MC145474

The MC145474 provides an economical VLSI layer 1 interface for the transportation of two 64 kpbs B channels and one 16 kbps D channel between the network termination or NT and terminal equipment applications or TEs. The MC145474 features the interchip digital link (IDL) for the exchange of the 2B+D channel information between ISDN components and systems.

The features of MC145474 can be summarized as:(1)Conforms to CCITT I.430 and ANSI T1.605 Specifications; (2)Detects Far-End Code Violations (FECVs) in the NT mode; (3)Incorporates the IDL; (4)Pin Selectable NT or TE Modes of Operation; (5)Industry Standard Microprocessor SCP; (6)Supports 1:1 Transformers for Transmit and Receive; (7)Exceeds the Recommended Range of Operation in all Configurations; (8)Complete Multiframing Capability Supported (SC1-SC5 and Q Channel); (9)Optional B Channel Idle, Invert, or Exchange; (10)Supports Full Range of S/T and IDL Loopbacks; (11)Supports Transmit Power Down and Absolute Minimum Power Mode; (12)Supports Crystal or External Clock Input Mode; (13)MC145475 Bonded Out for NT1 Star Mode of Operation; (14)CMOS Design for Low Power Operation.

The absolute maximum ratings of MC145474 are:(1)Supply Voltage:-0.3V to + 7.0 V; (2)Input Voltage (any pin to VSS):-0.3V to VDD+ 0.3 V; (3)DC Current, any pin (excluding VDD, VSS,TxP, and TxN):±10 mA; (4)Operating Temperature:-40°C to + 85 °C; (5)Storage Temperature:-85°C to + 150 °C.

If you want to know more information such as the electrical characteristics about the MC145474, please download the datasheet in www.seekic.com or www.chinaicmart.com .