MAX691A/MAX693A/
MAX800L/MAX800M
General Description
Microprocessor Supervisory Circuits
The MAX691A/MAX693A/MAX800L/MAX800M micro-
processor (μP) supervisory circuits are pin-compatible
upgrades to the MAX691, MAX693, and MAX695. They
improve performance with 30μA supply current, 200ms
typ reset active delay on power-up, and 6ns chip-enable
propagation delay. Features include write protection
of CMOS RAM or EEPROM, separate watchdog out-
puts, backup-battery switchover, and a
RESET
output
that is valid with V
CC
down to 1V. The MAX691A/
MAX800L have a 4.65V typical reset-threshold voltage,
and the MAX693A/MAX800Ms’ reset threshold is 4.4V
typical. The MAX800L/MAX800M guarantee power-fail
accuracies to ±2%.
Features
● 200ms Power-OK/Reset Timeout Period
● 1μA Standby Current, 30μA Operating Current
● On-Board Gating of Chip-Enable Signals, 10ns max
Delay
● MaxCap
®
or SuperCap Compatible
● Guaranteed
RESET
Assertion to V
CC
= +1V
● Voltage Monitor for Power-Fail or Low-Battery
Warning
● Power-Fail Accuracy Guaranteed to ±2%
(MAX800L/M)
● Available in 16-Pin Narrow SO, Plastic DIP, and
TSSOP Packages
Applications
●
●
●
●
Ordering Information
PIN-
PACKAGE
MAX691ACUE
-0°C to +70°C 16 TSSOP
-0°C to +70°C 16 Narrow SO
-0°C to +70°C 16 Wide SO
-0°C to +70°C 16 Plastic DIP
MAX691AC/D
-0°C to +70°C
Dice*
MAX691AEUE
-0°C to +70°C 16 TSSOP
MAX691AESE
-40°C to +85°C 16 Narrow SO
MAX691AEWE
-40°C to +85°C 16 Wide SO
MAX691AEPE
-40°C to +85°C 16 Plastic DIP
Ordering Information continued at end of data sheet.
*Dice
are specified at T
A
= +25°C, DC parameters only.
Devices in PDIP, SO, and TSSOP packages are available in
both leaded and lead-free packaging. Specify lead free by add-
ing the + symbol at the end of the part number when ordering.
Lead free not available for CERDIP package.
PART
TEMP RANGE
CMOS RAM
ADDRESS
DECODE
A0-A15
I/O
Computers
Controllers
Intelligent Instruments
Critical μP Power Monitoring
Typical Operating Circuit
+8V
5V
REGULATOR
0.1µF
1N4148
1
0.47F*
3
V
CC
VBATT
5
BATT ON
V
OUT
2
12
CE
OUT
MAX691A
9
MAX693A
CE
IN 13
PFI
MAX800L
MAX800M
4
7
NO
CONNECTION
8
GND
WDI
OSC IN
PFO
OSC SEL
LOW LINE WDO
6
14
*MaxCap
RESET
11
10
15
Pin Configuration
TOP VIEW
VBATT 1
V
OUT
2
V
CC
3
GND 4
BATT ON 5
LOW LINE
6
OSC IN 7
OSC SEL 8
16 RESET
15
RESET
14
WDO
13
CE
IN
12
CE
OUT
11 WDI
10
PFO
9
PFI
µP
NMI
RESET
AUDIBLE
ALARM
MAX691A
MAX693A
MAX800L
MAX800M
SYSTEM STATUS INDICATORS
MaxCap is a registered trademark of Kanthal Globar, Inc.
DIP/SO/TSSOP
19-0094; Rev 13; 11/17
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
