AS1906 查看數據表（PDF） - austriamicrosystems AG

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AS1906

Ultra Low-Power µP Supervisory Circuit

austriamicrosystems AG 

Data Sheet

A S 1 9 0 4 , A S 1 9 0 5 , A S 1 9 0 6 Ul

1 General Description 2 Key Features The

tra Low-P

AS1904/5/6 family

ower

is an ultra

µP Supervi

low-power supervisory

s

o

r

y

!

Circu

Low 150nA

it

(typical)

Supply

CurreCntoWnosrPuldmo'wspetLiroonw!est

circuit device.

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

The device can be used to monitor the supply voltage of

Supplies

lid 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

! Supply Voltage Range 1.0 to 3.6V

! Reset Threshold Available from 2.2 to 3.1V

the supply voltage has risen above the threshold.

! Available in three Versions

a The device exhibits excellent reliability and can reduce

application costs by eliminating all external components.

v The device is available with different output drivers:

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

reset.

! The AS1905 uses the same output stage as the

- AS1904 Push-Pull RESETN

- AS1905 Push-Pull RESET

- AS1906 Open Drain RESETN

! 4 Time-Out Periods Ranging from 5 to 500ms

! Detection Voltage Accuracy: ±1.5%

t AS1904, but has an active high reset.

! Temperature Range: -40 to +85°C

G s ! The AS1906 has an open drain output with active low

reset.

A t All devices operate down to a voltage of 1V.

The reset thresholds are factory-trimmable between

! SOT23-3 Package

! Superior Upgrade to austriamicrosystems

AS1901/2/3 Device Family

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

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

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

m t The extremely low current consumption of only 150nA

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

a n applications.

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

The devices are ideal for computers, intelligent instru-

ments, controllers, critical microprocessor and micro-

controller, power monitoring and portable/battery-

powered equipment.

al c Figure 1. Functional Block Diagrams

nic VCC

3

VDD

VCC

chAS1904

AS1905

e RESET, 2

T RESETN

Microprocessor

RESET

VCC

3

VDD

AS1906

2

RESETN

VCC

Microprocessor

RESET I/O

GND

1

GND

GND

1

GND

www.austriamicrosystems.com

Revision 1.41

1-9

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