MAX690 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX690 Datasheet PDF : 18 Pages
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MAX690–MAX695
Microprocessor Supervisory Circuits
Electrical Characteristics (continued)
VCC = full operating range, VBATT = 2.8V, TA = +25°C, unless otherwise noted.)
PARAMETER
Battery Switchover Hysteresis
BATT ON Output Voltage
BATT ON Output Short-Circuit Current
RESET AND WATCHDOG TIMER
Reset Voltage Threshold
Reset Threshold Hysteresis
Reset Timeout Delay (MAX690/MAX691/
MAX692/MAX693)
Reset Timeout Delay (MAX694/MAX695)
Watchdog Timeout Period, Internal Oscillator
Watchdog Timeout Period, External Clock
Minimum WDI Input Pulse Width
RESET and LOW LINE Output Voltage
RESET and WDO Output Voltage
Output Short-Circuit Current
WDI Input Threshold Logic-Low
WDI Input Threshold Logic-High
WDI Input Current
POWER-FAIL DETECTOR
PFI Threshold
PFI Current
PFO Output Voltage
PFO Short Circuit Source Current
CONDITIONS
ISINK = 3.2mA
BATT ON = VOUT = 4.5V sink current
BATT ON = 0V source current
TA = full
operating range
MAX690, MAX691,
MAX694, MAX695
MAX692, MAX693
Figure 6, OSC SEL HIGH, VCC = 5V
Figure 6, OSC SEL HIGH, VCC = 5V
Long period, VCC = 5V
Short period, VCC = 5V
Long period
Short period
VIL = 0.4, VIH = 0.8VCC
ISINK = 1.6mA, VCC = 4.25V
ISOURCE = 1µA, VCC = 5V
ISINK = 1.6mA
ISOURCE = 1µA, VCC = 5V
RESET, RESET, WDO, LOW LINE
VCC = 5V (Note 2)
VCC = 5V (Note 2)
WDI = VOUT
WDI = 0V
VCC = 5V, TA = full
ISINK = 3.2mA
ISOURCE = 1µA
PFI = VIH, PFO = 0V
MIN TYP MAX UNITS
20
mV
0.4
V
25
mA
0.5
1
25
µA
4.5
4.65 4.75
V
4.25
4.4
4.5
40
mV
35
50
70
ms
140
200
280
ms
1.0
1.6 2.25
s
70
100
140
ms
3840
768
4097
1025
Clock
Cycles
200
ns
0.4
V
3.5
0.4
V
3.5
1
3
25
µA
0.8
V
3.5
20
50
µA
-50
-15
1.2
1.3
1.4
V
±0.01 ±25
nA
0.4
V
3.5
V
1
3
25
µA
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