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MAX800 Datasheet

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  • Microprocessor Supervisory Circuits

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  • maxim   maxim

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19-0094; Rev 7a; 12/96
Microprocessor Supervisory Circuits
_______________General Description
The MAX691A/MAX693A/MAX800L/MAX800M micro-
processor (碌P) supervisory circuits are pin-compatible
upgrades to the MAX691, MAX693, and MAX695. They
improve performance with 30碌A 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/MAX800M鈥檚 reset threshold is 4.4V
typical. The MAX800L/MAX800M guarantee power-fail
accuracies to 卤2%.
____________________________Features
o
200ms Power-OK/Reset Timeout Period
o
1碌A Standby Current, 30碌A Operating Current
o
On-Board Gating of Chip-Enable Signals,
10ns Max Delay
o
MaxCap
鈩?/div>
or SuperCap
鈩?/div>
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 卤2%
(MAX800L/M)
o
Available in 16-Pin Narrow SO and Plastic
DIP Packages
MAX691A/MAX693A/MAX800L/MAX800M
________________________Applications
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical 碌P Power Monitoring
______________Ordering Information
PART
MAX691ACPE
MAX691ACSE
MAX691ACWE
MAX691AC/D
TEMP. RANGE
0掳C to +70掳C
0掳C to +70掳C
0掳C to +70掳C
0掳C to +70掳C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
16 Wide SO
Dice*
__________Typical Operating Circuit
+8V
5V
REGULATOR
0.1碌F
3
V
CC
1
VBATT
CE OUT
0.47F*
9
4
7
NO
CONNECTION
8
5
BATT ON
MAX691AEPE
-40掳C to +85掳C
16 Plastic DIP
MAX691AESE
-40掳C to +85掳C
16 Narrow SO
MAX691AEWE
-40掳C to +85掳C
16 Wide SO
MAX691AEJE
-40掳C to +85掳C
16 CERDIP
MAX691AMJE
-55掳C to +125掳C
16 CERDIP
Ordering Information continued on last page.
* Dice are specified at T
A
= +25 掳C, DC parameters only.
1N4148
V
OUT
2
12
CMOS RAM
__________________Pin Configuration
TOP VIEW
VBATT 1
V
OUT
2
A0-A15
I/O
V
CC
3
GND 4
BATT ON 5
LOW LINE 6
OSC IN 7
OSC SEL 8
AUDIBLE
ALARM
16 RESET
15 RESET
14 WDO
MAX691A
MAX693A
CE IN 13
PFI
MAX800L
MAX800M
GND
WDI
OSC IN
PFO
OSC SEL
LOW LINE WDO
6
14
RESET
15
10
11
ADDRESS
DECODE
碌P
NMI
RESET
MAX691A
MAX693A
MAX800L
MAX800M
13 CE IN
12 CE OUT
11 WDI
10 PFO
9
PFI
*MaxCap
SYSTEM STATUS INDICATORS
DIP/SO
SuperCap is a registered trademark of Baknor Industries. MaxCap is a registered trademark of The Carborundum Corp.
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.

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