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MAX7387 Datasheet(PDF) 3 Page - Maxim Integrated Products

Part # MAX7387
Description  System Monitoring Oscillator with Watchdog and Power Fail
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX7387 Datasheet(HTML) 3 Page - Maxim Integrated Products

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System Monitoring Oscillator with
Watchdog and Power Fail
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, VCC = +2.7V to +5.5V, TA = -40°C to +125°C, 1MHz to 16MHz output frequency range, typical values at
VCC = +5.0V, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLOCK Output Jitter
Observation for 20s using a 500MHz
oscilloscope
310
ps
RMS
Output Rise Time
tR
CLOAD = 10pF, 10% to 90% of full scale (Note 2)
2.5
7.0
ns
Output Fall Time
tF
CLOAD = 10pF, 90% to 10% of full scale (Note 2)
2.8
7.5
ns
INTERNAL POWER-ON RESET
TA = +25°C
VTH
- 1.5%
VTH
+ 1.5%
VTH+
VCC rising, Table 2
TA = -40°C to +125°C
VTH
- 2.5%
VTH
+ 2.5%
Reset Voltage
VTH-
VCC falling
0.98 x
VTH+
V
Reset Timeout Period
tRST
Figures 1, 2
86
135
250
µs
WATCHDOG
WDS1 = GND, WDS2 = GND
11
16
22
WDS1 = open, WDS2 = GND
22
32
44
WDS1 = VCC, WDS2 = GND
44
64
88
WDS1 = GND, WDS2 = open
88
128
177
WDS1 = open, WDS2 = open
177
256
354
WDS1 = VCC, WDS2 = open
354
512
708
WDS1 = GND, WDS2 = VCC
708
1024
1416
WDS1 = open, WDS2 = VCC
1416
2048
2832
ms
Watchdog Timeout Period
(Figure 2)
tWDG
WDS1 = WDS2 = VCC (watchdog disabled)
POWER FAIL
Power-Fail Select Threshold
VSEL
PFI input
0.65 x
VCC
0.85 x
VCC
V
VCC Monitoring Threshold
(Internal Threshold)
VITH
VCC rising
4.06
4.38
4.60
V
Internal Threshold Hysteresis
VIHYST
VCC falling
1.0
2
4.0
%VITH
PFI Monitoring Threshold
(External Threshold)
VETH
PFI rising
0.9
1.1
1.4
V
External Threshold Hysteresis
VEHYST
PFI falling
1.0
3.5
8.0
%VETH
Note 1: All parameters are tested at TA = +25°C. Specifications over temperature are guaranteed by design.
Note 2: Guaranteed by design. Not production tested.


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