MAX691A MAXIM [Maxim Integrated Products], MAX691A Datasheet - Page 4

• Manufacturer Part Number: MAX691A
• Description: Microprocessor Supervisory Circuits
• Manufacturer: MAXIM [Maxim Integrated Products]

Microprocessor Supervisory Circuits
ELECTRICAL CHARACTERISTICS (continued)
(MAX691A, MAX800L: V
unless otherwise noted.)
4
Note 1: Either V
Note 2: The supply current drawn by the MAX691A/MAX800L/MAX800M from the battery excluding I
Note 3: “+” = battery-discharging current, “--” = battery-charging current.
Note 4: Although presented as typical values, the number of clock cycles for the reset and watchdog timeout periods are fixed and
Note 5: RESET is an open-drain output and sinks current only.
Note 6: WDI is internally connected to a voltage divider between V
Note 7: The chip-enable resistance is tested with V
Note 8: The chip-enable propagation delay is measured from the 50% point at CE IN to the 50% point at CE OUT.
POWER-FAIL COMPARATOR
CHIP-ENABLE GATING
INTERNAL OSCILLATOR
PFI Input Threshold
PFI Leakage Current
PFO Output Voltage
PFO Output Short-Circuit
Current
PFI-to-PFO Delay
CE IN Leakage Current
CE IN-to-CE OUT Resistance
(Note 7)
CE OUT Short-Circuit Current
(Reset Active)
CE IN-to-CE OUT Propagation
Delay (Note 8)
CE OUT Output Voltage High
(Reset Active)
RESET-to-CE OUT Delay
OSC IN Leakage Current
OSC IN Input Pull-Up Current
OSC SEL Input Pull-Up Current
OSC IN Frequency Range
OSC IN External Oscillator
Threshold Voltage
OSC IN Frequency with
External Capacitor
_______________________________________________________________________________________
PARAMETER
when (VBATT - 1V) < V
do not vary with process or temperature.
disabling the watchdog function.
MAX693A/MAX800M. CE IN = CE OUT = V
CC
or VBATT can go to 0V, if the other is greater than 2.0V.
CC
= +4.75V to +5.5V, MAX693A, MAX800M: V
CC
MAX69_AC/AE/AM, V
MAX800_C/E, V
I
I
Output source current
V
V
Disable mode
Enable mode
Disable mode,
50Ω source impedance driver, C
V
V
Power-down
OSC SEL = 0V
OSC SEL = V
OSC SEL = 0V
OSC SEL = 0V
V
V
OSC SEL = 0V, COSC = 47pF
SINK
SOURCE
< VBATT. In most applications, this is a brief period as V
IN
IN
CC
CC
IH
IL
= -20mV, V
= 20mV, V
= 5V, I
= 0V, VBATT = 2.8V, I
= 3.2mA
= 1µA, V
OUT
OUT
OD
OD
–
CE OUT = 0V
CC
= -100µA
CONDITIONS
CC
CC
CC
= 15mV
or floating, OSC IN = 0V
= 15mV
= 5V
= +4.75V for the MAX691A/MAX800L and V
/ 2.
= 5V
CC
= 5V
OUT
= 1µA
LOAD
OUT
and GND. If unconnected, WDI is driven to 1.6V (typ),
= 50pF
CC
= +4.5V to +5.5V, VBATT = 2.8V, T
V
OUT
1.225
MIN
1.2
3.5
0.1
3.5
2.7
1
- 0.3 V
CC
falls through this region.
CC
OUT
±0.005
±0.01
TYP
1.25
1.25
0.75
0.10
3.65
100
OUT
15
25
60
75
12
10
10
50
= +4.5V for the
6
- 0.6
typically goes to 10µA
MAX
1.275
A
2.00
±25
100
150
100
100
1.3
0.4
2.0
±1
±5
10
= T
MIN
UNITS
to T
kHz
kHz
mA
nA
µA
µA
µA
µA
µA
µs
ns
µs
Ω
V
V
V
V
MAX
,