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參數(shù)資料
| 型號： | MIC693MC |
| 廠商： | MICREL INC |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| 封裝： | SOP-16 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 126K |
| 代理商： | MIC693MC |
July 2000
1
MIC691/693
Micrel
MIC691/693
P Supervisory Circuit
Advance Information
General Description
The MIC691/693 mircoprocessor supervisory multifunction
circuit which monitors battery control functions and power
supplies in microprocessor based systems. The circuit func-
tions include a watchdog timer, microprocessor reset, backup
battery switchover, CMOS RAM write protection, and power
failure warning.
The power supply line is monitored with a comparator and an
internal voltage reference. /RESET will remain logic low with
V
CC as low as 1.4V and will remain low for 200ms after VCC
rises above the reset threshold voltage. Battery-backup
mode is activated when V
CC falls below both the reset
threshold and V
BATT. VCC is connected to VOUT through a low
impedance PMOS switch and is capable of currents up to
250mA.
The MIC691 has a 5V reset threshold, while the MIC693 has
a low threshold of 4.4V.
Typical Application
VCC
VOUT
RESET
PFO
WDI
PFI
VBATT
+5V (Regulated)
Auxiliary
Power
DC Voltage
(Unregulated)
NMI
I/O Line
P
CMOS RAM
RESET
VCC
Features
Power OK/Resettime delay, 200ms
Watchdog timer, 100ms, 1.6s or Adj.
4.65V or 4.40V Precision Voltage Monitor
Available in 8-pin surface mount (SO)
V
OUT capable of sourcing up to 250mA
Available in16-pin surface mount (SO)
<1
A Standby current
Early power fail warning or low battery detect
Applications
Automotive systems
Intelligent systems
Critical microprocessor power monitoring
Battery powered computers
Controllers
Ordering Information
Part Number
Junction Temp. Range*
Package
MIC691NC
0
°C to +70°C
16-Lead PDIP
MIC691MC
0
°C to +70°C
16-Lead SOP
MIC693NC
0
°C to +70°C
16-Lead PDIP
MIC693MC
0
°C to +70°C
16-Lead SOP
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
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