MC145574A中文资料ISDN S/T-Interface Transceiver II数据手册恩XP规格书

描述 Description

Overview 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.

特性 Features

•Fully-Activated Power Consumption of 90 mW
•6-Channel Timeslot Assigner
•Interchip Digital Link-2 (IDL2)
•General Circuit Interface (GCI)
•Compliant with ANSI T1.605-1991, ITU-TI.430, and ETSI ETS 300
•Control, Status, and Maintenance Functions Accessible Through
•Pin-Selectable Network Termination (NT) or Terminal Equipment
•Supports 2.5:1 Transformers for Transmit and Receive
•Complete Multiframing Capability (SC1 - SC5 and Q-Channel)
•Optional B-Channel Idle, Invert, or Exchange
•Supports Full Range of S/T and IDL Loopbacks
•Transmit Power Down, Sleep, and Absolute Minimum Power Modes
•Crystal or External Clock Input Modes
•Support for NT Star and NT Terminal Modes
•Supports TE Slave-Slave Mode
•Minimal Power Requirements Ease Power Management and System
•On-Chip Mean Fewer External Components and Lower
•Versatile Digital Interface Enhances Design Flexibility
•Superior Transmission Performance Results in Increased System
•Evaluation Kit and Comprehensive Applications Support from NXP®