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CPC7691BA Datasheet(PDF) 9 Page - Clare, Inc. |
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CPC7691BA Datasheet(HTML) 9 Page - Clare, Inc. |
9 / 17 page CPC7691 R00E PRELIMINARY 9 1.9 Protection Circuitry Electrical Specifications 1.10 Truth Table Parameter Conditions Symbol Minimum Typical Maximum Unit Protection Diode Bridge Forward Voltage drop, continuous current (50/60 Hz) Apply ± dc current limit of break switches VF -2.1 3.0 V Forward Voltage drop, surge current Apply ± dynamic current limit of break switches VF -5- Protection SCR (CPC7691xB) Surge current - - - - * A Trigger current: Current into VBAT pin. SCR activates, +25 ° C ITRIG - 65 -mA SCR activates, +85 ° C45 Hold current: Current through protection SCR SCR remains active, +25 ° C IHOLD - 195 -mA SCR remains active, +85 ° C 110 130 Gate trigger voltage IGATE = ITRIGGER § VTBAT or VRBAT VBAT -4 - VBAT -2 V Reverse leakage current VBAT = -48 V IVBAT -0.2 1.0 μA On-state voltage 0.5 A, t = 0.5 μsV TBAT or VRBAT - -3 -V 2.0 A, t = 0.5 μs-5 Temperature Shutdown Specifications Shutdown activation temperature Not production tested - limits are guaranteed by design and Quality Control sampling audits. TTSD_on 110 125 150 °C Shutdown circuit hysteresis TTSD_off 10 - 25 °C *Passes GR1089 and ITU-T K.20 with appropriate secondary protection in place. §V BAT must be capable of sourcing ITRIGGER for the internal SCR to activate. State INRINGING Latch TSD Break Switches Ringing Switches Talk 0 0 Z 1 On Off Ringing 1 Off On Latched X 1 Unchanged All-Off X X 0 Off Off 1 Z = High Impedance. Because T SD has an internal pull up at this pin, it should be controlled with an open-collector or open-drain type device. |
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