Am79Q02/021/031 AM79Q02 LITHO-7M-5/96-0 - Datasheet Archive

 

Quad Subscriber Line Audio-Processing Circuits Whether you are competing in multiple markets worldwide or developing multiple

 

PRODUCT BRIEF Quad Subscriber Line Audio-Processing Circuits Whether you are competing in multiple markets worldwide or developing multiple linecard applications within a single country, you need a codec/filter solution that gives you the flexibility to adapt one basic linecard design to address an array of application needs. AMD's cost-effective, software-programmable solution is the Am79Q02/021/031 Am79Q02/021/031 QSLAC TM line of quad subscriber line audioprocessing circuits. Based on AMD's industry-standard SLAC TM and DSLAC TM circuit designs, the four-channel QSLAC codec/filters handle the analog-to-digital and digital-to-analog conversion, filtering, compression, and expansion functions required to interface a telephone's analog voice signals to the digital PCM highway. Advanced Process Technology and Architecture Manufactured in AMD's submicron CMOS process technology, the QSLAC devices offer linecard designers the high performance and low-power consumption needed to maximize linecard density at minimum cost. When combined with four AMD SLICs, each QSLAC device provides an economical, software-configurable solution to the BORSCHT functions for both long-loop and short-loop applications. One Basic Linecard Design for Multiple Markets The advanced QSLAC codec architecture implements four independent channels and provides the utmost in software programmability, enabling linecard manufacturers to create a single hardware design that satisfies the requirements of multiple markets, or multiple requirements within a single market. Using one programmable linecard design for multiple markets enables manufacturers to reduce development and inventory costs, streamline manufacturing, and speed time to market. User-Friendly Control Through Digital Filters The QSLAC's programmable DSP filters allow a linecard's analog characteristics to be easily adjusted through software to address virtually any set of line conditions. These digital filters provide outstanding reliability, no drift in filter response over time or temperature, and superior transmission performance. The Cost-Effective Choice for Multi-Channel Applications AMD's QSLAC devices are ideal for all telephony subscriber linecard applications that require high-density, multi-channel linecard designs. The cost of the QSLAC codec/filter's programmable DSP and surface-mount package can thus be amortized across four telephone lines resulting in higher per-channel density on the printed circuit board and lower overall system costs. Am79Q02/021/031 Am79Q02/021/031 Intelligent Control Interface QSLAC device configurations are available for both single- and dual-PCM highway connection. Several QSLAC devices can be linked on one bus interface to the backplane through a single buffer. An intelligent bus interface is not required because each QSLAC device has its own buffer control. QSLAC codec/filters also save processor or logic overhead by generating interrupts for switch hook detects on a per-channel basis, which eliminates the need for constant polling of line circuits. Packaging and Availability The QSLAC devices are available in three package configurations: 44-pin PLCC (with dualor single-PCM highway options), 32-pin PLCC, and 32-pin PDIP. For additional information on AMD's QSLAC devices, contact your local AMD sales representative. Quad SLAC Device Dual/Single PCM Highway Analog VIN1 VOUT1 Signal Processing Channel 1 (CH 1) VIN2 Signal Processing Channel 2 (CH 2) VOUT2 VIN3 DRA TSCA Time Slot Assigner (TSA) Signal Processing Channel 3 (CH 3) VIN4 DXA DXB Signal Processing Channel 4 (CH 4) VOUT3 DRB TSCB VOUT4 VREF SLIC CD11 CD21 C31 C41 C51 CD12 CD22 C32 C42 C52 CD13 CD23 C33 C43 C53 CD14 CD24 C34 C44 C54 CHCLK Clock & Reference Circuits FS PCLK MCLK/E1 SLIC Interface (SLI) RST Microprocessor Interface (MPI) INT CS DI/O DCLK Microprocessor Am79Q02/021/031 Am79Q02/021/031 QSLACTM Features and Benefits Benefits Features Performs the functions of four codec/filter devices Four-channel architecture Software programmable ·SLIC input impedance ·Transhybrid balance ·Transmit and receive gains ·Equalization (frequency response) ·Digital I/O pins ·Programmable debouncing ·Time slot assigner Integrates four independent channels in one chip Reduces real estate requirements for multi-channel linecards Enables single linecard design to meet multiple country requirements through software programmability Standard microprocessor interface Makes it easy to control interface A-law, µ-law, or linear coding Provides linear port for connection to external DSP engines (e.g., for voice messaging services) Provides robust PCM interface with built-in time slot assigner; no external switching matrix needed in small systems Single or dual-PCM ports available ·Up to 8.192 MHz each (128 channels per port) ·Optional supervision on PCM highway Built-in test modes with loopback, tone generation, and microprocessor access to PCM data Low-power CMOS technology with 5-V-only operation Mixed mode (analog and digital) impedance scaling Performance characteristics guaranteed over a 12-dB gain range Real-time data register with interrupt (open drain or TTL output) Supports multiplexed SLIC detectors Broadcast mode 256-kHz or 293-kHz chopper clock for AMD SLICs with switching regulator (AM79Q02 AM79Q02 only) AMD is a registered trademark and QSLAC is a trademark of Advanced Micro Devices, Inc. All other brand and product names are used for identification only and may be trademarks of their respective companies. APPLICATIONS HOTLINE & LITERATURE ORDERING USA: Tel. (408) 749-5703 JAPAN: Tel. 03-3346-7550 JAPAN: FAX 03-3346-9628 FAR EAST: FAX (852) 2956-0599 EUROPE & UK: Tel. 44-(0)1256-811 101 FAX 44-(0)1256-843 963 Makes it easy to test integrity of line circuit. No -5-V supply required Enables high degree input impedance adjustment Guarantees all parametric performance over the full gain range Relieves processor overhead by generating real time interrupts when SLIC detectors change state. Reduces processor or logic overhead Optionally allows same data to be written to two or four channels of a QSLAC device with one write cycle Saves external components by providing on-board chopper clock for SLICs with switched-mode regulators TOLL FREE: USA (800) 222-9323 FRANCE 0590-8621 GERMANY 0130-813875 ITALY 1678-77224 Internet Address: http://www.amd.com One AMD Place P.O. Box 3453 Sunnyvale, California 94088-3453 Tel.: (408) 732-2400 Toll Free: (800) 538-8450 TWX: 910-339-9280 TELEX: 34-6306 Printed in USA LITHO-7M-5/96-0 LITHO-7M-5/96-0 20044A