Full-Featured µP Supervisory Circuit with
±1.5% Reset Accuracy
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 4.60V to 5.5V for the MAX807L, VCC = 4.50V to 5.5V for the MAX807N, VCC = 4.35V to 5.5V for the MAX807M,
VBATT = 2.8V, VPFI = 0V, TA = TMIN to TMAX. Typical values are tested with VCC = 5V and TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX UNITS
BATT ON Output
Sink current
Short-Circuit Current
Source current, VCC = 0V, VBATT = 2.8V
RESET, LOW LINE, AND WATCHDOG TIMER
70
mA
5
MAX807L
4.600
4.675 4.750
Reset Threshold
VRST VCC rising and falling
MAX807N
MAX807M
4.500
4.575 4.650
V
4.350
4.425 4.500
Reset Threshold Hysteresis
13
mV
LOW LINE to RESET
Threshold Voltage
VLR VCC falling
30
52
70
mV
LOW LINE Threshold,
VCC Rising
MAX807L
VLL MAX807N
MAX807M
4.73 4.81
4.63 4.71
V
4.48 4.56
VCC to RESET Delay
VCC to LOW LINE Delay
VCC falling at 1mV/µs
VCC falling at 1mV/µs
26
µs
24
µs
RESET Active-Timeout Period
Watchdog-Timeout Period
Minimum Watchdog Input
Pulse Width
tRP
VCC rising
tWD
VIL = 0.8V, VIH = 0.75 x VCC
140
200
280
ms
1.12
1.6
2.24
s
100
ns
RESET Output Voltage
ISINK = 50µA,
VBATT = 0V, VCC falling
VCC = 1V,
MAX807_C
VCC = 1.2V,
MAX807_E/M
0.3
0.3
V
RESET Output
Short-Circuit Current
RESET Output Voltage
RESET Output
Short-Circuit Current
LOW LINE Output Voltage
LOW LINE Output
Short-Circuit Current
WDO Output Voltage
WDO Output
Short-Circuit Current
WDI Threshold Voltage
(Note 4)
WDI Input Current
ISINK = 3.2mA, VCC = 4.25V
ISOURCE = 0.1mA
ISC
Output sink current, VCC = 4.25V
Output source current
ISINK = 3.2mA
ISOURCE = 5mA
Output sink current
ISC
Output source current, VCC = 4.25V
ISINK = 3.2mA, VCC = 4.25V
ISOURCE = 5mA
ISC
Output sink current, VCC = 4.25V
Output source current
ISINK = 3.2mA
ISOURCE = 5mA
Output sink current
ISC
Output source current
VIH
VIL
VIH Reset deasserted, WDI = 0V
Reset deasserted, WDI = VCC
0.1
0.4
VCC - 1.5 VCC - 0.1
60
mA
1.6
VCC - 1.5
0.4
V
60
mA
15
VCC - 1.5
0.4
V
28
mA
20
VCC - 1.5
0.4
V
35
mA
20
0.75 x VCC
V
0.8
-50
-10
µA
16
50
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