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ATTL7583AAJ-D Datasheet(PDF) 2 Page - Agere Systems |
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ATTL7583AAJ-D Datasheet(HTML) 2 Page - Agere Systems |
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2 / 20 page  2 2 Lucent Technologies Inc. Data Sheet February 2001 L7583A/B/C/D Line Card Access Switch Description (continued) The L7583Bxx and L7583Dxx versions provide only an integrated diode bridge along with current limiting and thermal shutdown (see Figure 2 for version B). This will cause positive faults to be directed to ground and neg- ative faults to battery. In either polarity, faults are reduced by the current-limit and/or thermal shutdown mechanisms. To protect the L7583 from an overvoltage fault condi- tion, use of a secondary protector is required. The sec- ondary protector must limit the voltage seen at the tip/ ring terminals to prevent the breakdown voltage of the switches from being exceeded. To minimize stress on the solid-state contacts, use of a foldback- or crowbar- type secondary protector is recommended. With proper choice of secondary protection, a line card using the L7583 will meet all relevant ITU-T, LSSGR, FCC, or UL* protection requirements. The L7583 operates off of a 5 V supply only. This gives the device extremely low idle and active power dissipa- tion and allows use with virtually any range of battery voltage. This makes the L7583 especially appropriate for remote power applications such as DAML or FOC/ FITL or other Bellcore TA 909 applications where power dissipation is particularly critical. A battery voltage is also used by the L7583, only as a reference for the integrated protection circuit. The L7583 will enter an all OFF state upon loss of battery. During power ringing, to turn on and maintain the ON state, the ring access switch and ring test switch will draw a nominal 2 mA or 4 mA from the ring generator. The L7583A/B/C/D device is packaged in a 24-pin, plastic DIP (L7583AF/BF/CF/DF) and in a 28-pin, plastic SOG (L7583AAJ/BAJ/CAJ/DAJ). * UL is a registered trademark of Underwriters Laboratories, Inc. Pin Information 12-2364.a (F) Note: Shown with A/C version protection. The 24-pin DIP is avail- able with either A/C or B/D version protection. Figure 1. 24-Pin, Plastic DIP (600 mil) 12-2365.d (F) Note: Shown with B/D version protection. The 28-pin SOG is avail- able with either A/C or B/D version protection. Figure 2. 28-Pin, Plastic SOG 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 VBAT RBAT RLINE NC FGND NC NC TLINE VDD SW1 8 9 10 LATCH RRINGING TTESTout SW2 SW3 SW4 SW5 SW7 SW9 SW8 SW10 SW6 TTESTin TBAT TRINGING NC INTESTin RTESTout RTESTin NC 11 12 INRING DGND TSD INTESTout CONTROL LOGIC SCR AND TRIP CKT 28 27 26 25 24 23 22 20 19 18 17 21 16 15 1 2 3 4 5 6 7 8 VBAT RBAT RLINE NC FGND NC NC TLINE VDD SW1 9 10 11 12 LATCH RRINGING NC SW2 SW3 SW4 SW5 SW7 SW9 SW8 SW10 SW6 TTESTin TBAT TRINGING TTESTout INTESTin RTESTout RTESTin NC 13 14 INRING DGND TSD INTESTout NC NC NC NC CONTROL LOGIC |
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