MAX791M(1995) 查看數據表（PDF） - Maxim Integrated
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MAX791M Datasheet PDF : 20 Pages
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Microprocessor Supervisory Circuit
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 4.75V to 5.5V, VBATT = 2.8V, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
BATT ON Output
Low Voltage
ISINK = 3.2mA
ISINK = 25mA
BATT ON Output
Sink current
Short-Circuit Current
Source current
1
RESET, LOW-LINE AND WATCHDOG TIMER
–————–
RESET Threshold Voltage
4.50
–————–
RESET Threshold Hysteresis
–——————– –————–
LOWLINE-to-RESET
Threshold Voltage
–————–
VCC-to-RESET Delay
Power down
–——————–
VCC-to-LOWLINE Delay
Power down
–————–
RESET Active Timeout Period
Power up
140
Watchdog Timeout Period
Minimum Watchdog
Timeout Period
SWT connected to VOUT
1.0
4.7nF capacitor connected from SWT to GND
Minimum Watchdog Input
Pulse Width
VIL = 0.8V, VIH = 0.75 x VCC
100
–———–
WDPO Pulse Width
–W—D—P—O–-to-–W—D—O– Delay
–————–
RESET Output Voltage
–————–
RESET Output
Short-Circuit Current
MAX791C, ISINK = 50µA, VCC = 1.0V, VCC falling
MAX791E/M, ISINK = 50µA, VCC = 1.2V, VCC falling
ISINK = 3.2mA, VCC = 4.25V
ISOURCE = 1.6mA, VCC = 5V
3.5
Output source current
–——————–
LOWLINE Output Voltage
ISINK = 3.2mA, VCC = 4.25V
ISOURCE = 1µA, VCC = 5V
3.5
–——————–
LOWLINE Output
Short-Circuit Current
Output source current
–——–
WDO Output Voltage
ISINK = 3.2mA
ISOURCE = 500µA, VCC = 5V
3.5
–——–
WDO Output Short-Circuit Current Output source current
–———–
WDPO Output Voltage
ISINK = 3.2mA
ISOURCE = 1mA
3.5
–———–
WDPO Output
Short-Circuit Current
Output source current
TYP MAX UNITS
0.1
0.4
V
0.7
1.5
60
mA
15
100
µA
4.65 4.75
V
15
mV
150
mV
100
µs
80
µs
200
280
ms
1.6
2.25
sec
10
ms
ns
1
ms
70
ns
0.004 0.3
ns
0.004 0.3
V
0.1
0.4
7
20
mA
0.4
V
15
100
µA
0.4
V
3
10
mA
0.4
V
7
20
mA
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