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MT8979

Part Number	MT8979
Manufacturer	Mitel Networks Corporation
Description	ISO-CMOS ST-BUS FAMILY CEPT PCM 30/CRC-4 Framer & Interface
Published	Sep 11, 2005
Detailed Description	® ISO-CMOS ST-BUS™ FAMILY MT8979 CEPT PCM 30/CRC-4 Framer & Interface Features • • • • • • • • • • Single chip primary...
Datasheet	MT8979 PDF File

Overview

® ISO-CMOS ST-BUS™ FAMILY MT8979 CEPT PCM 30/CRC-4 Framer & Interface Features • • • • • • • • • • Single chip primary rate 2048 kbit/s CEPT transceiver with CRC-4 option Meets CCITT Recommendation G.
704 Selectable HDB3 or AMI line code Tx and Rx frame and multiframe synchronization signals Two frame elastic buffer with 32 µ sec jitter buffer Frame alignment and CRC error counters Insertion and detection of A, B, C, D signalling bits with optional debounce On-chip attenuation ROM with option for ADI codecs Per channel, overall and remote loop around ST-BUS compatible ISSUE 7 May 1995 Ordering Information MT8979AC 28 Pin Ceramic DIP MT8979AE 28 Pin Plastic DIP MT8979AP 44 Pin PLCC -40° to 85°C Description The MT8979 is a single chip CEPT digital trunk transceiver that meets the requirements of CCITT Recommendation G.
704 for digital multiplex equipment.
The MT8979 is fabricated in Mitel’s low power ISO-CMOS technology.
Applications • • • • Primary rate ISDN network nodes Multiplexing equipment Private network: PBX to PBX links High speed computer to computer links TxMF C2i F0i RxMF DSTi DSTo ADI CSTi0 CSTi1 CSTo VDD ST-BUS Timing Circuitry Digital Attenuator ROM 2 Frame Elastic Buffer with Slip Control CEPT Link Interface RxD RxA RxB TxA TxB PCM/Data Interface Remote & Digital Loopbacks Serial Control Interface ABCD Bit RAM Phase Detector XCtl XSt Control Logic CEPT Counter E2i E8Ko VSS Figure 1 - Functional Block Diagram 4-161 MT8979 ISO-CMOS 28 PIN CERDIP/PDIP Figure 2 - Pin Connections Pin Description Pin # Name DIP PLCC Description Transmit A (Output): A split phase unipolar signal suitable for use with TxB and an external line driver and transformer to construct the bipolar line signal.
Transmit B (Output:) A split phase unipolar signal suitable for use with TxA and an external line driver and transformer to construct the bipolar line signal.
Data ST-BUS (Output): A 2048 kbit/s serial output stream which contains the 30 PCM or data channels...

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