Applications
Monitoring processor core and input/output voltages
Computer systems
PDAs, hand-held PCs
Embedded controllers
Telecommunications systems
Power supplies
Ordering Information
Part Number
Standard
MIC2775-XXBM5
Marking
Pb-Free
UJXX
MIC2775-XXYM5
Marking
UJXX
Junction Temp. Range
–40ºC to +85ºC
Package
SOT-23-5
Typical Application
1.8V
MIC2775-17
VDD RST
/MR
/RST
MICROPROCESSOR
VDD
/RESET
GND
OTHER
LOGIC
GND
Manual
Reset
IttyBitty™ is a trademark of Micrel, Inc.
Micrel, Inc. • 2180Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2009
1
MIC2775