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ManualsBrandsMaxim ManualsIntegrated Circuits (ICs)Power management IC, DIL-8
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General Description
The MAX698/MAX699 monitor the +5V supply in micro-
processor (µP) and digital systems. They supply a
RESET pulse of at least 140ms duration on power-up,
power-down, and during low-voltage brownout condi-
tions. Circuit reliability is increased at reduced cost by
eliminating all external components and adjustments.
The MAX699 includes all features of the MAX698, but
also provides a watchdog input to monitor microproces-
sor activity. The RESET output goes low if the watchdog
input (WDI) is not toggled within 1 second. The watch-
dog feature can be disabled by leaving WDI open.
Both parts are supplied in 8-lead PDIP and 16-lead
0.3in wide small outline (SO) packages and are speci-
fied from 0°C to +70°C for C grade devices and -40°C
to +85°C for E devices. The SO versions, with more
pins than the 8-lead PDIP, have additional outputs not
available in DIP packages. These are RESET (without
inversion) and watchdog output (WDO).
Applications
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical µP Power Monitoring
Features
♦ Precision Voltage Monitor
♦ Power-OK/Reset Time Delay
♦ Watchdog Timer
♦ Minimum Component Count
MAX698/MAX699
Low-Cost, Power-On Reset
and Watchdog Controllers
________________________________________________________________ Maxim Integrated Products 1
19-2349; Rev 3; 12/05
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.
V
CC
V
CC
RESET
GND
GND
GND
N.C.
N.C. (WDI)*
MAX698
MAX699*
1
2
3
4
8
7
6
5
DIP
SO
V
CC
V
CC
RESET
RESET
GND
GND
N.C.
N.C. (WDO)*
MAX698
MAX699*
1
2
3
4
16
15
14
13
N.C.
N.C.
N.C.
N.C.
N.C.
GND
N.C.
N.C. (WDI)*
5
6
7
8
12
11
10
9
TOP VIEW
* PIN LABELS IN ( ) ARE FOR MAX699 ONLY
Pin Configuration
Ordering Information
MAX698
1
2
3
4
V
CC
V
CC
GND
GND
GND
RESET
N.C.
N.C.
8
7
6
5
+5V
+5V
TO µP
RESET
INPUT
Typical Operating Circuit
PART* TEMP RANGE
PIN-PACKAGE
MAX698CPA 0°C to +70°C 8 PDIP
MAX698CWE 0°C to +70°C 16 Wide SO
MAX698EPA -40°C to +85°C 8 PDIP
MAX698EWE -40°C to +85°C 16 Wide SO
MAX699CPA 0°C to +70°C 8 PDIP
MAX699CWE 0°C to +70°C 16 Wide SO
MAX699EPA -40°C to +85°C 8 PDIP
MAX699EWE -40°C to +85°C 16 Wide SO
*Devices are available in both leaded and lead-free packag-
ing. Specify lead free by adding the + symbol at the end of the
part number when ordering.

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