ISL88813

Manufacturer Part NumberISL88813
Description(ISL88705 - ISL88813) uP Supervisor
ManufacturerIntersil Corporation
ISL88813 datasheet
 


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Data Sheet
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
returns to proper operating levels.
DD
Users can increase the nominal 200ms power-on reset time-
out delay by adding an external capacitor to the C
the ISL88707 and ISL88708.
Pinouts
ISL88705, ISL88706
(8 LD PDIP/SOIC)
TOP VIEW
MR
1
8
WDO
V
RST
2
7
DD
WDI
GND
3
6
PFI
PFO
4
5
1
ISL88705, ISL88706, ISL88707,
ISL88708, ISL88716, ISL88813
December 6, 2006
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
• Accurate ±1.8% Voltage Threshold
• Immune to Power-Supply Transients
• Ultra Low 10µA Maximum Supply Current at 3V
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
pin on
POR
• Portable/Battery Powered Equipment
• Notebook/Desktop Computer Systems
• Designs Using DSPs, Microcontrollers or Microprocessors
• Controllers
• Intelligent Instruments
• Communications Systems
• Industrial Equipment
ISL88716, ISL88813
(8 LD PDIP/SOIC)
TOP VIEW
MR
WDO
1
8
V
2
7
RST
DD
3
6
WDI
GND
4
5
PFI
PFO
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
|
1-888-INTERSIL or 1-888-468-3774
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
FN8092.3
= 1V
DD
ISL88707, ISL88708
(8 LD PDIP/SOIC)
TOP VIEW
MR
RST
1
8
V
RST
2
7
DD
3
6
C
GND
POR
4
5
PFI
PFO

ISL88813 Summary of contents

  • Page 1

    ... 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 ...

  • Page 2

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 Ordering Information PART NUMBER PART (Notes 1, 2) MARKING ISL88705IP846Z 88705 I46Z ISL88706IP844Z 88706 I44Z ISL88706IP831Z 88706 I31Z ISL88706IP829Z 88706 I29Z ISL88706IP826Z 88706 I26Z ISL88813IP846Z 88813 I46Z ISL88716IP826Z 88716 I26Z ISL88707IP846Z 88707 I46Z ISL88708IP844Z 88708 I44Z ...

  • Page 3

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 Functional Block Diagrams V DD POR ± V REF MR PB WDT WDI PFI PF ± V REF GND ISL88705, ISL88706 RST POR ± V REF MR PB WDO WDT WDI PFI PFO PF ± V REF ISL88716, ISL88813 V DD RST POR V ± ...

  • Page 4

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 Pin Descriptions ISL88705, ISL88716, ISL88707, ISL88706 ISL88813 ISL88708 NAME GND PFI PFO 6 C POR 6 6 WDI 7 7 RST 7 8 RST 8 8 WDO Watchdog Output. This output is pulled low when the nominal 1.6s internal Watchdog Timer expires 4 Manual Reset Input ...

  • Page 5

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 Absolute Maximum Ratings Temperature Under Bias . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Voltage on any Pin with Respect to GND . . . . . . . . . . . -1.0V to +7V DC Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA Lead Temperature (Soldering, 10s +300°C Recommended Operating Conditions Temperature Range (Industrial .-40°C to +85°C CAUTION: Absolute Maximum Ratings indicate limits beyond which permanent damage to the device and impaired reliability may occur ...

  • Page 6

    ... PFOH NOTE: 4. Applies to ISL88705, ISL88706, ISL88716, and ISL88813. Principles of Operation The ISL88705 - ISL88813 devices provide those functions needed for monitoring critical voltages such as power-supply and battery functions in microprocessor systems. Features of these supervisors include Power On Reset control, Supply Voltage Supervision, Power-Fail Detection and Manual Reset Assertion ...

  • Page 7

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 Low Voltage Monitoring These devices monitor both the voltage level of V auxiliary voltage on PFI. When IC is initially biased reset is asserted until the V voltage is greater than the specific IC fixed-voltage trip point for the t duration of 200ms. At any subsequent time that ...

  • Page 8

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 Manual Reset The manual-reset input (MR) allows the user to trigger a reset by using a push-button switch. The MR input is an active low debounced input. By connecting a push-button directly from MR to ground, the designer adds manual system reset capability (see Figure 4). Reset is asserted if the MR pin is pulled low to less than 100mV for the minimum MR pulse width or longer while the push-button is closed ...

  • Page 9

    ... The middle position has the ISL88813IB846Z installed and is set window detector with jumper J1 installed. The V monitors for UV and the PFI for OV via the R3 divider ...

  • Page 10

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 generation capability via the C pin with an external POR capacitor to GND. This evaluation platform has an adjustable SMD capacitor, C4 (8pF to 45pF) that allows easy evaluation of this feature. Also unique to the ISL88707 and ISL88708 are both the RESET and RESET outputs, all other variants having only one or the other ...

  • Page 11

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 FIGURE 15. ISL88075EVAL1 Bipolar Voltage Sensing Any of the ISL88705 - ISL88813 devices can be used to sense and report the presence of both a positive and negative voltage via the PFI and PFO as shown in Figure 16. The V monitors the positive voltage as normal and the DD PFI monitors the presence of the negative supply ...

  • Page 12

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 FIGURE 17. ISL88705EVAL1 SCHEMATIC (TOP BANK) 12 FN8092.3 December 6, 2006 ...

  • Page 13

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 Plastic Dual-In-Line Packages (PDIP) D SEATING PLANE MDP0031 PLASTIC DUAL-IN-LINE PACKAGE SYMBOL PDIP8 PDIP14 A 0.210 0.210 A1 0.015 0.015 A2 0.130 0.130 b 0.018 0.018 b2 0.060 0.060 c 0.010 0.010 D 0.375 0.750 E 0.310 0.310 E1 0.250 0.250 e 0.100 ...

  • Page 14

    ... ISL88705, ISL88706, ISL88707, ISL88708, 8SL88716, ISL88813 Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. ...