Datasheet

MAX6887/MAX6888
Hex/Quad, Power-Supply Supervisory Circuits
_______________________________________________________________________________________ 3
Note 1: 100% production tested at T
A
= +25°C and T
A
= +85°C. Specifications at T
A
= -40°C are guaranteed by design.
Note 2: Device may be supplied from any one of IN1–IN4 or V
CC
.
Note 3: The internal supply voltage, measured at V
CC
, equals the maximum of IN1–IN4.
Note 4: Versions Q and R require that power be applied through V
CC
.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN1
–V
IN4
or V
CC
= 2.7V to 5.8V, WDI = GND, MARGIN = MR = BP, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
V
IL
0.6
MR, MARGIN, WDI Input Voltage
V
IH
1.4
V
MR Input Pulse Width t
MR
1µs
MR Glitch Rejection
100
ns
MR to RESET or OV Delay t
D-MR
200
ns
MR to Internal BP Pullup Current I
MR
V
MR
= 1.4V 5 10 15 µA
MARGIN to Internal BP Pullup
Current
I
MARGIN
V
MARGIN
= 1.4V 5 10 15 µA
WDI Pulldown Current I
WDI
V
WDI
= 0.6V 5 10 15 µA
WDI Input Pulse Width 50 ns
t
WDI
Initial
92.16 102.4 112.64
Watchdog Timeout Period
t
WD
Normal
1.44
1.6
1.76
s
Typical Operating Characteristics
(V
IN1
–V
IN4
or V
CC
= 5V, WDI = GND, MARGIN = MR = BP, T
A
= +25°C, unless otherwise noted.)
IN1–IN4 SUPPLY CURRENT
vs. IN1–IN4 SUPPLY VOLTAGE
MAX6887 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.64.63.6
0.75
0.80
0.85
0.90
0.95
1.00
0.70
2.6
T
A
= +85
°
C
T
A
= +25
°
C
T
A
= -40°C
V
CC
SUPPLY CURRENT
vs. V
CC
SUPPLY VOLTAGE
MAX6887 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.64.63.6
0.75
0.80
0.85
0.90
0.95
1.00
0.70
2.6
T
A
= +85
°
C
T
A
= +25
°
C
T
A
= -40°C
TIMEOUT PERIOD (ms)
185
190
195
200
210
205
215
220
180
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6887 toc03
TEMPERATURE (°C)
603510-15-40 85