Rainbow Electronics MAX16021 - Manual (Page 4)

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 = 0 or 5.5V, time average -1 +1 µA
WDO Output Low Voltage V OL
V CC = 1.1 x V TH , 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
50 Ω 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