19-0094; Rev 11; 8/08
Microprocessor Supervisory Circuits
General Description
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 pro-
tection of CMOS RAM or EEPROM, separate watchdog
outputs, backup-battery switchover, and a
RESET
out-
put 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
o
200ms Power-OK/Reset Timeout Period
o
1µA Standby Current, 30µA Operating Current
o
On-Board Gating of Chip-Enable Signals,
10ns max Delay
o
MaxCap
®
or SuperCap Compatible
o
Guaranteed
RESET
Assertion to V
CC
= +1V
o
Voltage Monitor for Power-Fail or Low-Battery
Warning
o
Power-Fail Accuracy Guaranteed to ±2%
(MAX800L/M)
o
Available in 16-Pin Narrow SO, Plastic
DIP, and TSSOP Packages
MAX691A/MAX693A/MAX800L/MAX800M
________________________Applications
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical µP Power Monitoring
PART
MAX691ACUE
MAX691ACSE
MAX691ACWE
MAX691ACPE
MAX691AC/D
MAX691AEUE
MAX691AESE
0.1μF
Ordering Information
TEMP RANGE
-0°C to +70°C
-0°C to +70°C
-0°C to +70°C
-0°C to +70°C
-0°C to +70°C
-0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
16 TSSOP
16 Narrow SO
16 Wide SO
16 Plastic DIP
Dice*
16 TSSOP
16 Narrow SO
16 Wide SO
16 Plastic DIP
Typical Operating Circuit
+8V
5V
REGULATOR
MAX691AEWE
MAX691AEPE
1N4148
1
0.47F*
3
V
CC
VBATT
5
BATT ON
V
OUT
CE OUT
2
12
CMOS RAM
Ordering Information continued on last page.
*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 adding
the + symbol at the end of the part number when ordering.
Lead free not available for CERDIP package.
ADDRESS
DECODE
TOP VIEW
9
4
7
NO
CONNECTION
8
MAX691A
MAX693A
CE IN 13
PFI
MAX800L
MAX800M
GND
WDI
OSC IN
PFO 10
OSC SEL
LOW LINE WDO
6
14
RESET
15
11
Pin Configuration
A0-A15
I/O
VBATT 1
V
OUT
2
V
CC
3
GND 4
BATT ON 5
LOW LINE 6
16 RESET
15 RESET
14 WDO
μP
NMI
RESET
AUDIBLE
ALARM
MAX691A
MAX693A
MAX800L
MAX800M
13 CE IN
12 CE OUT
11 WDI
10 PFO
9
PFI
OSC IN 7
OSC SEL 8
*MaxCap
SYSTEM STATUS INDICATORS
DIP/SO/TSSOP
MaxCap is a registered trademark of Kanthal Globar, Inc.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
