|
|
PDF SP703EP Data sheet ( Hoja de datos )
| Número de pieza | SP703EP | |
| Descripción | Low Power Microprocessor Supervisory with Battery Switch-Over | |
| Fabricantes | Sipex | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de SP703EP (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
® SP703/SP704
Low Power Microprocessor Supervisory
with Battery Switch-Over
s Precision Voltage Monitor:
SP703 at 4.65V
SP704 at 4.40V
s Reset Time Delay - 200ms
s Debounced TTL/CMOS -
Compatible Manual - Reset Input
s Minimum component count
s 60µA Maximum Operating Supply Current
s 0.6µA Maximum Battery Backup Current
s 0.1µA Maximum Battery Standby Current
s Power Switching
250mA Output in VCC Mode (0.6Ω)
25mA Output in Battery Mode (5Ω)
s Voltage Monitor for Power Fail or
Low Battery Warning
s Available in 8 pin SO and DIP packages
s RESET asserted down to VCC = 1V
s Pin Compatible Upgrades to
MAX703/MAX704
DESCRIPTION
The SP703/704 devices are microprocessor (µP) supervisory circuits that integrate a myriad
of components involved in discrete solutions to monitor power-supply and battery-control
functions in µP and digital systems. The series will significantly improve system reliability and
operational efficiency when compared to discrete solutions. The features of the SP703/704
devices include a manual reset input, a µP reset and backup-battery switchover, and power-
failure warning. The series is ideal for applications in computers, controllers, intelligent
instruments and automotive systems. All designs where it is critical to monitor the power
supply to the µP and its related digital components will find the series to be an ideal solution.
VOUT 1
VCC 2
GND 3
PFI 4
8 VBATT
7 RESET
6 MR
5 PFO
VBATT BATTERY SWITCHOVER
CIRCUITRY
VOUT
VCC
RESET
RESET
GENERATOR
1.25V
MR
PFI
1.25V
PFO
PINOUT
SP703/704DS/07
INTERNAL BLOCK DIAGRAM
SP703/704 Low Power Microprocessor Supervisory
1
© Copyright 2000 Sipex Corporation
1 page  
TYPICAL CHARACTERISTICS (25oC, unless otherwise noted)
VCC Supply Current vs.
Temperature (Normal Mode)
51 VCC=5V
47 VBATT=2.8V
43
39
35
31
27
23
19
-60 -30 0 30 60 90 120 150
Temperature Deg. C
Battery Supply Current vs.
Temperature (Backup Mode)
2.9
2.4
VCC=0V
VBATT=2.8V
1.9
1.4
0.9
0.4
-0.1
-60 -40 -20 0 20 40 60 80 100 120 140
Temperature Deg. C
PFI Threshold
vs. Temperature
1.256
1.254
V =5V
CC
V =0
BATT
NO LOAD ON PFO
1.252
1.250
1.248
1.246
-60 -30 0 30 60 90 120 150
Temperature Deg. C
VBATT to VOUT ON
Resistance vs. Temperature
15
VCC=0V
VBATT=2V
10 VBATT=2.8V
VCC to VOUT On
Resistance vs. Temperature
0.9
0.8
VCC=5V
VBATT=0V
0.7
0.6
5
VBATT=4.5V
0.5
0.4
0 0.3
-60 -30 0 30 60 90 120 150
-60 -30 0 30 60 90 120 150
Temperature Deg. C
Temperature Deg. C
Reset Output Resistance
vs. Temperature
600 V =5V,V =2.8V
CC BATT
500 Soucing Current
400
300
200
100
0
-60
VCC=0V,VBATT=2.8V
Sink Current
-30 0 30 60 90 120 150
Temperature Deg. C
Reset Delay
vs. Temperature
212
VCC=0V to 5V Step,
210 VBATT=2.8V
208
206
204
202
200
-60 -30 0 30 60 90 120 150
Temperature Deg. C
Reset Threshold
vs. Temperature
4.70
4.69 SP703
4.68
VBATT=0V
Power Down
4.67
4.66
4.65
4.64
4.63
4.62
4.61
4.60
-60 -30 0 30 60 90 120 150
Temperature Deg. C
Battery Current vs. VCC Voltage
IE+2
IE+1
IE+0
V =2.8V
BATT
IE-1
IE-2
IE-3
IE-4
IE-5
IE-6
IE-7
IE-8
.0000
VCC (0.5V/div)
5.000
SP703/704DS/07
SP703/704 Low Power Microprocessor Supervisory
5
© Copyright 2000 Sipex Corporation
5 Page 
SIGNAL
STATUS
VCC
VOUT
Disconnected from VOUT
Connected to VBATT through
an internal 8Ω PMOS switch
VBATT
PFI
Connected to VOUT. Current
drawn from the battery is
less than 0.6µA, as long as
VCC < VBATT - 1V.
Power-fail comparator is
disabled.
PFO Logic low
RESET Logic low
MR Manual Reset is disabled
Figure 10. Input and Output Status in Battery-Backup Mode.
To enter the Battery-Backup mode, VCC must be less than the
Reset threshold and less than VBATT.
Using a High Capacity Capacitor
as a Backup Power Source
VBATT has the same operating voltage range as
VCC, and the battery-switchover threshold volt-
ages are typically +20mV centered at VBATT,
allowing use of a capacitor and a simple charg-
ing circuit as a backup source (see Figure 12).
PART
NUMBER
MAXIMUM
BACKUP-BATTERY
VOLTAGE [V]
SP703
4.80
SP704
4.55
Figure 11. Allowable BACKUP-BATTERY Voltages
+5V
VCC
VBATT SP703
VOUT
CONNECT TO
STATIC RAM
0.1F
RESET
GND
CONNECT
TO µP
Figure 12. Backup Power Source Using High Capacity
Capacitor with SP703 and a +5V ±5% Supply
If VCC is above the reset threshold and VBATT
is 0.5V above VCC, current flows to VOUT and
VCC from VBATT until the voltage at VBATT is
less than 0.5V above VCC.
Leakage current through the capacitor charging
diode and the SP703/704 internal power
diode eventually discharges the capacitor to
VCC. Also, if VCC and VBATT start from 0.5V
above the reset threshold and power is lost
at VCC, the capacitor on VBATT discharges
through VCC until VBATT reaches the reset
threshold; the SP703/704 then switches to
battery-backup mode.
+5V
VCC
VBATT SP704
VOUT
CONNECT TO
STATIC RAM
0.1F
100KΩ
RESET
GND
CONNECT
TO µP
Figure 13. Backup Power Source Using High Capacity
Capacitor with SP704 and a +5V ±10% Supply
SP703/704DS/07
SP703/704 Low Power Microprocessor Supervisory
11
© Copyright 2000 Sipex Corporation
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SP703EP.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| SP703EN | Low Power Microprocessor Supervisory with Battery Switch-Over | Sipex |
| SP703EP | Low Power Microprocessor Supervisory with Battery Switch-Over | Sipex |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |