Datasheet
PROPAGATION DELAY (µs)
1.25
1.50
1.75
2.00
2.50
2.25
2.75
3.00
1.00
MR TO RESET OUTPUT PROPAGATION
DELAY vs. TEMPERATURE
MAX6887 toc09
TEMPERATURE (
°
C)
603510-15-40 85
MAX6887/MAX6888
Hex/Quad, Power-Supply Supervisory Circuits
4 _______________________________________________________________________________________
PROPAGATION DELAY (µs)
21
22
23
24
25
26
27
28
29
30
20
IN_ TO RESET OR OV
PROPAGATION DELAY vs. TEMPERATURE
MAX6887 toc04
TEMPERATURE (
°
C)
603510-15-40 85
100mV OVERDRIVE
TIMEOUT PERIOD (s)
1.525
1.550
1.575
1.600
1.650
1.625
1.675
1.700
1.500
WATCHDOG TIMEOUT PERIOD
vs. TEMPERATURE
MAX6887 toc05
TEMPERATURE (
°
C)
603510-15-40 85
NORMALIZED IN_ THRESHOLD
0.998
0.997
0.996
0.999
1.000
1.001
1.003
1.002
1.004
1.005
0.995
NORMALIZED IN_ THRESHOLD
vs. TEMPERATURE
MAX6887 toc06
TEMPERATURE (
°
C)
603510-15-40 85
100101 1000
MAXIMUM IN_ TRANSIENT
vs. IN_THRESHOLD OVERDRIVE
MAX6887 toc07
IN_ THRESHOLD OVERDRIVE (mV)
MAXIMUM TRANSIENT DURATION (µs)
25
50
75
100
125
150
175
200
0
PO_ ASSERTION OCCURS
ABOVE THIS LINE
OUTPUT-VOLTAGE LOW vs. SINK CURRENT
MAX8667 toc08
SINK CURRENT (mA)
OUTPUT-VOLTAGE LOW (mV)
8624
50
100
150
200
300
250
350
400
0
0101214
Pin Description
PIN
MAX6887
MAX6888
NAME
FUNCTION
11
RESET
Open-Drain, Active-Low Reset Output. RESET asserts when any input voltage falls below its
undervoltage threshold or when MR is pulled low. RESET remains low for 200ms after all
assertion-causing conditions are cleared. An external pullup resister is required.
22WDO
Open-Drain, Active-Low Watchdog Timer Output. Logic output for the watchdog timer function.
WDO goes low when WDI is not strobed high-to-low or low-to-high within the watchdog timeout
period.
33OV
Open-Drain Active-Low Overvoltage Output. OV asserts when any input voltage exceeds its
overvoltage threshold. OV remains low for 25µs after all overvoltage conditions are cleared.
An external pullup resistor is required.
4 4 GND Ground
Typical Operating Characteristics (continued)
(V
IN1
–V
IN4
or V
CC
= 5V, WDI = GND, MARGIN = MR = BP, T
A
= +25°C, unless otherwise noted.)