adm809-5l Analog Devices, Inc., adm809-5l Datasheet

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adm809-5l

Manufacturer Part Number
adm809-5l
Description
Microprocessor Supervisory Circuit
Manufacturer
Analog Devices, Inc.
Datasheet

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adm809-5lART
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GENERAL DESCRIPTION
The ADM809-5S/L supervisory circuits monitor the power
supply voltage in microprocessor systems. It provides a reset
output during power-up, power-down and brownout conditions.
On power-up, an internal timer holds reset asserted for 55 ms.
This holds the microprocessor in a reset state until conditions
have stabilized. The RESET output remains operational with
V
reset signal (RESET).
The reset comparator features built-in glitch immunity,
making it immune to fast transients on V
The ADM809-5S/L consumes only 17 µA, making it suitable
for low power portable equipment.
CC
as low as 1 V. The ADM809-5S/L provides an active low
RESET
CC
.
V
CC
V
CC
FUNCTIONAL BLOCK DIAGRAM
V
ADM809-5S/L
REF
ADM809-5S/L
GND
V
CC
Supervisory Circuit
RESET
GND
GENERATOR
Microprocessor
ADM809-5S/L
RESET
55ms
RESET
INPUT
SYSTEM
GND
V
CC
P
RESET

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adm809-5l Summary of contents

Page 1

... On power-up, an internal timer holds reset asserted for 55 ms. This holds the microprocessor in a reset state until conditions have stabilized. The RESET output remains operational with V as low The ADM809-5S/L provides an active low CC reset signal (RESET). The reset comparator features built-in glitch immunity, making it immune to fast transients on V The ADM809-5S/L consumes only 17 µ ...

Page 2

... –100 mV –40°C to +150° min 1.2 mA, ADM809-5S TH SINK = V min 3.2 mA, ADM809-5L TH SINK >1 µ 0°C to +150°C SINK A >1 µ –40°C to +150°C SINK A > V max 500 µA ...

Page 3

... ADM809-5SCHIPS 2. RESET t1 = RESET TIME = 55ms TYP. is below the CC V REF rises CC Model ADM809-5LART ADM809-5SART ORDERING GUIDE Temperature Range –40°C to +150°C –40°C to +150°C –40°C to +150°C –40°C to +150°C –40°C to +150°C ADM809-5S/L ...

Page 4

... ADM809-5S/L –Typical Performance Characteristics –40 – TEMPERATURE – C 180 – 160 V = 10mV OD 140 120 100 V = 20mV 100mV 200mV OD 0 –40 – TEMPERATURE – ...

Page 5

... INTERFACING TO OTHER DEVICES OUTPUT The ADM809-5S/L is designed to integrate with as many devices as possible and therefore has an output dependant on V Because of this design approach, interfacing this device to other devices is simplified. ENSURING A VALID RESET OUTPUT DOWN TO V falls below 0.8 V, ADM809-5S/L’s RESET no longer When V CC sinks current ...

Page 6

... ADM809-5S/L 0.0550 (1.397) 0.0470 (1.194) 0.0236 (0.599) 0.0177 (0.450) 0.0040 (0.102) 0.0005 (0.013) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). Surface Mount Package RT-3 0.1200 (3.048) 0.1102 (2.799) 3 0.1040 (2.642) 0.0827 (2.101 PIN 1 0.0413 (1.049) 0.0374 (0.950) 0.0807 (2.050) 0.0701 (1.781) 0.0440 (1.118) ...

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