Datasheet > AS1904_1

AS1904_1

更新时间： 2024-09-25 06:37:43

品牌	Logo	应用领域
艾迈斯 - AMSCO		监控
页数	文件大小	规格书
9页	179K
描述
Ultra Low-Power uP Supervisory Circuit

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AS1904_1 数据手册

Data Sheet

AS1904, AS1905, AS1906

Ultra Low-Power µP Supervisory Circuit

1 General Description

The AS1904/5/6 family is an ultra low-power supervisory

circuit device.

2 Key Features

Low 150nA (typical) Supply Current

Precision Monitoring of 2.5-, 3-, and 3.3V-Power

Supplies

The device can be used to monitor the supply voltage of

digital systems and microprocessors and initiate a reset

when the voltage goes below a predefined threshold.

The duration of the reset is 5/20/100/500ms (typ.) after

the supply voltage has risen above the threshold.

Supply Voltage Range 1.0 to 3.6V

Reset Threshold Available from 2.2 to 3.1V

Available in three Versions

The device exhibits excellent reliability and can reduce

application costs by eliminating all external components.

- AS1904 Push-Pull RESETN

- AS1905 Push-Pull RESET

The device is available with different output drivers:

- AS1906 Open Drain RESETN

4 Time-Out Periods Ranging from 5 to 500ms

The AS1904 has a push-pull driver with an active low

reset.

Detection Voltage Accuracy: ±1.5%

The AS1905 uses the same output stage as the

AS1904, but has an active high reset.

Temperature Range: -40 to +85°C

SOT23-3 Package

The AS1906 has an open drain output with active low

reset.

Superior Upgrade to austriamicrosystems

AS1901/2/3 Device Family

All devices operate down to a voltage of 1V.

The reset thresholds are factory-trimmable between

2.2V and 3.08V in steps of approximately 100mV.

Each device of the AS1904/5/6 family is offered with four

time-out periods of 5/20/100/500ms.

3 Applications

The devices are ideal for computers, intelligent instru-

ments, controllers, critical microprocessor and micro-

controller, power monitoring and portable/battery-

powered equipment.

The extremely low current consumption of only 150nA

(typ) at 3.3V makes the device ideal for use in portable

applications.

All devices are available in a 3-pin SOT23 package.

Figure 1. Functional Block Diagrams

VCC

VDD

VCC

VDD

VCC

AS1904

AS1905

AS1906

Microprocessor

RESET,

RESETN

RESET

GND

RESETN

RESET I/O

GND

www.austriamicrosystems.com

Revision 1.41

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