Microchip's cost-effective, software-programmabl
e solution is the Le58QL02/021/031 QLSLAC and the Le58QL061/063 QLSLAC line of DSP-based voice codec/filters. The four-channel QLSLAC devices 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 or General Circuit Interface (GCI).
Additional Features
Low-power, 3.3 V CMOS technology with 5 V tolerant digital inputs
Pin programmable PCM/MPI or GCI interface
Software and coefficient compatible to the Le79Q061/ 063 QSLAC device
Standard PCM/microprocessor interface (PCM/MPI mode)
Single or Dual PCM ports available
Time slot assigner (up to 128 channels per port)
Clock slot and transmit clock edge options
Optional supervision on the PCM highway
1.536, 1.544, 2.048, 3.072, 3.088, 4.096, 6.144, 6.176, or 8.192 MHz master clock derived from MCLK or PCLK
µP access to PCM data
Real Time Data with interrupt (open drain or TTL)
Broadcast mode
General Circuit Interface (GCI mode)
Control and PCM data on a single port
2.048 Mbits/s data rate
2.048 MHz or 4.096 MHz clock option
Performs the functions of four codec/filters
Software programmable
SLIC device input impedance and Transhybrid balance
Transmit and receive gains and Equalization
Programmable Digital I/O pins with debouncing
A-law, µ-law, or linear coding
Built-in test modes with loopback, tone generation, and µP access to PCM data
Mixed state (analog and digital) impedance scaling
Performance guaranteed over a 12 dB gain range
Supports multiplexed SLIC device outputs
256 kHz or 293 kHz chopper clock for SLIC devices with switching regulator
Maximum channel bandwidth for V.90 modems
Microchip's cost-effective, software-programmable solution is the Le58QL02/021/031 QLSLAC and the Le58QL061/063 QLSLAC line of DSP-based voice codec/filters. The four-channel QLSLAC devices 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 or General Circuit Interface (GCI).
Additional Features
- Low-power, 3.3 V CMOS technology with 5 V tolerant digital inputs
- Pin programmable PCM/MPI or GCI interface
- Software and coefficient compatible to the Le79Q061/ 063 QSLAC device
- Standard PCM/microprocessor interface (PCM/MPI mode)
- Single or Dual PCM ports available
- Time slot assigner (up to 128 channels per port)
- Clock slot and transmit clock edge options
- Optional supervision on the PCM highway
- 1.536, 1.544, 2.048, 3.072, 3.088, 4.096, 6.144, 6.176, or 8.192 MHz master clock derived from MCLK or PCLK
- µP access to PCM data
- Real Time Data with interrupt (open drain or TTL)
- Broadcast mode
- General Circuit Interface (GCI mode)
- Control and PCM data on a single port
- 2.048 Mbits/s data rate
- 2.048 MHz or 4.096 MHz clock option
- Performs the functions of four codec/filters
- Software programmable
- SLIC device input impedance and Transhybrid balance
- Transmit and receive gains and Equalization
- Programmable Digital I/O pins with debouncing
- A-law, µ-law, or linear coding
- Built-in test modes with loopback, tone generation, and µP access to PCM data
- Mixed state (analog and digital) impedance scaling
- Performance guaranteed over a 12 dB gain range
- Supports multiplexed SLIC device outputs
- 256 kHz or 293 kHz chopper clock for SLIC devices with switching regulator
- Maximum channel bandwidth for V.90 modems
