Maker : Intersil Corporation
Part No. : ICL7673

  Datasheet PDF : ICL7673.pdf
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Product Information

® ICL7673 Data Sheet July 22, 2005 FN3183.4 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. 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 • Pb-Free Plus Anneal Available (RoHS Compliant) Ordering Information PART NUMBER ICL7673CPA ICL7673CPAZ (See Note) ICL7673CBA ICL7673CBA-T ICL7673CBAZA (See Note) ICL7673CBAZA-T (See Note) TEMP. RANGE (°C) 0 to 70 0 to 70 0 to 70 PACKAGE 8 Ld PDIP 8 Ld PDIP* (Pb-free) 8 Ld SOIC (N) PKG. DWG. # E8.3 E8.3 M8.15 M8.15 M8.15 M8.15 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 8 Ld SOIC (N) Tape and Reel 0 to 70 0 to 70 8 Ld SOIC (N) (Pb-free) 8 Ld SOIC (N) (Pb-free) Functional Block Diagram VP P1 VO *Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. VS P2 SBAR + PBAR Pinouts ICL7673 (SOIC, PDIP) TOP VIEW VO VS SBAR GDN 1 2 3 4 8 7 6 5 VP NC PBAR NC GND VP > VS , P1 SWITCH ON AND PBAR SWITCH ON VS > VP , P2 SWITCH ON AND SBAR SWITCH ON 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 1999-2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ICL7673 Absolute Maximum Ratings Input Supply (VP or VS) Voltage . . . . . . . . . . . . GND - 0.3V to +18V Output Voltages PBAR and SBAR . . . . . . . . . . . GND - 0.3V to +18V Peak Current Input VP (at VP = 5V) (Note 1) . . . . . . . . . . . . . . . . . . . . . . . 38mA Input VS (at VS = 3V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA PBAR or SBAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mA Thermal Information Thermal Resistance (Typical, Note 2) θJA (°C/W) θJC (°C/W) PDIP Package* . . . . . . . . . . . . . . . . . . 150 N/A Plastic SOIC Package . . . . . . . . . . . . . 180 N/A Maximum Storage Temperature. . . . . . . . . . . . . . . . . -65°C to 150°C Maximum Lea...

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