MAX807NCPE Maxim Integrated, MAX807NCPE Datasheet - Page 7

• Manufacturer Part Number: MAX807NCPE
• Description: Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: MAX807L, MAX807M, MAX807Nr

Specifications of MAX807NCPE

• Number Of Voltages Monitored: 1
• Monitored Voltage: 4.575 V
• Undervoltage Threshold: 4.5 V
• Overvoltage Threshold: 4.65 V
• Output Type: Active High, Active Low
• Manual Reset: Resettable
• Watchdog: Watchdog
• Battery Backup Switching: Backup
• Power-up Reset Delay (typ): 280 ms
• Supply Voltage - Max: 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP N
• Chip Enable Signals: Yes
• Maximum Power Dissipation: 842 mW
• Minimum Operating Temperature: 0 C
• Power Fail Detection: Yes
• Supply Current (typ): 70 uA
• Supply Voltage - Min: 0 V

PIN
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
LOW LINE
BATT ON
BATT OK
CE OUT
RESET
RESET
NAME
CE IN
WDO
BATT
GND
PFO
OUT
V
WDI
PFI
MR
CC
Full-Featured µP Supervisory Circuit with
_______________________________________________________________________________________
Power-Fail Input. When PFI is less than V
Power-Fail Output. This CMOS-logic output goes low when PFI is less than V
V
Input Supply Voltage, nominally +5V. Bypass with a 0.1µF capacitor to GND.
Watchdog Input. If WDI remains high or low longer than the watchdog-timeout period (1.6s, typ), WDO
goes low. Leave unconnected to disable the watchdog function.
Ground
Manual-Reset Input. A logic low on MR asserts reset. Reset remains asserted as long as MR remains low
and for 200ms after MR returns high. MR is an active-low input with an internal pullup to V
driven using TTL or CMOS logic, or shorted to ground with a switch. Connect to V
nected if not used.
Low-Line Comparator Output. This CMOS-logic output goes low when V
threshold. Use this output to generate an NMI to initiate an orderly shutdown routine when V
LOW LINE swings between V
Active-High Reset Output. RESET is the inverse of RESET. It is a CMOS output that sources and sinks
current. RESET swings between V
Active-Low Reset Output. RESET is triggered and stays low when V
when MR is low. It remains low 200ms after V
RESET has a strong pulldown but a relatively weak pullup, and can be wire-OR connected to logic gates.
Valid for V
Watchdog Output. This CMOS-logic output goes low if WDI remains high or low longer than the watch-
dog-timeout period (t
unconnected. WDO is high during reset. WDO swings between V
generate resets during watchdog faults.
Chip-Enable Output. Output to the chip-enable gating circuit. CE OUT is pulled up to the higher of V
or V
Chip-Enable Input
Battery-On Output. CMOS-logic output/external bypass switch driver. High when OUT is connected to
BATT and low when OUT is connected to V
transistor to BATT ON for I
V
Backup-Battery Input. When V
BATT. V
BATT is bypassed with a 0.1µF capacitor to GND. If no battery is used, connect BATT to ground, and
connect V
Battery-OK Signal Output. High in normal operating mode when V
V
Output Supply Voltage to CMOS RAM. When V
connected to V
OUT with a 0.1µF capacitor to GND.
CC
CC
CC
BATT
≥ 4V. PFO swings between V
and V
≥ 4V.
BATT
, when the chip-enable gate is disabled.
CC
CC
BATT
may exceed V
and OUT together.
≥ 1V. RESET swings between V
CC
and GND.
. When V
WD
), and remains low until the next transition of WDI. WDO remains high if WDI is
OUT
CC
CC
CC
CC
falls below the reset threshold and V
. The battery can be removed while the MAX807 is powered-up, provided
requirements exceeding 250mA. BATT ON swings between the higher of
and GND.
CC
falls below the reset threshold and V
CC
and GND.
and GND.
PFT
±1.5% Reset Accuracy
CC
(2.265V), PFO goes low. Connect to ground when unused.
CC
CC
. Connect the base of a PNP transistor or gate of a PMOS
FUNCTION
CC
rises above the reset threshold or MR returns high.
and GND.
exceeds the reset threshold or V
CC
BATT
BATT
CC
and GND. Connect WDO to MR to
BATT
is below the reset threshold or
exceeds V
, OUT connects to BATT. Bypass
CC
, OUT switches from V
falls to 52mV above the reset
PFT
Pin Description
(2.265V). Valid for
CC
BOK
CC
, or leave uncon-
> V
(2.265V). Valid for
CC
BATT
CC
. It can be
, OUT is
is falling.
CC
CC
to
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