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FN8092.6
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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| Intersil (and design) is a trademark of Intersil Americas LLC.
Copyright Intersil Americas LLC. 2005, 2006, 2008, 2009, 2015. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL88705, ISL88706, ISL88707,
ISL88708, ISL88716, ISL88813
µP Supervisor with Watchdog Timer,
Power-Fail Comparator, Manual Reset and
Adjustable Power-On Reset
Designed with high reset threshold accuracy and low power
consumption, the ISL88705, ISL88706, ISL88707,
ISL88708, ISL88716 and ISL88813 devices are
microprocessor supervisors that are designed to monitor
power-supply and battery functions in microprocessor
systems. They can help to lower system cost, reduce board
space requirements and increase the reliability of systems.
These devices provide essential functions such as supply
voltage supervision by asserting a reset output during
power-up and power-down as well as during brownout
conditions. An auxiliary voltage monitor is provided for
detecting power failures warning the system of low battery
conditions or presence detection. In addition, an
independent watchdog timer helps to monitor
microprocessor activity every 1.6s (typical). An active-low
manual reset is offered and reset signals remain asserted
until V
DD
returns to proper operating levels.
Users can increase the nominal 200ms power-on reset
time-out delay by adding an external capacitor to the C
POR
pin on the ISL88707 and ISL88708.
Features
• Fixed-Voltage Options Allow Precise Monitoring of +3.0V,
+3.3V, and +5.0V Power Supplies
• Additional Voltage Monitor for Power-Fail Detection or
Low-Battery Warning
- Monitors Voltages Down to 1.25V
- Adjustable Power-Fail Input Threshold
• Watchdog Timer Capability With 1.6s Time-out
• Both RST and RST
Outputs Available
• 140ms Minimum Reset Pulse Width with Option to
Customize Using an External Capacitor
• Manual Reset Input on all Devices
• Reset Signal Valid Down to V
DD
= 1V
• Accurate ±1.8% Voltage Threshold
• Immune to Power-Supply Transients
• Ultra Low 10µA Maximum Supply Current at 3V
• Pb-Free (RoHS Compliant)
Applications
• Portable/Battery Powered Equipment
• Notebook/Desktop Computer Systems
• Designs Using DSPs, Microcontrollers or Microprocessors
• Controllers
• Intelligent Instruments
• Communications Systems
• Industrial Equipment
Pinouts
ISL88705, ISL88706
(8 LD SOIC)
(PDIP - NO LONGER AVAILABLE)
TOP VIEW
ISL88716, ISL88813
(8 LD SOIC)
(PDIP - NO LONGER AVAILABLE)
TOP VIEW
ISL88707, ISL88708
(8 LD SOIC)
(PDIP - NO LONGER AVAILABLE)
TOP VIEW
1
2
3
4
8
7
6
5
V
DD
GND
PFI
WDO
RST
WDI
PFO
MR
1
2
3
4
8
7
6
5
V
DD
GND
PFI
WDO
RST
WDI
PFO
MR
1
2
3
4
8
7
6
5
V
DD
GND
PFI
RST
RST
C
POR
PFO
MR
Data Sheet November 30, 2015
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