ISDN S/T-Interface Transceiver II

The MC145574A second-generation S/T-Interface Transceiver provides an economical VLSI Layer 1 interface for the transportation of two 64 kbps B channels and one 16 kbps D channel between the network termination (NT) and terminal equipment (TE). The MC145574A conforms to CCITT I.430, ANSI T1.605, and ETSI ETS 300 012 specifications.

The device provides the modulation/line-drive and demodulation/line-receive functions required of the interface. In addition, it provides activation/deactivation, error monitoring, framing, bit, and octet timing. The MC145574A provides the control signals for the interface to the Layer 2 devices. Complete multiframe capability is provided.

The Interchip Digital Link (IDL2) is supported for the exchange of 2B+D channel information between ISDN components and systems. Transceiver operation is programmed through the industry standard Serial Control Port (SCP). As an alternative to IDL+SCP combination, a General Circuit Interface (GCI) is provided.