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MT8979AE PDF预览

MT8979AE

更新时间: 2024-10-27 22:51:03
品牌 Logo 应用领域
MITEL PC
页数 文件大小 规格书
26页 343K
描述
ISO-CMOS ST-BUS⑩ FAMILY CEPT PCM 30/CRC-4 Framer & Interface

MT8979AE 数据手册

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ISO-CMOS ST-BUS FAMILY  
MT8979  
CEPT PCM 30/CRC-4 Framer & Interface  
ISSUE 7  
May 1995  
Features  
Ordering Information  
Single chip primary rate 2048 kbit/s CEPT  
transceiver with CRC-4 option  
MT8979AC  
MT8979AE  
MT8979AP  
28 Pin Ceramic DIP  
28 Pin Plastic DIP  
44 Pin PLCC  
Meets CCITT Recommendation G.704  
Selectable HDB3 or AMI line code  
-40° to 85°C  
Tx and Rx frame and multiframe  
synchronization signals  
Two frame elastic buffer with 32 µsec jitter  
buffer  
Frame alignment and CRC error counters  
Description  
Insertion and detection of A, B, C, D signalling  
bits with optional debounce  
The MT8979 is a single chip CEPT digital trunk  
transceiver that meets the requirements of CCITT  
Recommendation G.704 for digital multiplex  
equipment.  
On-chip attenuation ROM with option for ADI  
codecs  
Per channel, overall and remote loop around  
ST-BUS compatible  
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  
VDD  
RxD  
TxMF  
ST-BUS  
Timing  
Circuitry  
C2i  
F0i  
2 Frame  
Elastic Buffer  
with Slip  
RxMF  
Digital  
Attenuator  
ROM  
RxA  
Remote  
&
Digital  
Loop-  
backs  
Control  
RxB  
TxA  
TxB  
DSTi  
CEPT  
Link  
Interface  
PCM/Data  
Interface  
DSTo  
ADI  
CSTi0  
CSTi1  
CSTo  
Serial  
Control  
Interface  
ABCD Bit RAM  
Phase  
Detector  
E2i  
CEPT  
Counter  
XCtl  
XSt  
E8Ko  
Control Logic  
VSS  
Figure 1 - Functional Block Diagram  
4-161  

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