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參數(shù)資料
| 型號(hào)： | ICL7673ITV |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Automatic Battery Back-Up Switch |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, MBCY8 |
| 封裝： | METAL CAN-8 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大小： | 144K |
| 代理商： | ICL7673ITV |
3-81
TM
FN3183.2
ICL7673
Automatic Battery Back-Up Switch
The Intersil ICL7673 is a monolithic CMOS battery backup
circuit that offers unique performance advantages over
conventional means of switching to a backup supply. The
ICL7673 is intended as a low-cost solution for the switching
of systems between two power supplies; main and battery
backup. The main application is keep-alive-battery power
switching for use in volatile CMOS RAM memory systems
and real time clocks. In many applications this circuit will
represent a low insertion voltage loss between the supplies
and load. This circuit features low current consumption, wide
operating voltage range, and exceptionally low leakage
between inputs. Logic outputs are provided that can be used
to indicate which supply is connected and can also be used
to increase the power switching capability of the circuit by
driving external PNP transistors.
Pinouts
ICL7673 (SOIC, PDIP)
TOP VIEW
ICL7673 (CAN)
TOP VIEW
V
P
Features
Automatically Connects Output to the Greater of Either
Input Supply Voltage
If Main Power to External Equipment is Lost, Circuit Will
Automatically Connect Battery Backup
Reconnects Main Power When Restored
Logic Indicator Signaling Status of Main Power
Low Impedance Connection Switches
Low Internal Power Consumption
Wide Supply Range: . . . . . . . . . . . . . . . . . . . 2.5V to 15V
Low Leakage Between Inputs
External Transistors May Be Added if Very Large
Currents Need to Be Switched
Applications
On Board Battery Backup for Real-Time Clocks,
Timers, or Volatile RAMs
Over/Under Voltage Detector
Peak Voltage Detector
Other Uses:
- Portable Instruments, Portable Telephones, Line
Operated Equipment
Functional Block Diagram
Ordering Information
PART
NUMBER
TEMP. RANGE
(
o
C)
PACKAGE
PKG. NO.
ICL7673CPA
0
to 70
8 Ld PDIP8
E8.3
ICL7673CBA
0
to 70
8 Ld SOIC (N)
M8.15
ICL7673ITV
25 to 85
8 Ld Metal Can T8.C
V
O
V
S
S
BAR
GDN
1
2
3
4
8
7
6
5
V
P
NC
P
BAR
NC
PBAR
V
S
V
O
SBAR
NC
NC
2
4
6
1
3
7
5
8
GND
P1
P2
V
S
GND
P
BAR
S
BAR
V
O
+
-
V
P
V
P
> V
S
, P1 SWITCH ON AND P
BAR
SWITCH ON
V
S
> V
P
, P2 SWITCH ON AND S
BAR
SWITCH ON
Data Sheet
April 1999
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2002. All Rights Reserved
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