MIC6315 Micrel Semiconductor, MIC6315 Datasheet

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MIC6315

Manufacturer Part Number
MIC6315
Description
Open-Drain UP Reset Circuit
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
The MIC6315 is an inexpensive reset generator circuit that
monitors 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 MIC6315 has an active low, open-drain /RESET output.
The reset output is guaranteed to remain asserted for a
minimum of either 20ms, 140ms, or 1100ms after V
risen above the designed reset threshold level. The MIC6315
comes in a 4-pin SOT-143 package.
Typical Application
July, 2004
MIC6315
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
CC
has
1
Features
• Precision voltage monitor for 3V, 3.3V or 5V power
• /RESET remains valid with V
• <15 A supply current
• 20ms, 40ms, or 1100ms minimum reset pulse widths
• Manual reset input
• 4-pin SOT-143 package
Applications
• Portable equipment
• Intelligent instruments
• Critical microprocessor power monitoring
• Printers/computers
• Embedded controllers
supplies
available
Open-Drain P Reset Circuit
MIC6315
CC
as low as 1.4V
M9999-071504
Micrel

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MIC6315 Summary of contents

Page 1

... The MIC6315 has an active low, open-drain /RESET output. The reset output is guaranteed to remain asserted for a minimum of either 20ms, 140ms, or 1100ms after V risen above the designed reset threshold level. The MIC6315 comes in a 4-pin SOT-143 package. Typical Application Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com ...

Page 2

... 4.63 1100 – +85 C MIC6315-xxDyU 4-Lead SOT-143 Pin Function IC Ground Pin. /RESET goes low if V falls below the reset threshold and remains asserted CC for one reset timeout period after V Manual Reset Input. A logic low on /MR forces a reset. The reset will remain asserted as long as /MR is held low and for one reset timeout period after /MR goes high ...

Page 3

... MIC6315 Absolute Maximum Ratings Terminal Voltage (V , /RESET) ...................................... –0.3V to 6.0V CC (/MR) ........................................ –0. Rate of Rise (V ) ................................................. 100V Input Current (V , /MR) ............................................ 20mA CC Output Current (/RESET) ........................................... 20mA Lead Temperature (soldering, 10 sec.) ..................... 300 C Storage Temperature (T ) ........................ – 150 C S ESD Rating(3) Electrical Characteristics For typical values ...

Page 4

... MIC6315 Timing Diagram V CC /MR /RESET Functional Diagram M9999-071504 RST RST Reset Timing Diagram 4 Micrel July, 2004 ...

Page 5

... Valid at Low Voltage As V drops to 0V, the MIC6315 will no longer be able to pull CC the /RESET output low. At this point, the pull-up resistor will pull the output high. The value of the pull-up resistor and the voltage it is connected to will affect the point at which this happens ...

Page 6

... MIC6315 Package Information 0.950 (0.0374) TYP 3.05 (0.120) 2.67 (0.105) 0.800 (0.031) TYP 0.400 (0.016) TYP 3 PLACES MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. ...

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