ISL88705 데이터 시트보기 (PDF) - Renesas Electronics

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ISL88705

µP Supervisor with Watchdog Timer, Power-Fail Comparator, Manual Reset and Adjustable Power-On Reset

Renesas Electronics 

DATASHEET

ISL88705, ISL88706, ISL88707, ISL88708, ISL88716,

ISL88813

FN8092

Rev 6.00

November 30, 2015

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 VDD returns to proper operating levels.

Users can increase the nominal 200ms power-on reset

time-out delay by adding an external capacitor to the CPOR

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 VDD = 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

MR 1

VDD 2

GND 3

PFI 4

8 WDO

7 RST

6 WDI

5 PFO

ISL88716, ISL88813

(8 LD SOIC)

(PDIP - NO LONGER AVAILABLE)

TOP VIEW

MR 1

VDD 2

GND 3

PFI 4

8 WDO

7 RST

6 WDI

5 PFO

ISL88707, ISL88708

(8 LD SOIC)

(PDIP - NO LONGER AVAILABLE)

TOP VIEW

MR 1

VDD 2

GND 3

PFI 4

8 RST

7 RST

6 CPOR

5 PFO

FN8092 Rev 6.00

November 30, 2015

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