MIC8115 Micrel Semiconductor, MIC8115 Datasheet

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MIC8115

Manufacturer Part Number
MIC8115
Description
Microprocessor Reset Circuit
Manufacturer
Micrel Semiconductor
Datasheet

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MIC8115 Microprocessor Reset Circuit
Description
The MIC8115 is an inexpensive microprocessor reset
circuit 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.
The MIC8115 has an active low RESET output. The
reset output is guaranteed to remain asserted for a
minimum of 1100ms after VCC has risen above the
designated reset threshold level. The MIC8115 comes
in a 4-pin SOT-143 package.
Typical Applications
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Ordering Information
Place the device suffix of desired reset threshold voltage from table above in
blank to complete the part number.
MIC8115TU
Part
Portable Equipment
Intelligent Instruments
Critical Microprocessor Power Monitoring
Printers/Computers
Controllers
4-Lead SOT-143
Package
-40°C to +85°C
Temp. Range
Pin Configuration
Features
Typical Operating Circuit
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RESET Remains Valid with V CC as Low
as 1.4V
Precision Voltage Monitor for 3.3V
Power Supplies
Available in 4-Pin SOT-143 Package
<15 A Supply Current
1100ms Minimum Reset Pulse Width
Manual Reset Input
Specifically tailored to the reset
requirements of the
AMD Elan SC500 Series
Microprocessor Reset Circuit
MR
V CC
RESET
MIC8115
Top View
V CC
RESET
V CC
1

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MIC8115 Summary of contents

Page 1

... The function of this device is to assert a reset if either the power supply drops below a designated reset threshold level forced low. The MIC8115 has an active low RESET output. The reset output is guaranteed to remain asserted for a minimum of 1100ms after VCC has risen above the designated reset threshold level ...

Page 2

... MR Minimum Pulse Width MR to Reset Delay MR Input Threshold Input Threshold Pull-Up Resistance MR Glitch Immunity 2 Operating Temperature Range MIC8115TU . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C Storage Temperature Range . . . . . . . . . . . . .-65°C to 150°C Lead Temperature (Soldering - 10 sec 300°C 20mA Power Dissipation ( +70° 320mW Min 1.4 1.6 3 ...

Page 3

... MR is held low and for one reset timeout period (1100ms) min.) after MR goes high. This input can be shorted to ground via a switch or driven from CMOS or TTl logic. Pulled high internally through a 20k resistor. Float if unused Power supply input. MIC8115 Microprocessor Reset Circuit 3 ...

Page 4

... MIC8115 Microprocessor Reset Circuit Block Diagram Figure 1. MIC8115 Block Diagram 4 ...

Page 5

... RESET will remain valid with low as 1.4V Transients The MIC8115 is relatively immune to negative-going V CC glitches below the reset threshold. Typically, a negative-going transient 125mV below the reset threshold with a duration less will not cause an unwanted reset ...

Page 6

... MIC8115 Microprocessor Reset Circuit 6 ...

Page 7

... Packaging Information U Package, 4-Pin SOT-143 Small-Outline Transistor Package MIC8115 Microprocessor Reset Circuit Dimensions are in inches. Device Marking Information Lot Code NTXX = MIC8115TU 7 ...

Page 8

... MIC8115 Microprocessor Reset Circuit Packaging Information 2.7–0.1 3.1–0.1 8 Tape and Reel Information 4.0–0.1 2.0–0.05 fl1.1–0.1 4.0–0.1 1.2–0.1 Dimensions are in millimeters. fl1.5–0.1 1.75–0.1 3.5–0.05 8.0–0.3 ...

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