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LUCL9313AP-DT Datasheet(PDF) 10 Page - Agere Systems |
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LUCL9313AP-DT Datasheet(HTML) 10 Page - Agere Systems |
10 / 40 page Data Sheet September 2001 Full-Feature SLIC and Ringing Relay for TR-57 Applications L9313 Line Interface and Line Access Circuit 10 Agere Systems Inc. Pin Information (continued) Table 1. Pin Descriptions (continued) Operating States Input State Coding Data control is via a parallel latched data control scheme. Data latches are edge-level sensitive. Data is latched in when the LATCH control input goes low. Data must be set up 200 ns before LATCH goes low and held 50 ns after LATCH goes high. While LATCH is low, the user should not change the data control inputs at B0, B1, and B2. The data control inputs at B0, B1, and B2 may only be changed when LATCH is high. NSTAT supervision output is not controlled by the LATCH control input. Table 2. Control States Pin Symbol Type Name/Function 35 ICM I Common-Mode Current Sense. To program tip or ring ground sense threshold, connect a resistor to ground and connect a capacitor to AGND to filter 50 Hz/60 Hz. If unused, the pin is connected to ground. 36 VTX O Tip/Ring Voltage Output. This output is a voltage that is directly proportional to the differ- ential tip/ring current. A resistor from this node to ITR sets the device transimpedance. Gain shaping for termination impedance with a COMBO I codec is also achieved with a network from this node to ITR. 37 ITR I Transmit Gain. A current output which is proportional to the differential current flowing from tip to ring. Input to AX amplifier. Connect a resistor from this node to VITR to set transmit gain to 300 Ω. Gain shaping for termination impedance with a COMBO I codec is also achieved with a network from this node to VITR. 39 TXI I Transmit ac Input (Noninverting). Connect a 0.1 µF capacitor from this pin to VTX for dc blocking. 40 VITR O Transmit ac Output Voltage. The output is a voltage that is directly proportional to the dif- ferential ac tip/ring current. This output is connected via a proper interface network to the codec. 41 RCVP I Receive ac Signal Input (Noninverting). This high-impedance input controls the ac dif- ferential voltage on tip and ring. 42 RCVN I Receive ac Signal Input (Inverting). This high-impedance input controls the ac differen- tial voltage on tip and ring. 43 AGND G Analog Ground. Ground return for VCC current. 44 VCC P 5 V Analog Power Supply. 5 V supply for analog circuitry. B2 B1 B0 RESET State 0001 Scan 0011 Powerup, forward battery 0101 Powerup, reverse battery 0111 Unassigned 1001 Ring 1011 Tip amp 1101 Ring amp 1111 Disconnect, break before make X X X 0 Disconnect, break before make |
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