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ISL88706IP826Z Datasheet(PDF) 9 Page - Intersil Corporation

Part # ISL88706IP826Z
Description  uP Supervisor with Watchdog Timer, Power-Fail Comparator, Manual Reset and Adjustable Power-On Reset
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL88706IP826Z Datasheet(HTML) 9 Page - Intersil Corporation

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9
FN8092.3
December 6, 2006
Parametric Performance
ISL88705EVAL1 and Applications
The ISL88705EVAL1 supports all six of the ISL88705-
ISL88813 devices, enabling evaluation of basic functional
operation and common application implementations.
Figures 15 and 17 illustrate the ISL88705EVAL1 in
photographic and schematic forms respectively.
The ISL88705EVAL1 is divided into two banks; each bank
having one each of the three available pinouts. The top bank
is fully populated and immediately usable whereas the
bottom bank is unpopulated. Samples of other sample
variants can be evaluated singularly or in combination with
any other variant to provide a specific voltage monitoring
solution. The left position has a ISL88705IB846Z monitoring
the VDD rail voltage for a minimum of 4.64V with reset
signaling. In addition, the power fail input (PFI) is being
compared to the internal PFI voltage reference of 1.25V and
the power fail output (PFO) will report the PFI condition. This
feature can be used for monitoring an auxiliary voltage,
providing an early warning of a brownout or power failure or
presence detection in a system.
The middle position has the ISL88813IB846Z installed and is
set up as a 5V window detector with jumper J1 installed. The
VDD monitors for UV and the PFI for OV via the R3, R4
divider. The PFO output is inverted and connected to the
manual reset input (MR) via U4. Hence a reset signal is
generated when 4.64V < VDD > 5.38V. With J1 removed the
PFO will be an OV indicator but no reset signal will be
generated. Both of these positions share a common
Watchdog input (WDI) signal although each has its own
Watchdog output (WDO).
The right position has the ISL88707IB846Z and is set up as
a +12V and +5V UV monitor with reset signal. The PFI
allows monitoring of any voltage above the 1.25V PFI
reference and with a resistor divider this is used to monitor
the 12V. The ISL88707 and ISL88708 have the unique
feature of an adjustable time to reset (tPOR)signal
FIGURE 6. IDD vs TEMPERATURE
FIGURE 7. VTH1 vs TEMPERATURE FOR 5V SUPPLY
FIGURE 8. VTH1 vs TEMPERATURE < 5V SUPPLY
6.00
6.50
7.00
7.50
8.00
8.50
9.00
9.50
10.0
10.5
-40 -30 -20 -10
0
10 20 30 4050607090
TEMPERATURE (°C)
11.0
VDD = 3.3V
VDD = 5V
4.20
4.25
4.30
4.36
4.40
4.45
4.50
4.55
4.60
4.65
-40 -30 -20 -10
0
10 20 30 4050607090
TEMPERATURE (°C)
4.70
VTH = 4.64V
VTH = 4.38V
-40 -30 -20 -10
0
1020304050607090
TEMPERATURE (°C)
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
VTH = 2.92V
VTH = 3.09V
VTH = 2.63V
FIGURE 9. VTHPFI vs TEMPERATURE
TEMPERATURE (°C)
1.2530
1.2525
1.2520
1.2515
1.2510
1.2505
1.2500
-40 -30 -20 -10
0
1020 304050607090
ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813


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