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ICL7673CPA Datasheet(PDF) 1 Page - Intersil Corporation |
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ICL7673CPA Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 7 page 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 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 (oC) 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 VO VS SBAR GDN 1 2 3 4 8 7 6 5 VP NC PBAR NC VP PBAR VS VO SBAR NC NC 2 4 6 1 3 7 5 8 GND P1 P2 VS GND PBAR SBAR VO + - VP VP > VS, P1 SWITCH ON AND PBAR SWITCH ON VS > VP, P2 SWITCH ON AND SBAR 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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