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LUCL9214GAU-DT Datasheet(PDF) 4 Page - Agere Systems |
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LUCL9214GAU-DT Datasheet(HTML) 4 Page - Agere Systems |
4 / 46 page Preliminary Data Sheet October 2001 Low-Cost Ringing SLIC L9214A/G 4 Agere Systems Inc. Features s Onboard balanced trapezoidal ringing generation, 40 Vrms, 1.2 crest factor: — 3 REN ring load (2330 Ω + 24 µF), 600 Ω loop — 2 REN ring load (3500 Ω + 16 µF), 1000 Ω loop — 2 REN ring load (3500 Ω + 1.8 µF), 500 Ω loop — No ring relay — No bulk ring generator required — 15 Hz to 70 Hz ring frequency supported s Power supplies requirements: — VCC talk battery and ringing battery required — No –5 V supply required — No high-voltage positive supply required s Flexible Vcc options: — 3.3 V or 5 V VCC operation — 3.3 V or 5 V VCC interchangeable and transparent to users s Power control options: — Automatic battery switch — Power control resistor s Minimal external components required s Ten operating states: — Forward active, fast polarity reversal — Reverse active, fast polarity reversal — Forward active, slow polarity reversal — Reverse active, slow polarity reversal — Scan — Disconnect — Ringing, line forward with high slope — Ringing, line reverse with high slope — Ringing, line forward with low slope — Ringing, line reverse with low slope s Unlatched parallel data control interface s Low SLIC power: — Scan 24 mW (VCC = 5.0 V) — Forward/reverse active 148 mW (VCC = 5.0 V) — Scan 17 mW (VCC = 3.3 V) — Forward/reverse on-hook 135 mW (VCC = 3.3 V) s Supervision: — Loop start, fixed threshold with hysteresis — Ring trip filtering, fixed threshold not a function of battery voltage, user adjustable with an external resistor — Common-mode current for ground key applica- tions, user-adjustable threshold s Adjustable current limit: — 10 mA to 45 mA programming range at 5 V Vcc — 10 mA to 35 mA programming range at 3.3 V Vcc s Overhead voltage: — Automatically adjusted in active mode — Clamped <56.5 V in scan and on-hook modes s Thermal shutdown protection with hysteresis s Longitudinal balance: — ETSI/ITU-T balance — GR-909 s Meter pulse compatible s ac interface: — Two SLIC gain options to minimize external com- ponents required for interface to first- or third-gen- eration codecs — Sufficient dynamic range for direct coupling to codec output s 28-pin SOG, 32-pin PLCC, and 48-pin MLCC pack- age options s 90 V CBIC-S technology Description The L9214 is designed to provide battery feed, ringing, and supervision functions on short and medium plain old telephone service (POTS) loops. Supported round- trip loop length is up to 1000 Ω of wiring resistance plus handset or ringing load. This device is designed to min- imize power in all operating states. The L9214 offers eight operating states. The device assumes use of a lower-voltage talk battery, a higher- voltage ringing battery and a single VCC supply. The L9214 requires only a positive VCC supply. No –5 V supply is needed. The L9214 can operate with a VCC of either 5.0 V or 3.3 V, allowing for greater user flexibility. The choice of VCC voltage is transparent to the user; the device will function with either supply volt- age connected. Two batteries may be used: 1. A high-voltage ring battery (VBAT1). VBAT1 is a maxi- mum –70 V and is used for power ringing, scan, and on-hook transmission modes. This supply is current limited to the maximum power ringing current of approximately 90 mApeak. 2. A lower-voltage talk battery (VBAT2). VBAT2 is nor- mally used for active mode powering. Alternatively, operation may be from a single high-volt- age battery supply with a power control resistor to reduce the power dissipation in the SLIC. |
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