19-0094; Rev 11; 8/08
Microprocessor Supervisory Circuits
1693L/AX80M
General Description
____________________________Features
o 200ms Power-OK/Reset Timeout Period
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 VCC 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 2ꢀ.
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
= +1V
CC
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
________________________Applications
Ordering Information
Computers
PIN-
PART
TEMP RANGE
Controllers
PACKAGE
Intelligent Instruments
Automotive Systems
Critical µP Power Monitoring
MAX691ACUE
MAX691ACSE
MAX691ACWE
MAX691ACPE
MAX691AC/D
MAX691AEUE
MAX691AESE
MAX691AEWE
MAX691AEPE
-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
16 TSSOP
16 Narrow SO
16 Wide SO
16 Plastic DIP
Dice*
Typical Operating Circuit
16 TSSOP
5V
REGULATOR
16 Narrow SO
16 Wide SO
16 Plastic DIP
+8V
0.1μF
Ordering Information continued on last page.
3
V
5
*Dice are specified at T = +25°C, DC parameters only.
A
1N4148
0.47F*
BATT ON
CC
2
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.
V
OUT
1
VBATT
12
CE OUT
CE IN
CMOS RAM
MAX691A
MAX693A
MAX800L
MAX800M
Pin Configuration
13
11
9
4
7
ADDRESS
DECODE
PFI
TOP VIEW
GND
A0-A15
I/O
μP
VBATT
RESET
RESET
WDO
CE IN
CE OUT
WDI
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
WDI
PFO
V
OUT
OSC IN
V
CC
NO
10
15
NMI
CONNECTION
GND
MAX691A
MAX693A
MAX800L
MAX800M
8
OSC SEL
BATT ON
LOW LINE
OSC IN
RESET
RESET
LOW LINE WDO
6
14
AUDIBLE
ALARM
PFO
OSC SEL
PFI
*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.