ICL7673 Intersil Corporation, ICL7673 Datasheet
ICL7673
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ICL7673 Summary of contents
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... 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 ...
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... Operating Conditions Temperature Range: ICL7673C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. ...
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... INPUT VOLTAGE V FIGURE 1. ON-RESISTANCE SWITCH FUNCTION OF INPUT VOLTAGE 0.8 0.6 0.4 0 SUPPLY VOLTAGE (V) FIGURE 3. SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE 3 ICL7673 SYMBOL TEST CONDITIONS 0V 15V 0mA LPBAR P S LOAD +85° 15V 0V 0mA LSBAR ...
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... P FIGURE 5. I LEAKAGE CURRENT V S FUNCTION OF INPUT VOLTAGE Detailed Description As shown in the Functional Diagram, the ICL7673 includes a comparator which senses the input voltages V output of the comparator drives the first inverter and the open-drain N-Channel transistor P BAR drives a large P-Channel switch second inverter, and ...
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... V open drain output S Figure 12. For high power applications hysteresis can be applied as shown in Figure 13. 4 The ICL7673 can also be used as a clipping circuit as illustrated in Figure 14. With high impedance loads the circuit output will be nearly equal to the greater of the two input signals. 8 ...
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... FIGURE 13. HIGH CURRENT BACKUP SYSTEM WITH HYSTERESIS 6 ICL7673 R PNP 2 PNP (NOTE NOTE 4. > ICL7673 GND GND R PNP 2 PNP EXTERNAL EQUIPMENT W EXTERNAL EQUIPMENT FN3183 ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 7 ICL7673 V O ICL7673 V S GND V O FIGURE 14. CLIPPLING CIRCUITS ...