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LUCL8560AAU-DT Datasheet(PDF) 8 Page - Agere Systems |
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LUCL8560AAU-DT Datasheet(HTML) 8 Page - Agere Systems |
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8 / 46 page  Data Sheet April 2000 L8560 Low-Power SLIC with Ringing 8 Lucent Technologies Inc. Pin Information (continued) Table 2. Pin Descriptions (continued) 32-Pin 44-Pin Symbol Type Description — 24 NC — No Connection. May be used as a tie point. 26 25 B2 I State Control Input. B0, B1, B2, and BR determine the state of the SLIC. See Table 3. Pin B2 has a 40 k Ω pull-up. 27 26 B1 I State Control Input. B0, B1, B2, and BR determine the state of the SLIC. See Table 3. Pin B1 has a 40 k Ω pull-up. 28 27 B0 I State Control Input. B0, B1, B2, and BR determine the state of the SLIC. See Table 3. Pin B0 has a 40 k Ω pull-up. 29 28 BR I State Control Input. B0, B1, B2, and BR determine the state of the SLIC. See Table 3. Pin BR has a 40 k Ω pull-up. — 29 NC — No Connection. May be used as a tie point. — 30 NC-NTP — No Connection. May not be used as a tie point. — 31 NC — No Connection. May be used as a tie point. 30 32 TG — Transmit Gain. Connect a 4.32 k Ω resistor from this pin to VTX. 31 33 VTX O The voltage at this pin is directly proportional to the differential tip/ring current. 32 34 TXI — ac/dc Separation. Connect a 0.1 µF capacitor from this pin to VTX. 1 35 NSTAT O Loop Detector Output/Ring Trip Detector Output. This output is a wired- OR of the NLC/NRDET outputs. When low, this logic output indicates that an off-hook condition exists or that ringing has been tripped. 2 — VEE — –5 V Power Supply L8560C. 2 — NC — No Connection L8560A/D/F. May be used as a tie point. — 36 NC — No Connection. May be used as a tie point. 3 37 VITR O ac Output Voltage. This output is a voltage that is directly proportional to the differential ac tip/ring current. 4 38 RCVP I Receive ac Signal Input (Noninverting). This high-impedance input con- trols the ac differential voltage on tip and ring. 5 39 RCVN I Receive ac Signal Input (Inverting). This high-impedance input controls the ac differential voltage on tip and ring. — 40 NC — No Connection. May be used as a tie point. 6 41 FB2 — Polarity Reversal Slowdown. Connect a capacitor to ground. 7 42 FB1 — Polarity Reversal Slowdown. Connect a capacitor to ground. 8 43 LCTH I Loop Closure Threshold Input. Connect a resistor to DCOUT to set off- hook threshold. — 44 DCR I dc Resistance. Short to analog ground for dc feed resistance of 55 Ω. The dc feed resistance can be increased to a nominal 760 Ω by shorting DCR to DCOUT. Intermediate values can be set by a simple resistor divider from DCOUT to ground with the trip at DCR (44-pin PLCC only). |
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