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MAX807MCPE Datasheet

  • MAX807MCPE

  • Maxim Integrated Products [Full-Featured uP Supervisory Cir...

  • 224.05KB

  • MAXIM

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19-0433; Rev 1; 12/99
Full-Featured 碌P Supervisory Circuit with
卤1.5% Reset Accuracy
General Description
The MAX807 microprocessor (碌P) supervisory circuit
reduces the complexity and number of components
needed to monitor power-supply and battery-control func-
tions in 碌P systems. A 70碌A supply current makes the
MAX807 ideal for use in portable equipment, while a 2ns
chip-enable propagation delay and 250mA output current
capability (20mA in battery-backup mode) make it suit-
able for larger, higher-performance equipment.
The MAX807 comes in 16-pin DIP, SO, and TSSOP pack-
ages, and provides the following functions:
鈥?碌P reset. The active-low RESET output is asserted dur-
ing power-up, power-down, and brownout conditions,
and is guaranteed to be in the correct state for V
CC
down to 1V.
鈥?Active-high RESET output.
鈥?Manual-reset input.
鈥?Two-stage power-fail warning. A separate low-line
comparator compares V
CC
to a threshold 52mV above
the reset threshold. This low-line comparator is more
accurate than those in previous 碌P supervisors.
鈥?Backup-battery switchover for CMOS RAM, real-time
clocks, 碌Ps, or other low-power logic.
鈥?Write protection of CMOS RAM or EEPROM.
鈥?2.275V threshold detector provides for power-fail
warning and low-battery detection, or monitors a
power supply other than +5V.
鈥?BATT OK status flag indicates that the backup-battery
voltage is above +2.275V.
鈥?Watchdog-fault output鈥攁sserted if the watchdog input
has not been toggled within a preset timeout period.
____________________________Features
o
Precision 4.675V (MAX807L) or 4.425V
(MAX807M), or 4.575V (MAX807N) Voltage
Monitoring
o
200ms Power OK/Reset Time Delay
o
RESET and RESET Outputs
o
Independent Watchdog Timer
o
1碌A Standby Current
o
Power Switching
250mA in V
CC
Mode
20mA in Battery-Backup Mode
o
On-Board Gating of Chip-Enable Signals;
2ns CE Gate Propagation Delay
o
MaxCap
庐
and SuperCap
庐
Compatible
o
Voltage Monitor for Power Fail
o
Backup-Battery Monitor
o
Guaranteed RESET Valid to V
CC
= 1V
o
卤1.5% Low-line Threshold Accuracy 52mV above
Reset Threshold
MAX807L/M/N
Pin Configuration
TOP VIEW
PFI 1
PFO 2
V
CC
3
WDI
4
16 OUT
15 BATT OK
14 BATT
Applications
Computers
Controllers
Intelligent Instruments
Critical 碌P Power Monitoring
Portable/Battery-Powered Equipment
MAX807
13 BATT ON
12 CE IN
11 CE OUT
10 WDO
9
RESET
GND 5
MR
LOW LINE
RESET
6
7
8
DIP/SO/TSSOP
Ordering Information and Typical Operating Circuit appear at end of data sheet.
SuperCap is a registered trademark of Baknor Industries. MaxCap is a registered trademark of Cesiwid, Inc.
________________________________________________________________
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.
Powered by ICminer.com Electronic-Library Service CopyRight 2003

MAX807MCPE PDF文件相关型号

MAX807MCUE

MAX807MCPE 产品属性

  • Maxim Integrated Products

  • 1

  • 4.425 V

  • 4.35 V

  • 4.5 V

  • Active High, Active Low

  • Resettable

  • Watchdog

  • Backup

  • 280 ms

  • 5.5 V

  • 0 V

  • 70 uA

  • 842 mW

  • + 70 C

  • Through Hole

  • PDIP N

  • 0 C

  • Yes

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