MIC810LYC3-TR [MICROCHIP]
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3;
| 型号： | MIC810LYC3-TR |
| 厂家： | 
MICROCHIP |
| 描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 光电二极管 |
| 文件： | 总10页 (文件大小：590K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC809/810
Microprocessor Reset Circuits
General Description
Features
The MIC809 and MIC810 are inexpensive microprocessor
supervisory circuits that monitor power supplies in
microprocessor-based systems.
• Precision voltage monitor for 3V, 3.3V, or 5V power
supplies
• /RESET remains valid with VCC as low as 1.4V for
SOT-23 packaged part
The function of these devices is to assert a reset if the
power supply drops below a designated reset threshold
level. Several different reset threshold levels are available
to accommodate 3V, 3.3V or 5V powered systems.
• /RESET remains valid with VCC as low as 1V for
SC70-packaged part
• Typically less than 15μA supply current for SOT-23
packaged part
The MIC809 has an active-low /RESET output, while the
MIC810 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 designated reset
threshold level. Having a push-pull output stage, the
MIC809/810 does not require a pull-up resistor at the
output. The MIC809/810 comes in a 3-pin SOT-23 and
SC-70 package.
• 5µA (typical) supply current for SC70-packaged part
• 140ms (minimum) reset pulse widths available
• Available in 3-pin SOT-23 and SC-70 package
Applications
• Portable equipment
• Intelligent instruments
• Critical microprocessor power monitoring
• Printers/computers
The MIC809 is also available with a shorter reset timeout
(30ms, minimum).
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
• 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
July 6, 2015 Revision 3.0
Micrel, Inc.
MIC809/810
Ordering Information(1)
Part Number
Marking(2)
Threshold Voltage (V)
Operating Temperature Range
Lead Finish
3-Pin SOT-23
MIC809LUY
MIC809MUY
MIC809JUY
MIC809TUY
MIC809SUY
MIC809RUY
MIC810LUY
MIC810MUY
MIC810JUY
MIC810TUY
MIC810SUY
MIC810RUY
3-Pin SC-70
MIC809LYC3
MIC809MYC3
MIC809JYC3
MIC809TYC3
MIC809SYC3
MIC809RYC3
MIC810LYC3
MIC810MYC3
MIC810JYC3
MIC810TYC3
MIC810SYC3
MIC810RYC3
IL
IM
IJ
4.63
4.38
4.00
3.08
2.93
2.63
4.63
4.38
4.00
3.08
2.93
2.63
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
IT
IS
IR
JL
JM
JJ
JT
JS
JR
Note:
1. All devices available in Tape and Reel only (Order entry PN, add TR, i.e., MIC809LUY TR). Standard/full reel quantity is 3,000 pieces. Reel diameter
is 7in, hub diameter is 2in, and width is 8mm.
2. Underbar symbol (__) may not be to scale.
Pin Configuration
3-Pin MIC809 SOT-23
3-Pin MIC809 SC-70
(Top View)
3-Pin MIC810 SOT-23
3-Pin MIC810 SC-70
(Top View)
July 6, 2015
Revision 3.0
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Micrel, Inc.
MIC809/810
Pin Description
Pin Number
MIC809
Pin Number
MIC810
Pin Name Pin Name
1
1
GND
IC Ground Pin.
/RESET goes low if VCC falls below the reset threshold and remains asserted
2
N/A
/RESET
for one reset timeout period (140ms min.) after VCC exceeds the reset
threshold.
RESET goes high if VCC falls below the reset threshold and remains asserted
for one reset timeout period (140ms, minimum) after VCC exceeds the reset
threshold.
N/A
3
2
3
RESET
VCC
Power Supply Input.
Part Numbering Conventions
MIC809 SOT-23
MIC809 SC-70
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MIC809/810
Absolute Maximum Ratings(3)
Operating Ratings(4)
Terminal Voltage (VCC)................................. –0.3V to +6.0V
Input Current (VCC)......................................................20mA
Output Current (/RESET, RESET)..............................20mA
Lead Temperature (soldering, 10s)............................ 300°C
Storage Temperature (TS)...........................–65°C to 150°C
Rate-of-Rise (VCC)...................................................100V/μs
ESD Rating(5).................................................... 3kV (SC-70)
Operating Temperature Range
MIC809 .................................................–40°C to +85°C
MIC810 .................................................–40°C to +85°C
Power Dissipation (TA = +70°C)...............................320mW
Electrical Characteristics(6)
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 otherwise noted.
Symbol
Parameter
Condition
Min.
1.4
1.6
1
Typ.
Max.
5.5
5.5
5.5
15
Units
TA = 0°C to 70°C (SOT-23)
TA = –40°C to 85°C (SOT-23)
TA = –40°C to 85°C (SC70)
MIC809L/M/J, MIC810L/M/J (SOT-23)
MIC809L/M/J, MIC810L/M/J (SC-70)
V
V
V
VCC
Operating Voltage Range
9
5
15
VCC <3.6V, MIC809R/S/T,
MIC810R/S/T (SOT-23)
ICC
Supply Current
µA
6
5
10
10
VCC <3.6V, MIC809R/S/T,
MIC810R/S/T (SC-70)
MIC809L, MIC810L
MIC809M, MIC810M
MIC809J, MIC810J
MIC809T, MIC810T
MIC809S, MIC810S
MIC809R, MIC810R
4.50
4.25
4.63
4.38
4.00
3.08
2.93
2.63
240
4.75
4.50
4.10
3.15
3.00
2.70
560
3.89
VTH
Reset Voltage Threshold
V
3.00
2.85
2.55
tRST
VOH
Reset Timeout Period
140
ms
V
ISOURCE = 800µA, MIC809L/M/J
ISOURCE = 500µA, MIC809R/S/T
V
CC – 1.5V
/RESET Output Voltage (MIC809)
0.8 × VCC
Notes:
3. Exceeding the absolute maximum ratings may damage the device.
4. The device is not guaranteed to function outside its operating ratings.
5. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
6. Specification for packaged product only.
July 6, 2015
Revision 3.0
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Micrel, Inc.
MIC809/810
Electrical Characteristics(6) (Continued)
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 otherwise noted.
Symbol
Parameter
Condition
CC = VTH (minimum), ISINK = 3.2mA,
Min.
Typ.
Max.
Units
V
0.4
0.3
0.3
0.3
0.3
MIC809L/M/J
VCC = VTH (minimum)., ISINK = 1.2mA,
MIC809R/S/T
VCC >1.4V, ISINK = 50µA,
TA = 0°C to +70°C
VOL
/RESET Output Voltage (MIC809)
V
VCC = 1V, ISINK = 50µA,
TA = –40°C to +85°C (SC-70)
VCC >1.6V, ISINK = 50µA,
TA = –40°C to +85°C
1.8V < VCC < VTH (minimum),
0.8 × VCC
VOH
VOL
RESET Output Voltage (MIC810)
RESET Output Voltage (MIC810)
V
V
I
SOURCE = 150µA
0.4
0.3
I
SINK = 3.2mA, MIC810L/M/J
ISINK = 1.2mA, MIC810R/S/T
Timing Diagram
Reset Timing Diagram
July 6, 2015
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Micrel, Inc.
MIC809/810
Functional Diagram
July 6, 2015
Revision 3.0
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Micrel, Inc.
MIC809/810
Application Information
Microprocessor Reset
The /RESET (or RESET) pin is asserted whenever VCC
falls below the reset threshold voltage. The /RESET pin
remains asserted for a period of 140ms after VCC has
risen above the reset threshold voltage. The reset
function ensures the microprocessor is properly reset and
powers up in a known condition after a power failure.
/RESET will remain valid with VCC as low as 1.4V (1V for
SC-70 package).
VCC Transients
The MIC809/810 are relatively immune to negative-going
VCC glitches below the reset threshold. Typically, a
negative-going transient 125mV below the reset
threshold with duration of 2µs or less (SC70 package) will
not cause a reset.
Interfacing to Bidirectional Reset Pins
The MIC809/810 can interface with µPs with bidirectional
reset pins by connecting a 4.7kΩ resistor in series with
the MIC809/810 output and the µP reset pin.
/RESET Valid at Low Voltage
A resistor can be added from the /RESET pin to ground
to ensure the /RESET output remains low with VCC down
to 0V. A 100kΩ resistor connected from the /RESET to
ground is recommended. The resistor should be small
enough to pull-down any stray leakage currents and large
enough not to load the reset output (Figure 1).
Figure 1. Reset Valid to VCC = 0V
July 6, 2015
Revision 3.0
7
Micrel, Inc.
MIC809/810
Package Information and Recommended Landing Patterns(7)
3-Pin SOT-23 (U)
Note:
7. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
July 6, 2015
Revision 3.0
8
Micrel, Inc.
MIC809/810
Package Information and Recommended Landing Patterns(7) (Continued)
3-Pin SC-70 (C3)
July 6, 2015
Revision 3.0
9
Micrel, Inc.
MIC809/810
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.
© 2004 Micrel, Incorporated.
July 6, 2015
Revision 3.0
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