MAX805L Maxim Integrated Products, MAX805L Datasheet
MAX805L
Manufacturer Part Number
MAX805L
Description
(MAX6xxx) Microprocessor Supervisory Circuits
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX805L.pdf
(12 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MAX805LCPA
Manufacturer:
PHILIPS
Quantity:
5 510
Part Number:
MAX805LCSA+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX805LESA+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
www.DataSheet4U.com
19-4333; Rev 4; 12/05
The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L
reduce the complexity and number of components
required for power-supply monitoring and battery-control
functions in microprocessor (µP) systems. They signifi-
cantly improve system reliability and accuracy compared
to separate ICs or discrete components.
These parts provide four functions:
1) A reset output during power-up, power-down, and
2) Battery-backup switching for CMOS RAM, CMOS
3) A reset pulse if the optional watchdog timer has not
4) A 1.25V threshold detector for power-fail warning or
The parts differ in their reset-voltage threshold levels
and reset outputs. The MAX690A/MAX802L/MAX805L
generate a reset pulse when the supply voltage drops
below 4.65V, and the MAX692A/MAX802M generate a
reset below 4.40V. The MAX802L/MAX802M guaran-
tee power-fail accuracies to ±2%. The MAX805L is the
same as the MAX690A except that RESET is provided
instead of RESET.
All parts are available in 8-pin DIP and SO packages.
The MAX690A/MAX802L are pin compatible with the
MAX690 and MAX694. The MAX692A/MAX802M are
pin compatible with the MAX692.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
__________________General Description
__________Typical Operating Circuit
_______________________Applications
UNREGULATED DC REGULATED +5V
brownout conditions.
µP, or other low-power logic.
been toggled within 1.6sec.
low-battery detection, or to monitor a power supply
other than +5V.
R
R
1
2
Battery-Powered Computers and Controllers
Intelligent Instruments
Automotive Systems
Critical µP Power Monitoring
BATTERY
LITHIUM
O.1µF
3.6V
MAX690A
MAX802L
________________________________________________________________ Maxim Integrated Products
PFI
V
V
BATT
CC
GND
RESET
V
PFO
WDI
OUT
Microprocessor Supervisory Circuits
V
V
NMI
I/O LINE GND
RESET
CC
CC
CMOS
RAM
µP
GND
♦ Precision Supply-Voltage Monitor:
♦ Reset Time Delay – 200ms
♦ Watchdog Timer – 1.6sec Timeout
♦ Battery-Backup Power Switching
♦ 200µA Quiescent Supply Current
♦ 50nA Quiescent Supply Current in Battery-
♦ Voltage Monitor for Power-Fail or Low-Battery
♦ Power-Fail Accuracy Guaranteed to ±2%
♦ Guaranteed R R E E S S E E T T Assertion to V
♦ 8-Pin SO and DIP Packages
Ordering Information continued on last page.
* Dice are specified at T
**Contact factory for availability and processing to MIL-STD-883.
Devices in PDIP and SO packages are available in both leaded
and lead-free packaging. Specify lead free by adding the +
symbol at the end of the part number when ordering. Lead free
not available for CERDIP package.
_________________Pin Configurations
MAX690ACPA
MAX690ACSA
MAX690AC/D
MAX690AEPA
MAX690AESA
MAX690AMJA
______________Ordering Information
___________________________Features
TOP VIEW
4.65V for MAX690A/MAX802L/MAX805L
4.40V for MAX692A/MAX802M
Backup Mode
Warning
(MAX802L/M)
( ) ARE FOR MAX805L ONLY.
PART
V
GND
V
OUT
PFI
CC
1
2
3
4
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
TEMP. RANGE
A
0°C to +70°C
0°C to +70°C
0°C to +70°C
MAX802M
= +25°C
MAX690A
MAX692A
MAX802L
MAX805L
DIP/SO
8
7
6
5
V
RESET (RESET)
WDI
PFO
BATT
CC
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 CERDIP**
Dice*
PIN-PACKAGE
= 1V
1