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PDF SP802M Data sheet ( Hoja de datos )
| Número de pieza | SP802M | |
| Descripción | Low Power Microprocessor Supervisory with Battery Switch-Over | |
| Fabricantes | Sipex | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP802M (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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® SP690A/692A/802L/
802M/805L/805M
Low Power Microprocessor Supervisory
with Battery Switch-Over
s Precision Voltage Monitor:
SP690A/SP802L/SP805L at 4.65V
SP692A/SP802M/SP805M at 4.40V
s Reset Time Delay - 200ms
s Watchdog Timer - 1.6 sec timeout
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
MAX690A/692A/802L/802M/805L
DESCRIPTION
The SP690A/692A/802L/802M/805L/805M are a family of 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 SP690A/692A/802L/802M/805L/805M include a watchdog timer, a µP
reset and backup-battery switchover, and power-failure warning, a complete µP monitoring
and watchdog solution. The series is ideal for applications in automotive systems, computers,
controllers, and intelligent instruments. All designs where it is critical to monitor the power
supply to the µP and it’s related digital components will find the series to be an ideal solution.
PART NUMBER
SP690A
SP692A
SP802L
SP802M
SP805L
SP805M
RESET
Threshold
4.65 V
4.40 V
4.65 V
4.40 V
4.65 V
4.40 V
RESET
Accuracy
125mV
125mV
75mV
75mV
125mV
125mV
RESET Active
LOW
LOW
LOW
LOW
HIGH
HIGH
PFI Accuracy
4%
4%
2%
2%
4%
4%
SP690A/692ADS/08
SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over
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 SP690A
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
SP690A/692ADS/08
SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over
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
RESET Logic high (SP805 only)
WDI Watchdog timer is disabled
Figure 14. 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 charging
circuit as a backup source (see Figure 16).
PART
NUMBER
MAXIMUM
BACKUP-BATTERY
VOLTAGE [V]
SP690A
SP802L
SP805L
SP692A
SP802M
SP805M
4.80
4.55
Figure 15. Allowable BACKUP-BATTERY Voltages
+5V
VBATT
VCC
VOUT
CONNECT TO
STATIC RAM
0.1F
RESET CONNECT
(RESET)* TO µP
GND *( ) SP805L only
Figure 16. Backup Power Source Using High Capacity
Capacitor with SP690A/802L/805L 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 SP690A/SP802L/SP805L 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
SP690A/SP802L/SP805L then switches to
battery-backup mode.
+5V
VBATT
0.1F
100KΩ
VCC
VOUT
CONNECT TO
STATIC RAM
RESET CONNECT
(RESET)* TO µP
GND
*( ) SP805M only
Figure 17. Backup Power Source Using High Capacity
Capacitor with SP692A/802M/805M and a +5V ±10% Supply
SP690A/692ADS/08
SP690A/692A Low Power Microprocessor Supervisory with Battery Switch-Over
11
© Copyright 2000 Sipex Corporation
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SP802M.PDF ] | |
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