MIC70_N MICREL [Micrel Semiconductor], MIC70_N Datasheet

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MIC70_N

Manufacturer Part Number
MIC70_N
Description
?P Supervisory Circuits
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC70_NMIC705N
Manufacturer:
MICREL
Quantity:
5 510
Part Number:
MIC70_NMIC706N
Manufacturer:
MIC
Quantity:
20 000
MIC705/6/7/8 µP Supervisory Circuits
Description
The MIC705/MIC706/MIC707/MIC708 are inexpensive
microprocessor supervisory circuits that monitor power
supplies in microprocessor based systems. The circuit
functions include a watchdog timer, microprocessor
reset, power failure warning and a debounced manual
reset input.
The MIC705 and MIC706 offer a watchdog timer
function while the MIC707 and MIC708 have an active
high reset output in addition to the active low reset
output.
Supply voltage monitor levels of 4.65V and 4.4V are
available. The MIC705/MIC707 have a nominal reset
threshold level of 4.65V while the MIC706 and MIC708
have a 4.4V nominal reset threshold level. When the
supply voltage drops below the respective reset
threshold level, RESET is asserted.
Typical Applications
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Ordering Information
MIC70_N
MIC70_M
Part
Automotive Systems
Intelligent Instruments
Critical Microprocessor Power Monitoring
Printers
Computers
Controllers
8-Lead PDIP
8-Lead SOIC
Package
-40°C to +85°C
-40°C to +85°C
Temp. Range
Pin Configuration
Features
Typical Operating Circuit
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Debounced Manual Reset Input is
TTL/CMOS Compatible
Reset Pulse Width, 200ms
Watchdog Timer, 1.6s (MIC705/MIC706)
4.4V or 4.65V Precision Voltage Monitor
Early Power Fail Warning
Detect
µP Supervisory Circuits
N Package - 8 Lead Plastic DIP Package
M Package - 8 Lead Plastic SOIC Package
MIC705/6/7/8
Top View
or Low Battery
1

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MIC70_N Summary of contents

Page 1

... Critical Microprocessor Power Monitoring · Printers · Computers · Controllers Ordering Information Part Package MIC70_N 8-Lead PDIP -40°C to +85°C MIC70_M 8-Lead SOIC -40°C to +85°C MIC705/6/7/8 µP Supervisory Circuits Pin Configuration N Package - 8 Lead Plastic DIP Package M Package - 8 Lead Plastic SOIC Package Features · ...

Page 2

... WDO Output Voltage I Source = 800 A I Sink = 1.2mA 2 Operating Temperature Range MIC70_N, MIC70_M . . . . . . . . . . . . . . . . . -40°C to 85°C Storage Temperature Range . . . . . . . . . . . . .-65°C to 150°C Lead Temperature (Soldering - 10 sec 300°C Power Dissipation (PDIP 475mW Power Dissipation (SOIC 400mW = -40°C to 85°C unless otherwise noted. ...

Page 3

Electrical Characteristics 4.75V to 5.5V for MIC705/MIC707 4.5V to 5.5V for MIC706/MIC708, T Parameter Conditions MR Pull-Up Current Pulse Width Input Threshold ...

Page 4

MIC705/6/7/8 P Supervisory Circuits Pin Functions Pin No. MIC705 MIC707 Pin Name MIC706 MIC708 VCC 2 2 GND 3 3 PFI 4 4 PFO 5 5 WDI 6 N/A N/C N/A 6 RESET 7 7 WDO 8 ...

Page 5

Block Diagram * 4.4V for MIC706 Figure 1. MIC705/MIC706 Block Diagram * 4.4V for MIC708 Figure 2. MIC707/MIC708 Block Diagram MIC705/6/7/8 P Supervisory Circuits 5 ...

Page 6

MIC705/6/7/8 P Supervisory Circuits Circuit Description Power Fail Warning An additional comparator which is independent of other functions on the MIC705/706/707/708 is provided for early warning of power failure. An external voltage Unregulated DC R1 PFI + - 1.25V R2 ...

Page 7

Alternate Source Cross Reference Guide Industry P/N MAX705CPA MAX705CSA MAX705EPA MAX705ESA ADM705AN DS1705EPA DS1705ESA MAX706CPA MAX706CSA MAX706EPA ADM706AN DS1706EPA DS1706ESA MAX707CPA MAX707CSA MAX707EPA MAX707ESA ADM707AN DS1707EPA DS1707ESA MAX708CPA MAX708CSA MAX708EPA MAX708ESA ADM708AN DS1708EPA DS1708ESA MIC705/6/7/8 P Supervisory Circuits MIC Direct ...

Page 8

MIC705/6/7/8 P Supervisory Circuits Packaging Information M Package, 8-Pin Small Outline N Package, 8-Pin Plastic Dual-In-Line 0.035 0.015 0.150 0.125 0.023 0.015 8 0.400 0.370 0.260 0.240 0.310 0.290 0.150 0.120 0.110 0.370 0.090 0.300 ...

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