Electrical characteristics (continued) – Rainbow Electronics MAX6869 User Manual
Page 3
MAX6854–MAX6869
Nanopower µP Supervisory Circuits with
Optional Manual Reset, Watchdog Timer
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 1.2V to 5.5V, T
A
= -40°C to +85°C, unless otherwise specified. Typical values are at V
CC
= 2.5V, T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
CC
≥
1.1V, I
SOURCE
= 10µA,
RESET asserted, T
A
≥
0°C
0.8 x V
CC
V
CC
≥
1.2V, I
SOURCE
= 10µA,
RESET asserted
0.8 x V
CC
V
CC
≥
1.53V, I
SOURCE
= 200µA,
RESET asserted
0.8 x V
CC
V
OH
V
CC
≥
2.12V, I
SOURCE
= 500µA,
RESET asserted
0.8 x V
CC
V
CC
≥
1.71V, I
SINK
= 500µA,
RESET deasserted
0.3
RESET Output Voltage
V
OL
V
CC
≥
2.38V, I
SINK
= 1.2mA,
RESET deasserted
0.3
V
CT Input Current
CT = GND or V
CC
20
nA
V
IH
0.8 x V
CC
CT Input Voltage
V
IL
0.2 x V
CC
V
MANUAL RESET INPUT
V
IH
0.7 x V
CC
MR Input Voltage
V
IL
0.3 x V
CC
V
MR Minimum Pulse Width
t
MPW
1
µs
MR Glitch Rejection
200
ns
MR to Reset Delay
t
MRD
250
ns
MR Pullup Resistance
5
10
20
k
Ω
WATCHDOG TIMER (MAX6864–MAX6869)
V
IH
0.7 x V
CC
WDI Input Voltage
V
IL
0.3 x V
CC
V
WDI Input Current
WDI = GND or V
CC
20
nA
WDI Pulse Width
t
WDI
(Note 3)
150
ns
S
1.5
3.3
7.75
Watchdog Timeout Period
t
WD
L
95
209
487
s
Note 1: Devices are tested at T
A
= +25°C. Specifications for T
A
= -40°C to +85°C are guaranteed by design.
Note 2: For the MAX6864–MAX6869, the watchdog period is 1s with t
RISE
and t
FALL
< 50ns.
Note 3: Guaranteed by design.