LUCL8576BP-D AGERE [Agere Systems], LUCL8576BP-D Datasheet
LUCL8576BP-D
Related parts for LUCL8576BP-D
LUCL8576BP-D Summary of contents
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L8576B Dual Ringing SLIC Features Two SLIC channels for multiple tip/ring interfaces On-chip balanced ringing generator, no ring relay required Single battery operation or optional automatic bat- tery switch Quiet battery reversal for on-hook signaling Disconnect state Distortion-free, on-hook transmission ...
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L8576B Dual Ringing SLIC Contents Features ......................................................................1 Applications .................................................................1 Description...................................................................1 Pin Information ............................................................5 Functional Description .................................................7 General .....................................................................7 Protection..................................................................7 Tip/Ring Drivers ........................................................7 Battery Operation......................................................7 Transmit and Receive Interface ................................7 Data Interface ...........................................................8 Loop Current Detector ..............................................8 Operating States..........................................................8 Absolute Maximum ...
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May 2001 Description (continued) CONDITIONING PT PR RPWR CURRENT-LIMIT I PROG Agere Systems Inc. POWER CONDITIONING & REFERENCE STATE CONTROL – OUT CIRCUIT LOOP CLOSURE DETECTOR Figure 1. Architectural Diagram L8576B Dual Ringing SLIC ...
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L8576B Dual Ringing SLIC Description (continued) V BAT R DCT* C VCC 300 k 0 0.22 F, 100 V F1a 10% POLYESTER 0.22 F, 100 V F2a ...
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May 2001 Pin Information NSTATb NDISCb RPWRb PTb PRb VITRb TG2b TG1b RTFLTb RTTHb DC b OUT Table 1. Pin Descriptions Pin, Pin, Circuit Circuit Symbol Type — BAT 44 2 CF2 — 43 ...
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L8576B Dual Ringing SLIC Pin Information (continued) Table 1. Pin Descriptions (continued) Pin, Pin, Circuit Circuit Symbol Type RNGNG NSTAT NDISC RPWR — 36 ...
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May 2001 Functional Description Refer to the architectural and application diagrams (Figures 1 and 2, respectively). General The L8576B is a dual subscriber line interface circuit with each half of the device providing battery feed, supervision, and balanced ringing. It ...
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L8576B Dual Ringing SLIC Functional Description (continued) Transmit and Receive Interface A second gain setting is provided to accommodate ring trip. A switch is built into TG2. In ringing mode, TG1 and TG2 are internally connected, thus shorting out the ...
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May 2001 Operating States (continued) These states are selected using three logic inputs, B2, RNGNG, and NDISC. B2 sets normal operation, either with forward or reverse battery. RNGNG overrides B2 and applies ringing with the polarity of tip and ring ...
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L8576B Dual Ringing SLIC Electrical Characteristics Generally, minimum and maximum values are testing requirements. However, some parameters may not be tested in production because they are guaranteed by design and device characterization. Typical values reflect the design center or nominal ...
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May 2001 Electrical Characteristics Pretrip will not occur for the circuits shown below, per GR-909, 4.5.9. TIP TIP Table 5. Battery Feed Parameter 1 Loop Resistance Range (3.17 dBm overload into 600 ): ...
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L8576B Dual Ringing SLIC Electrical Characteristics Table 6. Analog Signal Pins Parameter Differential PT/PR Current Sense (DC Gain (PT/ OUT Forward Battery ( GX1 Reverse Battery ( ...
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May 2001 Electrical Characteristics Table 7. ac Feed Characteristics (continued) Parameter Gain vs. Level (transmit and receive; 0 dBV reference) – Return Loss : 200 Hz—500 Hz 500 Hz—3400 Hz 3 Transhybrid Loss : 200 ...
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L8576B Dual Ringing SLIC Test Configurations R LOOP 600 R TTH 52 0.056 F 0 BAT 100 DISCONNECT BYPASS CAPACITOR 4 BAT BASIC TEST CIRCUIT ...
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May 2001 Test Configurations (continued) 100 F TIP 365 V M 365 – RING 100 F LONGITUDINAL BALANCE = 20log Figure 8. Longitudinal Balance I LONG – BASIC TEST CIRCUIT – ...
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L8576B Dual Ringing SLIC Applications (continued) Characteristic Curves (continued –65 V BAT –48 V BAT LOOP VOLTAGE (V) Note ...
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May 2001 Applications (continued) dc Design Battery Feed The dc feed characteristic can be described by – ------------------------------------------- - – --------------------------------- ...
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L8576B Dual Ringing SLIC Applications (continued) dc Design (continued) Off-Hook Detection The loop closure comparator has built-in longitudinal rejection, eliminating the need for an external 60 Hz fil- ter. The loop closure detection threshold is internally set at 12 mA. ...
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May 2001 Applications (continued) Power Ringing (continued) Power Ringing Load Telcordia GR-909 specifies that a minimum 40 Vrms must be delivered REN ringing load of 1386 40 F. For 5 REN load recommended that V ...
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L8576B Dual Ringing SLIC Applications (continued) ac Design (continued) Example 1, Real Termination The following design equations refer to the circuit in Figure 20. Use these to synthesize real termination impedance. Termination impedance: V T/R --------- - ...
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May 2001 Applications (continued) ac Design (continued) Example 2, Complex Termination The gain shaping required of a complex termination impedance can be synthesized using the internal AX amplifier. The following discussion and equations present a method for selecting proper component ...
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L8576B Dual Ringing SLIC Applications (continued) ac Design (continued) R TGS R = 24.4 k TGP –I T/R 195 AX RCVN RCVP Figure 21. ac Interface Circuit Using First-Generation Codec (Blocking Capacitors Not Shown) Transmit Gain Transmit gain will be ...
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May 2001 Applications (continued) ac Design (continued) Receive Gain Ratios will set both the low-frequency RCV T1 GP termination and receive gain for the complex case. In the complex case, additional high-frequency compen- sation, ...
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L8576B Dual Ringing SLIC Applications (continued) ac Design (continued) Typically, values of 0 0.47 F capacitors are used for dc blocking. The addition of blocking capaci- tors will cause a shift in the return loss and hybrid bal- ...
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May 2001 Outline Diagram 44-Pin PLCC Dimensions are in millimeters. PIN #1 IDENTIFIER Agere Systems Inc. 17.65 MAX 16.66 MAX ZONE 0.51 MIN 1.27 TYP 0.53 MAX L8576B Dual Ringing SLIC 39 16.66 ...
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... L8576B Dual Ringing SLIC Ordering Information Device Part No. Description LUCL8576BP-D Dual SLIC LUCL8576BP-DT Dual SLIC For additional information, contact your Agere Systems Account Manager or the following: INTERNET: http://www.agere.com E-MAIL: docmaster@micro.lucent.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 PACIFIC: Agere Systems Singapore Pte ...