Infineon PEB4266TV12: A High-Performance ISDN S/T Interface Transceiver

The Infineon PEB4266TV12 stands as a highly integrated, monolithic CMOS circuit designed specifically for the physical layer interface in ISDN S/T (S₀) bus applications. It serves as the critical link between the digital terminal equipment and the ISDN network, providing full-duplex data transmission over a standard four-wire S-bus. This transceiver is engineered to deliver robust performance, reliability, and compliance with key international standards, including ITU-T I.430 and ETS 300 012.

A core strength of the PEB4266TV12 lies in its comprehensive integration. The device combines both the transmitter and receiver functions, along with all necessary line termination resistors, on a single chip. This high level of integration simplifies board design, reduces the external component count, and minimizes the overall system footprint. It features an internal echo canceller and a built-in digital phase-locked loop (DPLL) for clock recovery, which are essential for maintaining signal integrity and synchronizing with the network timing across the standard 144 kbit/s (2B+D) data stream.

The transceiver operates from a single 5V power supply and is designed for low power consumption, making it suitable for both powered and network-powered (NT) terminal equipment. Its transmitter section delivers a symmetrical, controlled-slew-rate output signal to the line, ensuring minimal electromagnetic interference (EMI). The receiver section is equally robust, employing an adaptive threshold mechanism to accurately detect incoming data even in the presence of signal attenuation and noise typical on extended bus lengths.

Furthermore, the PEB4266TV12 offers excellent diagnostic capabilities. It provides status signals such as Receive Signal Quality (RSQ), which indicates the presence of a valid line signal, and monitors for loss of frame synchronization. These features are invaluable for system debugging and maintaining a stable connection.

In summary, the Infineon PEB4266TV12 is a cornerstone component for ISDN terminal adapters, digital telephones, and other S₀ bus equipment, offering a complete, high-performance, and reliable physical layer solution.

ICGOODFIND: A highly integrated and compliant ISDN S/T transceiver, the PEB4266TV12 provides a complete physical layer solution with robust performance, echo cancellation, and diagnostic features for reliable data transmission.

Keywords: ISDN S/T Interface, Physical Layer Transceiver, Echo Cancellation, ITU-T I.430, Line Termination