PDF HC55171BIM Data sheet ( Hoja de datos )

Número de pieza	HC55171BIM
Descripción	Low Cost 5 REN Ringing SLIC for ISDN Modem/TA and WL
Fabricantes	Intersil Corporation
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No Preview Available ! Data Sheet HC55171B July 1998 File Number 4422.1 Low Cost 5 REN Ringing SLIC for ISDN Modem/TA and WL The HC55171B low cost, 5 REN ringing SLIC is designed to accommodate a wide variety of short loop applications and provides the same degree of ﬂexibility as the high performance HC55171. The ﬂexible features include open circuit tip to ring DC voltages, user deﬁned ringing waveforms, ring trip detection thresholds, and loop current limits that can be tailored for many applications. Additional features of the HC55171B are complex impedance matching, pulse metering, and transhybrid balance. The HC55171B is designed for use in short loop, low cost systems where traditional ring generation is not economically feasible. The device is manufactured in a high voltage Dielectric Isolation (DI) process. The DI process provides substrate latch up immunity, resulting in a robust system design. A thermal shutdown with an alarm output and line fault protection are also included for operation in harsh environments. Ordering Information PART NUMBER HC55171BIM HC55171BIB TEMP. RANGE (oC) PACKAGE -40 to 85 28 Ld PLCC -40 to 85 28 Ld SOIC PKG. NO. N28.45 M28.3 Block Diagram Features • Load Drive Capability . . . . . . . . . . . . . . . . . . . . . . . 5 REN • Trapezoidal, Square or Sine Wave Capability • Ringing from -80V Battery . . . . . . . . . . . . . . . . . . . 75VP-P • Ringing from -75V Battery . . . . . . . . . . . . . . . . . . . 70VP-P • Ringing Current Independent of Loop Current Setting • Ringing Crest Factor Independent of REN Loading • Latchup Immune to Inductive Kick Back and Hot Plug • Fax, Answering Machine and MTU Compatible • Resistive and Complex Impedance Matching • Programmable Loop Current Limit • Switch Hook, Ring Trip and Ground Key Detection • Single Low Voltage +5V Supply Applications • Solid State Line Interface Circuit for Hybrid Fiber Coax, Set Top Box, Voice/Data Modems • Related Literature - AN9607, Impedance Matching Design Equations - AN9628, AC Voltage Gain - AN9636, Implementing an Analog Port for ISDN - AN549, The HC-5502/4X Telephone SLIC TIP FEED TIP SENSE RING FEED RING SENSE 1 RING SENSE 2 VREF RTI VBAT VCC AGND BGND 2-WIRE INTERFACE LOOP CURRENT DETECTOR FAULT DETECTOR BIAS CURRENT LIMIT RING TRIP DETECTOR IIL LOGIC INTERFACE F1 F0 RS TST 4-WIRE INTERFACE +- RELAY DRIVER RDI VRX VTX VRING - IN 1 OUT 1 SHD ALM ILIMIT RTD RDO 63 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 \| Copyright © Intersil Corporation 1999 1 page HC55171B R TF 25 TF +- TIP 14 SENSE R R R R 4.5K R R R/2 R/20 2R VRX 17 OUT 1 12 +2V -IN 1 13 VRING 24 +- OP AMP +- TA 2R SHD 15 RING SENSE 1 16 RING SENSE 2 100K 100K 100K 100K 4.5K 25K RA +- 25K 90K 90K RTD FAULT DET 26 RF RF +- 90K VB/2 REF GM +- R = 108kΩ 3 VREF 18 NU 28 RTI VTX 19 VCC AGND 2 BIAS NETWORK 1 22 BGND 27 VBAT THERM LTD SH TSD 4 F1 5 F0 6 RS 9 TST GK RF2 11 ILIMIT RFC 20 RDI 7 SHD 8 RTD 10 ALM 21 RDO HC55171B DEVICE TRUTH TABLE F1 F0 STATE 0 0 Loop power Denial Active 0 1 Power Down Latch RESET, Power on RESET 1 0 RD Active (unbalanced ringing) 1 1 Normal Loop feed The truth table for the internal logic of the HC55171B is provided in the above table. This family of ringing SLICs can be configured to support traditional unbalanced ringing and through SLIC balanced ringing. The device operating states used by through SLIC ringing applications are loop power denial and normal feed. During loop power denial, the tip and ring amplifiers are disabled (high impedance) and the DC volt- age of each amplifier approaches ground. The SLIC will not provide current to the subscriber loop during this mode and will not detect loop closure. Voice transmission occurs during the normal loop feed mode. During normal loop feed the SLIC is completely operational and performs all transmission and supervisory functions. Power Dissipation Careful thermal design is required to guarantee that the maximum junction temperature of 150oC of the device is not exceeded. The junction temperature of the SLIC can be calculated using: TJ = TA + θJA(ICC VCC + IBAT VBAT – ((ILOOP)2 • RLOOP)) (EQ. 1) Where TA is maximum ambient temperature and θJA is junction to air thermal resistance (and is package dependent). The entire term in parentheses yields the SLIC power dissipation. The power dissipation of the subscriber loop does not contribute to device junction temperature and is subtracted from the power dissipation term. Operating at 85oC, the maximum PLCC SLIC power dissipation is 1.18W. Likewise, the maximum SOIC SLIC power dissipation is 0.92W. 67 5 Page HC55171B HC5517B Trapezoidal Ringing Application Circuit Parts List COMPONENT U1 - Ringing SLIC RS1, RS2 RZO, RIL1 RRT1 RRT2 RRT3 RRF VALUE HC55171B 49.9Ω 56.2kΩ 49.9kΩ 1.5MΩ 51.1kΩ 45.3kΩ TOLERANCE N/A 1% 1% 1% 1% 1% 1% RATING N/A 1/2W 1/8W 1/8W 1/8W 1/8W 1/8W COMPONENT VALUE RIL2 RTRAP CPS1, CPS2 CIL, CRT, CAC, CRX CTRAP DRT, DTRAP 7.68kΩ User-Defined 0.1µF 0.47µF 4.7µF 1N914 TOLERANCE 1% 1% 10% RATING 1/8W 1/8W 100V 10% 50V 10% 10V Generic Rectifier Diode All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certiﬁcation. Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with- out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see web site http://www.intersil.com Sales Ofﬁce Headquarters NORTH AMERICA Intersil Corporation P. O. Box 883, Mail Stop 53-204 Melbourne, FL 32902 TEL: (407) 724-7000 FAX: (407) 724-7240 EUROPE Intersil SA Mercure Center 100, Rue de la Fusee 1130 Brussels, Belgium TEL: (32) 2.724.2111 FAX: (32) 2.724.22.05 ASIA Intersil (Taiwan) Ltd. 7F-6, No. 101 Fu Hsing North Road Taipei, Taiwan Republic of China TEL: (886) 2 2716 9310 FAX: (886) 2 2715 3029 73 11 Page

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Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
HC55171BIB	Low Cost 5 REN Ringing SLIC for ISDN Modem/TA and WL	Intersil Corporation
HC55171BIM	Low Cost 5 REN Ringing SLIC for ISDN Modem/TA and WL	Intersil Corporation

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