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PDF AS1904 Data sheet ( Hoja de datos )
| Número de pieza | AS1904 | |
| Descripción | Ultra Low-Power uP Supervisory Circuit | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS1904 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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AS1904, AS1905, AS1906
Ultra Low-Power µP Superviso
1 General Description
The AS1904/5/6 family is an ultra low-power supervisory
ry
2
!
Circuit
Key Features
Low 150nA (typical) Supply
CurreCntoWnosrPuldmo'wsDpetaLirotoanwS!ehset
e
t
circuit device.
! Precision Monitoring of 2.5-, 3-, and 3.3V-Power
The device can be used to monitor the supply voltage of
Supplies
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
The device exhibits excellent reliability and can reduce
application costs by eliminating all external components.
The device is available with different output drivers:
! 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%
AS1904, but has an active high reset.
! Temperature Range: -40 to +85°C
! The AS1906 has an open drain output with active low
reset.
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
2.2V and 3.08V in steps of approximately 100mV.
3 ApplicationsEach device of the AS1904/5/6 family is offered with four
time-out periods of 5/20/100/500ms.
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.
The devices are ideal for computers, intelligent instru-
ments, controllers, critical microprocessor and micro-
controller, power monitoring and portable/battery-
powered equipment.
Figure 1. Functional Block Diagrams
VCC
3
VDD
VCC
AS1904
AS1905
RESET, 2
RESETN
GND
1
Microprocessor
RESET
GND
VCC
3
VDD
AS1906
2
RESETN
GND
1
VCC
Microprocessor
RESET I/O
GND
www.austriamicrosystems.com
Revision 1.41
1-9
1 page  
AS1904, AS1905, AS1906
Data Sheet - Typical Operating Characteristics
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7 Typical Operating Characteristics
Figure 3. Supply Current vs. Temperature
0.5
0.4
0.3
0.2
0.1
0
-40 -15 10 35 60
Tem perature(°C)
85
Figure 4. Power Down Reset Delay vs. Temp.
200
VOD = 10mV
175
150
125
100
75
50
25
0
-40 -15 10 35 60
Tem perature(°C)
85
Figure 5. Power-Up Reset Timeout vs. Temperature
200
175
150
125
100
75
50
25
0
-40
-15 10 35 60
Tem perature(°C)
85
Overdrive
Figure 6. Max. Trans. Duration vs. Reset Th.
300
275
250
225
200
175
150
125
100
75
50
25
0
1 10 100 1000
Reset Th. Overdrive VTH-VCC (mV)
www.austriamicrosystems.com
Revision 1.41
5-9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AS1904.PDF ] | |
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