MAX820 データシートの表示（PDF） - Maxim Integrated
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MAX820 Datasheet PDF : 16 Pages
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Microprocessor and Nonvolatile
Memory Supervisory Circuits
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 2.75V to 5.5V, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
LOW-LINE COMPARATOR
Low-Line Threshold Voltage
(Internal Threshold Mode)—VTH
Low-Line Threshold Voltage
(External Programming Mode)
Low-Line Hysteresis
(Internal Threshold Mode)
LLIN/REFOUT Leakage Current
External Programming Mode
Low-Line Comparator Delay
LOWLINE Voltage
LOWLINE Short-Circuit Current
WATCHDOG FUNCTION
Watchdog Timeout Period
Watchdog Input Pulse Width
WDO Output Voltage
WDPO to WDO Delay
WDPO Duration
WDPO Output Voltage
WDI Threshold Voltage
WDI Input Current
CONDITIONS
MAX792/MAX820L/M
MAX792/MAX820R/S/T
MAX792, VCC = 5V OR VCC = 3V
MAX820, VCC = 5V OR VCC = 3V
VCC falling
ISINK = 3.2mA
ISOURCE = 1µA
Output source current, VCC = 5.5V
SWT connected to VCC, VCC = 5V
SWT connected to VCC, VCC = 3V
4.7nF capacitor connected from SWT to GND,
VCC = 3V
4.7nF capacitor connected from SWT to GND,
VCC = 5V
VIL = 0V, VIH = VCC
VCC = 5V
VCC = 3V
ISINK = 50µA, VCC = 1V, VCC falling
ISINK = 1.6mA
ISOURCE = 1mA
ISOURCE = 100µA
ISINK = 50µA, VCC = 1V, VCC falling
ISINK = 1.6mA
ISOURCE = 1mA
ISOURCE = 100µA
VCC = 4.25V
VIH
VIL
VCC = 2.55V
VIH
VIL
MIN
TYP MAX
50
40
1.25
1.274
120
210
100
210
1.30 1.35
1.30 1.326
20
±0.01 ±25
450
0.4
VCC - 1
10
50
1.00
1.60 2.25
1.00
1.60 2.25
70
100
100
300
0.01
0.1
VCC - 1
VCC - 0.5
70
0.5
1.7
0.01
0.1
VCC - 1
VCC - 0.5
0.75 x VCC
0.9 x VCC
0.30
0.4
6.0
0.3
0.4
0.8
0.2
±1
UNITS
mV
V
mV
nA
µs
V
µA
sec
ms
ns
V
ns
ms
V
V
µA
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