MT8950 Datasheet, PDF (1/16 Pages) Mitel Networks Corporation – ISO-CMOS ST-BUS™ FAMILY Data Codec

ISO-CMOS ST-BUS™ FAMILY MT8950
®
Data Codec
Features
• Transparent coding and decoding of 0 to 8, 9.6
and 19.2 kbps data
• Coding compatible to PCM voice channels at
56/64 kbps in ST-BUS format
• Automatic line polarity detection and correction
• Loopback facility for test purposes
• Selectable data formats: RZ or NRZ
• Eight user selectable modes of operation
• Low power ISO-CMOS technology
Applications
• Transparent coder/decoder for synchronous
and asynchronous data
• Data terminal (RS-232C, etc.) to ST-BUS
interface
• Data switching on digital PBXs
• Channel banks/TDM multiplexers
ISSUE 4
November 1990
Ordering Information
MT8950AC 24 Pin Ceramic DIP
0°C to 70°C
Description
The MT8950 is a coder/decoder which uses the
Transition Encoded Modulation (TEM) technique for
encoding/decoding low speed data to and from a 56/
64 kbps channel (equivalent to PCM Voice). The
coding and decoding scheme is transparent and can
accept either synchronous or asynchronous data up
to 8 kbps (inclusive); at 9.6 kbps and 19.2 kbps.
The MT8950 is fabricated in MITEL’s ISO-CMOS
technology.
DP
SCLK
D_R1
D_R2
DF
D_X1
D_X2
RxE
NRZo
SPi
NRZ/RZ
Output
Circuit
NRZ/RZ
Input
Circuit
Timing
& Mode
Control
Control
Register
Decoder
Encoder
Monitoring
Interface
Enable
Logic
ST-BUS
Interface
PRST
V_DD
V_SS
Figure 1 - Functional Block Diagram
C2i
F1i
CA
DSTi
DSTo
CSTi
DA
SPo
6-3