MAX691A/MAX693A/MAX800L/MAX800M
Microprocessor Supervisory Circuits
4 _______________________________________________________________________________________
MAX69_AC/AE/AM, V
CC
= 5V
µA0.10 ±5OSC IN Leakage Current
µs12
RESET-to-CE OUT Delay
2.7
CE OUT Output-Voltage High
(Reset Active)
3.5
ns610
CE IN-to-CE OUT Propagation
Delay (Note 8)
mA0.1 0.75 2.0
CE OUT Short-Circuit Current
(Reset Active)
Ω75 150
CE IN-to-CE OUT Resistance
(Note 7)
µA±0.005 ±1
CE IN Leakage Current
60
PFI-to-PFO Delay µs
25
µA1 15 100
PFO Output Short-Circuit
Current
MAX800_C/E, V
CC
= 5V
CONDITIONS
3.5
PFO Output Voltage
V
0.4
nA±0.01 ±25PFI Leakage Current
1.225 1.25 1.275
PFI Input Threshold V
1.2 1.25 1.3
UNITSMIN TYP MAXPARAMETER
OSC SEL = 0V
Power-down
V
CC
= 0V, VBATT = 2.8V, I
OUT
= 1µA
V
CC
= 5V, I
OUT
= -100µA
50Ω source impedance driver, C
LOAD
= 50pF
Disable mode,
–
CE OUT = 0V
Enable mode
Disable mode
I
SOURCE
= 1µA, V
CC
= 5V
I
SINK
= 3.2mA
V
IN
= 20mV, V
OD
= 15mV
V
IN
= -20mV, V
OD
= 15mV
Output source current
Note 1: Either V
CC
or VBATT can go to 0V, if the other is greater than 2.0V.
Note 2: The supply current drawn by the MAX691A/MAX800L/MAX800M from the battery excluding I
OUT
typically goes to 10µA
when (VBATT - 1V) < V
CC
< VBATT. In most applications, this is a brief period as V
CC
falls through this region.
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
do not vary with process or temperature.
Note 5: RESET is an open-drain output and sinks current only.
Note 6: WDI is internally connected to a voltage divider between V
OUT
and GND. If unconnected, WDI is driven to 1.6V (typ),
disabling the watchdog function.
Note 7: The chip-enable resistance is tested with V
CC
= +4.75V for the MAX691A/MAX800L and V
CC
= +4.5V for the
MAX693A/MAX800M. CE IN = CE OUT = V
CC
/2.
Note 8: The chip-enable propagation delay is measured from the 50% point at CE IN to the 50% point at CE OUT.
ELECTRICAL CHARACTERISTICS (continued)
(MAX691A, MAX800L: V
CC
= +4.75V to +5.5V; MAX693A, MAX800M: V
CC
= +4.5V to +5.5V; VBATT = 2.8V, T
A
= T
MIN
to T
MAX
,
unless otherwise noted.)
kHz50OSC IN Frequency Range
µA10 100OSC SEL Input Pullup Current
µA10 100OSC IN Input Pullup Current
OSC SEL = 0V
OSC SEL = 0V
OSC SEL = V
OUT
or floating, OSC IN = 0V
V
V
OUT
- 0.3 V
OUT
- 0.6V
IH
3.65 2.00
OSC IN External Oscillator
Threshold Voltage
V
IL
kHz100
OSC IN Frequency with
External Capacitor
OSC SEL = 0V, COSC = 47pF
V
POWER-FAIL COMPARATOR
CHIP-ENABLE GATING
INTERNAL OSCILLATOR
