MAX704R Maxim Integrated Products, MAX704R Datasheet
MAX704R
Manufacturer Part Number
MAX704R
Description
P Reset ic With Watchdog And Battery Switchover
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX704R.pdf
(12 pages)
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These microprocessor (µP) supervisory circuits reduce
the complexity and number of components required for
power-supply monitoring and battery-control functions
in µP systems. They significantly improve system relia-
bility and accuracy compared to separate ICs or
discrete components.
These devices are designed for use in systems powered
by 3.0V or 3.3V supplies. See the selector guide in the
back of this data sheet for similar devices designed for
5V systems. The suffixes denote different reset threshold
voltages: 3.075V (T), 2.925V (S), and 2.625V (R) (see
Reset Threshold section in the Detailed Description ). All
these parts are available in 8-pin DIP and SO packages.
Functions offered in this series are as follows:
________________________Applications
19-0243; Rev 1; 9/94
Call toll free 1-800-998-8800 for free samples or literature.
MAX690
MAX704
MAX802
MAX804
MAX805
MAX806
_______________General Description
__________________Pin Configuration
Part
( ) ARE FOR MAX804T/S/R, MAX805T/S/R
< >
3.0V/3.3V Microprocessor Supervisory Circuits
TOP VIEW
ARE FOR MAX704T/S/R, MAX806T/S/R
Battery-Powered Computers and Controllers
Embedded Controllers
Intelligent Instruments
Automotive Systems
Critical µP Power Monitoring
Portable Equipment
V
GND
V
OUT
PFI
CC
________________________________________________________________ Maxim Integrated Products
1
2
3
4
MAX690T/S/R
MAX704T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
MAX806T/S/R
DIP/SO
7
6
5
8
±4%
±4%
±2%
±2%
±4%
±2%
VBATT
RESET (RESET)
WDI
PFO
<
MR
>
±75mV
±75mV
±75mV
±2%
±2%
±2%
____________________________Features
Ordering Information continued on last page.
* Contact factory for dice specifications.
** These parts offer a choice of reset threshold voltage. Select
_________Typical Operating Circuits
UNREGULATED
______________Ordering Information
MAX690_CPA
MAX690_CSA
MAX690_C/D
MAX690_EPA
MAX690_ESA
MAX690_MJA
the letter corresponding to the desired nominal reset threshold
voltage (T = 3.075V, S = 2.925V, R = 2.625V) and insert it into
the blank to complete the part number.
( ) ARE FOR MAX804T/S/R, MAX805T/S/R
See last page for MAX704T/S/R, MAX806T/S/R.
–
Manual Reset Input
Precision Supply-Voltage Monitor
200ms Reset Time Delay
Watchdog Timer (1.6sec timeout)
Battery-Backup Power Switching—
Battery Can Exceed V
40µA V
1µA Battery Supply Current
Voltage Monitor for Power-Fail or
Low-Battery Warning
Guaranteed
8-Pin DIP and SO Packages
R1
R2
R
PART**
—
E
—
DC
S
—
E
—
BATTERY
LITHIUM
T
–
0.1 F
3.6V
CC
and RESET Outputs
Supply Current
–
R
—
REGULATED +3.3V OR +3.0V
0.1 F
E
—
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
S
PFI
VBATT
—
TEMP. RANGE
E
0°C to +70°C
0°C to +70°C
0°C to +70°C
—
V
T
–
MAX690T/S/R
MAX802T/S/R
MAX804T/S/R
MAX805T/S/R
CC
Assertion to V
GND
CC
in Normal Operation
(RESET)
RESET
V
PFO
WDI
OUT
0.1 F
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP
CC
PIN-PACKAGE
= 1V
V
RESET
NMI
I/O LINE
V
CC
CMOS RAM
CC
BUS
P
GND
GND
1
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