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CPC7583BB Datasheet(PDF) 8 Page - Clare, Inc. |
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CPC7583BB Datasheet(HTML) 8 Page - Clare, Inc. |
8 / 16 page www.clare.com 8 Rev. E CPC7583 Table 12. Truth Table for the CPC7583BA and CPC7583BB INring INtestin INtestout TSD TESTin Break RingTest Ring TESTout Switches Switches Switches Switches Switches 0V 0V 0V 5V/Float1 Off On Off Off Off3 0V 0V 5V 5V/Float1 Off Off Off Off On4 0V 5V 0V 5V/Float1 On Off Off Off Off5 5V 0V 0V 5V/Float1 Off Off Off On Off6 5V 5V 0V 5V/Float1 Off Off On Off Off7 0V 5V 5V 5V/Float1 On Off Off Off On8 5V 0V 5V 5V/Float1 Off Off Off Off Off9 5V 5V 5V 5V/Float1 Off Off Off Off Off9 Don’t Don’t Don’t 0V2 Off Off Off Off Off9 Care Care Care 1 If TSD = 5V, the thermal shutdown mechanism is disabled. If TSD if floating, the thermal shutdown mechanism is active. 2 Forcing TSD to ground overrides the logic input pins and forces an all off state. 3 Idle/Talk State. 4 TESTout state. 5 TESTin state. 6 Power Ringing State. 7 Ringing generator test state. 8 Simultaneous TESTout and TESTin state. 9 All OFF State A parallel in/parallel out data latch is integrated into the CPC7583. Operation of the data latch is controlled by the logic level input pin LATCH. The data input to the latch is the INPUT pin of the CPC7583 and the output of the data latch is an internal node used for state control. When the LATCH control pin is at logic 0, the data latch is transparent and data control signals flow directly from INPUT, through the data latch to state control. Any changes in INPUT will be reflected in the state of the switches. When the LATCH control pin is at logic 1, the data latch is active; the CPC7583 will no longer react to changes at the INPUT control pin. The state of the switches is now latched; that is, the state of the switches will remain as they were when the LATCH input transitioned from logic 0 to logic 1. The switches will not respond to changes in INPUT as long as LATCH is held high. Note that the Tsd input is not tied to the data latch. Tsd is not affected by the LATCH input. Tsd input will override state control via INPUT and LATCH. |
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