STLC5048

Codecs Overview

The STLC5048 is a monolithic, fully programmable four-channel codec and filter designed for telephony applications. It operates on a single +3.3 V supply and features an analog interface with receive output buffers driving SLIC RX inputs and amplifier input stages driven by SLIC TX outputs. The device generates an internal mid-supply reference level (AGND) for all analog signals. Its PCM interface utilizes a common 8 kHz frame sync pulse for transmit and receive directions, with automatic detection of bit clock frequencies at 1.536/1.544 MHz, 2.048 MHz, 4.096 MHz, or 8.192 MHz. Two PCM ports are provided, allowing channels to connect to port A or B. Device programmability is achieved via registers controlling TX/RX gains, line impedance, transhybrid balance, equalization, encoding laws (A/m), time slot assignment, power states, loopbacks, and PCM bit offsets.

Codecs Feature Summary

• Fully programmable monolithic architecture supporting four independent channels with integrated filtering capabilities.
• Automatic detection of PCM highway formats including 1.536/1.544 MHz, 2.048 MHz, 4.096 MHz, and 8.192 MHz standards.
• Configurable audio processing parameters including A-law/mu-law encoding, linear coding options, and programmable frequency response equalization.
• Integrated SLIC control interface featuring static I/Os and dynamic I/Os with chip select lines for managing line current limits and off-hook detection thresholds.

Codecs Applications

• Telecommunications systems requiring multi-channel voice processing
• Digital subscriber line access multiplexers (DSLAM)
• PBX and central office equipment interfaces
• Voice gateways and media termination units

Codecs Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific revision status as the datasheet indicates this product may be obsolete. Ensure compatibility with existing system voltage levels and interface protocols before integration into new designs.

Codecs Selection Notes

Select this component when a single-chip solution for four-channel codec and filtering is required. Ensure the design supports a single +3.3 V supply and accommodates the TQFP64 package dimensions. Verify that the host microcontroller can support the serial control interface running up to 8 MHz for register programming and configuration.

Codecs Part Context

The STLC5048 belongs to STMicroelectronics' portfolio of specialized audio and telephony interface components. It serves as a comprehensive solution for integrating analog voice paths with digital PCM networks in communication infrastructure. The device consolidates multiple discrete functions into a single monolithic IC to reduce board space and design complexity.

Codecs Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the datasheet marks the product as obsolete, consult official STMicroelectronics resources for current equivalent series or updated replacement recommendations.