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MIC812 데이터시트 PDF




Micrel Semiconductor에서 제조한 전자 부품 MIC812은 전자 산업 및 응용 분야에서
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부품번호 MIC812 기능
기능 Microprocessor Reset Circuits
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MIC812 데이터시트, 핀배열, 회로
MIC811/812
Microprocessor Reset Circuits
General Description
The MIC811 and MIC812 are inexpensive microprocessor
supervisory circuits that monitor power supplies in
microprocessor based systems.
The function of this device is to assert a reset if either the
power supply drops below a designated reset threshold
level or /MR is forced low. Several different reset threshold
levels are available to accommodate 3V, 3.3V or 5V
powered systems.
The MIC811 has an active low /RESET output, while the
MIC812 offers an active high RESET output. The reset
output is guaranteed to remain asserted for a minimum of
140ms after VCC has risen above the designed reset
threshold level. Having a push-pull output stage, the
MIC811/812 does not require a pull-up resistor at the
output. The MIC811/812 comes in a 4-pin SOT-143
package.
If a microprocessor voltage supervisor with an open-drain
output stage is needed, see MIC6315.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
Precision voltage monitor for 3V, 3.3V or 5V power
supplies
/RESET remains valid with VCC as low as 1V
5μA typical supply current
140ms minimum reset pulse width available
Manual reset input
Available in 4-pin SOT-143 package
Applications
Portable equipment
Intelligent instruments
Critical microprocessor power monitoring
Printers/computers
Controllers
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 9, 2014
Revision 2.0




MIC812 pdf, 반도체, 판매, 대치품
Micrel, Inc.
MIC811/812
Electrical Characteristics (Continued)(5)
For typical values, VCC = 5V for MIC8_L/M/J, VCC = 3.3V for MIC8_S/T, VCC = 3V for MIC8_R; TA = 25°C, bold values indicate –40°C to
TA +85°C; unless noted.
Symbol Parameter
Condition
Min Typ Max Units
/MR Minimum Pulse Width
10 µs
/MR to Reset Delay
0.5 µs
VIH /MR Input Threshold
VCC > VTH max., MIC81_L/M/J
MIC81_R/S/T
2.3
0.7xVCC
V
V
VIL /MR Input Threshold VCC > VTH max., MIC81-L/M/J
MIC81_R/S/T
0.8
0.25xVCC
V
V
/MR Pull-Up Resistance
10 20 30 k
/MR Glitch Immunity
100 ns
Timing Diagram
Functional Diagram
Reset Timing Diagram
September 9, 2014
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MIC812 전자부품, 판매, 대치품
Micrel, Inc.
MIC811/812
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high performance linear and power, LAN, and timing &
communications markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-
performance communication, clock management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches,
and physical layer transceiver ICs. Company customers include leading manufacturers of enterprise, consumer, industrial, mobile,
telecommunications, automotive, and computer products. Corporation headquarters and state-of-the-art wafer fabrication facilities are
located in San Jose, CA, with regional sales and support offices and advanced technology design centers situated throughout the
Americas, Europe, and Asia. Additionally, the Company maintains an extensive network of distributors and reps worldwide.
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this
datasheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the
right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and
conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty
relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose,
merchantability, or infringement of any patent, copyright, or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where
malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or
systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be
reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support
appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting
from such use or sale.”
© 2014 Micrel, Incorporated.
September 9, 2014
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