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PDF SP730EK-4.375 Data sheet ( Hoja de datos )
| Número de pieza | SP730EK-4.375 | |
| Descripción | Microprocessor Supervisory Circuit with Pull Up Resistor | |
| Fabricantes | Sipex | |
| Logotipo |  |
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® SP730
Microprocessor Supervisory
Circuit with Pull Up Resistor
FEATURES
■ Holds Microcontroller in Reset
■ Reset Microcontroller during power loss
■ 4.375 Voltage Trip Point
■ Active Low RESET Pin
■ Internal Pull-up Resistor
■ Holds RESET for 350ms (typical)
■
RESET valid down to V 1.0V
DD
■ 45µA Typical Operating Current
■ Offered in a 3 Pin SOT-23 Package
APPLICATIONS
■ Portable Electronic Devices
■ Electrical Power Meter
■ Computer System Board
■ Modem
GND
SP730
3 Pin SOT-23
RESET
VDD
Now Available in Lead Free Packaging
DESCRIPTION
The SP730 is a voltage supervisory device designed to keep a microcontroller in reset until the
system voltage has reached the proper level and stabilized. It also operates as protection from
brown-out conditions when the supply voltage drops below a safe operating level. The SP730
has an internal 5k pull-up resistor. The device has an active low RESET pin and will assert the
RESET signal whenever the voltage on the VDD pin is below the trip-point voltage. The part is
available in a small 3 pin SOT-23 package. Contact factory for other trip voltage options.
TYPICAL APPLICATION CIRCUIT
SP730
VDD
GND
RESET
VDD
Microcontroller
VDD
Bypass
Capacitor
MCLR
or
RESET
GND
Date: 6/14/04
SP730 Microprocessor Supervisory Circuit
1
© Copyright 2004 Sipex Corporation
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
1.0020
1.0000
0.9980
0.9960
0.9940
0.9920
0.9900
-40
-20
Normalized VTRIP vs Temperature
0 20 40 60
Temperature ('C)
80 100
VOL vs IOL
1200
1100
1000
900
800
700
600
500
400
300
200
Temp = 25'C
100
0
0
1
2 3.2 4
5
6
7 8.5 9
10 11 12 13 14 15 16 17 18 19 20
IOL (mA)
Vdd=4.25V
Vdd=3.5V
Vdd=2.5V
Date: 6/14/04
SP730 Microprocessor Supervisory Circuit
5
© Copyright 2004 Sipex Corporation
5 Page | ||
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| PDF Descargar | [ Datasheet SP730EK-4.375.PDF ] | |
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