MAX16016/MAX16020/MAX16021
Low-Power µP Supervisory Circuits with
Battery-Backup Circuit and Chip-Enable Gating
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 1.53V to 5.5V, V
BATT
= 3V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
WATCHDOG TIMER (WDI, WDO)
Watchdog Timeout Period t
WD
0.83 1.235 1.64 s
Minimum WDI Input Pulse Width t
WDI
320 ns
WDI Input Low Voltage V
IL
(Note 6)
0.3 x
V
CC
V
WDI Input High Voltage V
IH
(Note 6)
0.7 x
V
CC
V
WDI Input Current (Note 7) V
WDI
= 0V or 5.5V, time average -1 +1 µA
WDO Output Low Voltage V
OL
V
CC
= 5.0V, I
SINK
= 1mA, WDO asserted 0.3 V
WDO Output High Voltage
(Push-Pull Output)
V
OH
V
CC
= 1.1 x V
TH
, I
SOURCE
= 100µA, WDO
deasserted
V
OUT
- 0.3
V
WDO Leakage Current
(Open-Drain Output)
V
WDO
= 5.5V, WDO deasserted 1 µA
BATTERY-ON INDICATOR (BATTON)
Output Low Voltage V
OL
I
SINK
= 3.2mA, V
BATT
= 2.1V 0.3 V
BATTON Leakage Current V
BATTON
= 5.5V 1 µA
BATTON Output High Voltage V
OH
V
CC
= 0.9 x V
TH
, I
SOURCE
= 100µA,
BATTON asserted
V
OUT
- 0.3
V
Output Short-Circuit Current
(Note 4)
Sink current, V
CC
= 5V 60 mA
CE GATING (CEIN, CEOUT)
CEIN Leakage Current Reset asserted, V
CC
= 0.9 x V
TH
or 0V -1 +1 µA
CEIN to CEOUT Resistance Reset not asserted (Note 5) 8 50 Ω
CEOUT Short-Circuit Current
Reset asserted, CEOUT = 0,
V
CC
= 0.9 x V
TH
0.75 2 mA
CEIN to CEOUT Propagation
Delay
50Ω source, C
LOAD
= 50pF, V
CC
= 4.75V 1.5 7 ns
V
CC
= 5V, V
CC
≥ V
BATT
, I
SOURCE
= 100µA
0.8 x
V
CC
Output High Voltage
V
CC
= 0V, V
BATT
≥ 2.2V, I
SOURCE
= 1µA
V
BATT
-
0.1
V
Reset to CEOUT Delay 12 µs
