MAX823 Maxim, MAX823 Datasheet - Page 3

• Manufacturer Part Number: MAX823
• Description: 5-Pin Microprocessor Supervisory Circuits
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
to +3.6V for MAX82_S, V
T
Note 1: Over-temperature limits are guaranteed by design and not production tested.
Note 2: The RESET short-circuit current is the maximum pull-up current when RESET is driven low by a µP bidirectional reset pin.
Note 3: WDI is internally serviced within the watchdog period if WDI is left unconnected.
Note 4: The WDI input current is specified as the average input current when the WDI input is driven high or low. The WDI input is
WATCHDOG INPUT (MAX823/MAX824)
MANUAL-RESET INPUT (MAX823/MAX825)
A
RESET Output Voltage
RESET Output Short-Circuit
Current (Note 2)
RESET Output Voltage
V
Watchdog Timeout Period
WDI Pulse Width
WDI Input Threshold (Note 3)
WDI Input Current (Note 4)
MR Input Threshold
MR Pulse Width
MR Noise Immunity (pulse width
with no reset)
MR to Reset Delay
MR Pull-Up Resistance (internal)
CC
CC
= +25°C.) (Note 1)
= +4.75V to +5.5V for MAX82_L, V
to RESET Delay
designed to drive a three-stated-output device with a 10µA maximum leakage current and a maximum capacitive load of
200pF. This output device must be able to source and sink at least 200µA when active.
PARAMETER
5-Pin Microprocessor Supervisory Circuits
_______________________________________________________________________________________
CC
= +2.7V to +3.6V for MAX82_R, T
SYMBOL
I
SOURCE
V
V
t
V
V
t
WDI
V
V
V
V
WD
OH
OH
OL
OL
IH
IH
IL
IL
CC
= +4.5V to +5.5V for MAX82_M, V
MAX82_L/M, V
I
MAX82_T/S/R, V
I
MAX82_L/M, V
I
MAX82_T/S/R, V
I
T
V
T
V
MAX82_L/M, RESET = 0V, V
MAX82_T/S/R, RESET = 0V, V
V
MAX824L/M, MAX825L/M,
V
MAX824T/S/R, MAX825T/S/R,
V
V
V
V
WDI = V
WDI = 0V, time average
SOURCE
SOURCE
SINK
SINK
A
A
CC
CC
CC
CC
CC
RST
IL
CC
= 0°C to +70°C, V
= -40°C to +85°C, V
= 0.4V, V
falling, I
falling, V
> 1.8V, I
= V
= V
= 5V
- V
= 3.2mA
= 1.2mA
RST
RST
CC
CC
= 120µA
= 30µA
, time average
= 100mV
max, I
max, I
SINK
IH
SOURCE
BATT
CC
CC
= 0.8V
CONDITIONS
CC
CC
= 50µA
= V
= V
A
SINK
SINK
= 0V, I
= V
= V
= T
CC
RST
RST
= 150µA
CC
RST
RST
CC
= 3.2mA
= 1.2mA
MIN
= 1V,
SINK
max,
min,
= 1.2V,
max,
min,
CC
to T
CC
= 100µA
= 5.5V
MAX
= 3.6V
CC
, unless otherwise noted. Typical values are at
= +3.15V to +3.6V for MAX82_T, V
V
0.8V
0.8V
0.7V
0.3V
CC
1.12
MIN
-20
1.0
50
35
- 1.5
CC
CC
CC
CC
TYP
1.60
120
100
500
-15
20
52
0.3V
0.7V
MAX
2.40
800
400
160
0.4
0.3
0.3
0.3
0.4
0.3
75
CC
CC
CC
UNITS
sec
= +3V
kΩ
µA
µA
µs
ns
µs
ns
ns
V
V
V
V
3