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MAX801 Datasheet

  • MAX801

  • 8-Pin µP Supervisory Circuits with ±1.5% Re...

  • maxim   maxim

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19-1086; Rev 0; 6/96
8-Pin 碌P Supervisory Circuits
with 鹵1.5% Reset Accuracy
_______________General Description
The MAX801/MAX808 microprocessor (碌P) supervisory
circuits monitor and control the activities of +5V 碌Ps by
providing backup-battery switchover, low-line indica-
tion, and 碌P reset. Additional features include a watch-
dog for the MAX801 and CMOS RAM write protection
for the MAX808.
The MAX801/MAX808 offer a choice of reset-threshold
voltage (denoted by suffix letter): 4.675V (L), 4.575V
(N), and 4.425V (M). These devices are available in
8-pin DIP and SO packages.
____________________________Features
o
Precision Voltage Monitoring, 鹵1.5% Reset
Accuracy
o
200ms Power-OK/Reset Time Delay
o
RESET Output (MAX808)
RESET and RESET Outputs (MAX801)
o
Watchdog Timer (MAX801)
o
On-Board Gating of Chip-Enable Signals (MAX808):
Memory Write-Cycle Completion
3ns CE Gate Propagation Delay
o
1碌A(chǔ) Standby Current
o
Power Switching:
250mA in V
CC
Mode
20mA in Battery-Backup Mode
o
MaxCap鈩?SuperCap鈩?Compatible
o
RESET Guaranteed Valid to V
CC
= 1V
o
Low-Line Threshold 52mV Above Reset
Threshold
MaxCap is a trademark of The Carborundum Corp.
SuperCap is a trademark of Baknor Industries.
MAX801L/M/N, MAX808L/M/N
________________________Applications
Computers
Controllers
Intelligent Instruments
Critical 碌P Power Monitoring
Portable/Battery-Powered Equipment
Embedded Systems
______________Ordering Information
Pin Configurations appear at end of data sheet.
PART*
MAX801_CPA
MAX801_CSA
MAX801_EPA
MAX801_ESA
MAX801_MJA
MAX808_CPA
MAX808_CSA
MAX808_EPA
碌P
POWER
TEMP. RANGE
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
-40擄C to +85擄C
-55擄C to +125擄C
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
-40擄C to +85擄C
-55擄C to +125擄C
PIN-PACKAGE
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 CERDIP**
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 CERDIP**
__________Typical Operating Circuit
+5V
0.1碌F
0.1碌F
V
CC
OUT
POWER FOR
CMOS RAM
NMI
RESET
MAX808_ESA
MAX808_MJA
BATT
0.1碌F
LOWLINE
RESET
碌P SYSTEM
MAX808
CE IN
CE OUT
GND
FROM I/O SYSTEM OR
ADDRESS DECODER
TO CMOS RAM
* These parts offer a choice of reset threshold voltage. From the
table below, select the suffix corresponding to the desired
threshold and insert it into the blank to complete the part number.
**Contact factory for availability and processing to MIL-STD-883.
RESET THRESHOLD (V)
SUFFIX
L
N
M
MIN
4.60
4.50
4.35
TYP
4.675
4.575
4.425
MAX
4.75
4.65
4.50
1
________________________________________________________________
Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

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