Product Brief June 2000 L9215A/G Short-Loop Sine Wave Ringing SLIC Introduction The L9215 is a subscriber line interface circuit that is optimized for short-loop, power sensitive applications. This device provides the complete set of line interface functionality, including power ringing needed to interface to a subscriber loop. This device has the capability to operate with a VCC supply of 3.3 V or 5 V and is designed to minimize external components required at all device interfaces. Features Onboard ringing generation Three ringing input options -- Sinewave -- PWM -- Logic level squarewave Flexible VCC options -- 5 V or 3.3 V VCC -- No -5 V required Battery switch to minimize off-hook power 11 operating states -- Scan mode for minimal power dissipation -- Forward and reverse battery active -- On-hook transmission states -- Meter pulse states -- Ring mode -- Disconnect mode Ultralow on-hook power -- 27 mW scan mode -- 41 mW active mode Two SLIC gain options to minimal external components in codec interface Loop start, ring trip, and ground key detectors Software or hardware controllable current limit and overhead voltage Meter pulse compatible 32-pin PLCC package Applications Voice over Internet Protocol (VoIP) Cable Modems Terminal Adapters (TA) Wireless Local Loop (WLL) Telcordia Technologies* TA-909 Access Network Termination (NT) Key Systems Description This device is optimized to provide battery feed, ringing, and supervision on short-loop plain old telephone service (POTS) loops. Supported loop length is less than 250 of wire. This device provides power ring to the subscriber loop through amplification of a low-voltage input. It provides forward and reverse battery feed states, onhook transmission, a low-power scan state, meter pulse states, and a forward disconnect state. The device requires a VCC and battery to operate. VCC may be either a 5 V or a 3.3 V supply. The ringing signal is derived from the high-voltage battery. A battery switch is included to allow for use of a lowervoltage battery in the off-hook mode, thus minimizing short-loop off-hook power. Loop closure, ring trip, and ground key detectors are available. The loop closure detector has a fixed threshold with hysteresis. The ring trip detector requires a single-pole filter, thus minimizing external components required. This device supports meter pulse applications. Meter pulse is injected into a dedicated meter pulse input. Injection of meter pulse onto tip and ring is controlled by the device's logic input pin. Both the dc current limit and overhead voltage are programmable. Programming may be done by external resistors or an applied voltage source. If the voltage source is programmable, the current limit and overhead may be set via software control. The device is offered with two gain options. This allows for an optimized codec interface, with minimal external components regardless of whether a firstgeneration or a programmable third-generation codec is used. * Telcordia Technologies is a registered trademark of Bell Communications Research, Inc. L9215A/G Short-Loop Sine Wave Ringing SLIC Product Brief June 2000 Application VBAT1 DBAT1 0.1 F RRT 383 k FUSIBLE OR PTC 50 VBAT2 CBAT1 CBAT2 CCC 0.1 F 0.1 F 0.1 F VBAT1 CRT VBAT2 VCC BGND VBAT2 VCC AGND ITR RTFLT RGX 4640 VTX DCOUT CTX 0.1 F PR TXI CC1 0.1 F LUCENT L7591 50 VFXI VITR L9215G PT DX0 DR0 FUSIBLE OR PTC RCVP VFROP RCVN VFRON OVH CONTROL VOLTAGE DX1 DR1 VPROG T8536 FS VREF CF1 PCM HIGHWAY CF2 NSTAT BR B2 B1 B0 RINGIN PPMIN CF1 0.47 F CF2 0.1 F FROM/TO T8536 CONTROL LATCHES CRING 0.47 F CPPM 10 nF PPM 0.5 Vrms B2 SLIC4a B1 SLIC3a B0 SLIC2a BR SLIC1a NSTAT SLIC0a BCLK SYNC AND CLOCK DGND VDD VDD 12-3534.E MOD (F) For additional information, contact your Microelectronics Group Account Manager or the following: INTERNET: http://www.lucent.com/micro E-MAIL: docmaster@micro.lucent.com N. AMERICA: Microelectronics Group, Lucent Technologies 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 PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256 Tel. (65) 778 8833, FAX (65) 777 7495 CHINA: Microelectronics Group, Lucent Technologies (China) Co., Ltd., A-F2, 23/F, Zao Fong Universe Building, 1800 Zhong Shan Xi Road, Shanghai 200233 P. R. China Tel. (86) 21 6440 0468, ext. 325, FAX (86) 21 6440 0652 JAPAN: Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700 EUROPE: Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. (44) 7000 582 368, FAX (44) 1189 328 148 Technical Inquiries: GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Ascot), FRANCE: (33) 1 40 83 68 00 (Paris), SWEDEN: (46) 8 594 607 00 (Stockholm), FINLAND: (358) 9 4354 2800 (Helsinki), ITALY: (39) 02 6608131 (Milan), SPAIN: (34) 1 807 1441 (Madrid) Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. Copyright (c) 2000 Lucent Technologies Inc. All Rights Reserved June 2000 PB00-044ALC