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MAX792LEJE Datasheet

  • MAX792LEJE

  • Maxim Integrated Products [Microprocessor and Non-Volatile ...

  • 250.67KB

  • MAXIM   MAXIM

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19-0147; Rev. 3; 4/00
Microprocessor and Nonvolatile
Memory Supervisory Circuits
General Description
The MAX792/MAX820 microprocessor (碌P) supervisory
circuits provide the most functions for power-supply
and watchdog monitoring in systems without battery
backup. Built-in features include the following:
鈥?碌P reset: Assertion of RESET and
RESET
outputs during
power-up, power-down, and brownout conditions.
RESET
is guaranteed valid for V
CC
down to 1V.
鈥?Manual-reset input.
鈥?Two-stage power-fail warning: A separate low-line
comparator compares V
CC
to a preset threshold
120mV above the reset threshold; the low-line and
reset thresholds can be programmed externally.
鈥?Watchdog fault output: Assertion of
WDO
if the watchdog
input is not toggled within a preset timeout
period.
鈥?Pulsed watchdog output: Advance warning of
impending
WDO
assertion from watchdog timeout that
causes hardware shutdown.
鈥?Write protection of CMOS RAM, EEPROM, or other
memory devices.
The MAX792 and MAX820 are identical, except the
MAX820 guarantees higher low-line and reset threshold
accuracy (卤2%).
o
Manual-Reset Input
o
200ms Power-OK / Reset Time Delay
o
Independent Watchdog Timer鈥擯reset or Adjustable
o
On-Board Gating of Chip-Enable Signals
o
Memory Write-Cycle Completion
o
10ns (max) Chip-Enable Gate Propagation Delay
o
Voltage Monitor for Overvoltage Warning
o
卤2% Reset and Low-Line Threshold Accuracy
(MAX820, external programming mode)
Features
MAX792/MAX820
Ordering Information
PART**
MAX792_CPE
MAX792_CSE
MAX792_C/D
TEMP. RANGE
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
Dice*
Ordering Information continued at end of data sheet.
* Dice are tested at T
A
= +25掳C, DC parameters only.
**These parts offer a choice of five different reset threshold volt-
ages. Select the letter corresponding to the desired nominal
reset threshold voltage and insert it into the blank to complete the
part number.
SUFFIX
L
M
T
S
R
RESET THRESHOLD (V)
4.62
4.37
3.06
2.91
2.61
Applications
Computers
Controllers
Intelligent Instruments
Critical 碌P Power Monitoring
Typical Operating Circuit
3
V
CC
4
CE OUT
RESET IN/INT
0.1碌F
13
V
CC
V
CC
碌P
MAX792
5
LLIN/
REFOUT
CE IN
OVO
LOW LINE
7
8
OVI
SWT
GND
12
RESET
MR
14
6
10
1
9
GND
NMI
RESET
ADDRESS
DECODER
RAM
A0-A15
________________________________________________________________
Maxim Integrated Products
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.

MAX792LEJE PDF文件相关型号

MAX792LEPE,MAX792LMJE,MAX792MCSE,MAX792MESE,MAX792MMJE,MAX792REPE,MAX792RESE,MAX792SCSE,MAX820MCPE,MAX820RMJE

MAX792LEJE 产品属性

  • Maxim Integrated Products

  • 1

  • 2.75 V to 5.5 V

  • 4.5 V

  • 4.75 V

  • Active High, Active Low, Push-Pull

  • Resettable

  • Watchdog

  • No Backup

  • 280 ms

  • 5.5 V

  • 2.75 V

  • 150 uA

  • 800 mW

  • + 85 C

  • Through Hole

  • CDIP N

  • - 40 C

  • Yes

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