product brief june 2000 L7581/2/3 and l8581 ringing, tip/ring, and line card access switches features n small size/surface-mount packaging n monolithic ic reliability n low impulse noise n make-before-break, break-before-make operation n clean, bounce-free switching n low, matched on resistance n built-in current limiting, thermal shutdown, and slic protection n 5 v only operation, very low power consumption n battery monitor, all off state upon loss of battery n no emi n latched logic level inputs, no drive circuitry n only one external protector required applications n central office n dlc n pbx n daml n hfc/fitl description the L7581/8581 provides solid-state access for power ringing applications. the l7582 provides access for power ringing and line test. the l7583 line card access switch (lcas) provides power ring- ing, line test, and self-test access. incorporated into the l758xa is a diode bridge/scr clamping circuit, current-limiting circuitry, and thermal shutdown mechanism. the l758xb provides a diode bridge clamping circuit, current-limiting circuitry, and thermal shutdown mechanism. a single external protection device is required. agere systems inc. has available characterized protection devices designed to work with agere lcas devices (contact a agere account representative for informa- tion about these products). agere lcas devices require a 5 v supply to operate. additionally, a battery monitor circuit is included, which forces an all-off state if the battery is lost. the L7581 device is packaged in a 16-pin, plastic dip package (L7581ac/bc) and a 16-pin, plastic sog package (L7581aae/bae). these devices are pin compatible with the l7541 device. the l7582 device is packaged in a 16-pin, plastic dip package (l7582ac/bc) and a 16-pin, plastic sog package (l7582aae/bae). the l7582aae/bae are pin compatible with the l7542aae/bae. the l7583a/b/c/d device is packaged in a 24-pin, plastic dip (l7583af/bf/cf/df) and a 28-pin, plastic sog package (l7583aaj/baj/caj/daj).
product brief june 2000 ringing, tip/ring, and line card access switches L7581/2/3 and l8581 agere systems inc. reserves the right to make changes to the product(s) or information contained herein without notice. no liab ility is assumed as a result of their use or application. copyright ? 2002 agere systems inc. all rights reserved june 2000 pb00-074alc (replaces pn98-107alc, pn98-108alc, and pn99-008alc) for additional information, contact your agere systems account manager or the following: internet: http://www.agere.com e-mail: docmaster@agere.com n. america: agere systems inc., 555 union boulevard, room 30l-15p-ba, allentown, pa 18109-3286 1-800-372-2447 , fax 610-712-4106 (in canada: 1-800-553-2448 , fax 610-712-4106) asia: agere systems hong kong ltd., suites 3201 & 3210-12, 32/f, tower 2, the gateway, harbour city, kowloon tel. (852) 3129-2000 , fax (852) 3129-2020 china: (86) 21-5047-1212 (shanghai), (86) 10-6522-5566 (beijing), (86) 755-695-7224 (shenzhen) japan: (81) 3-5421-1600 (tokyo), korea: (82) 2-767-1850 (seoul), singapore: (65) 6778-8833 , taiwan: (886) 2-2725-5858 (taipei) europe: tel. (44) 7000 624624 , fax (44) 1344 488 045 application 12-2366d f crowbar protection r1 r2 tip ring sw9 sw8 sw3 break break sw4 ring tip battery feed ring generator battery scr and trip ckt v bat (reference) ringing sw1 sw7 test out ringing return test return sw5 test in sw10 test out ringing access ringing test sw6 sw2 test in
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