MT8982-1 Datasheet, PDF (1/19 Pages) Mitel Networks Corporation – ISO-CMOS ST-BUS™ FAMILY Small Digital Switch (MiniDX)

ISO-CMOS ST-BUS™ FAMILY MT8982
®
Small Digital Switch (MiniDX)
Features
• ST-BUS/GCI compatible switch matrix
• 64 channel non-blocking time switch
• 2 x 32 channel serial inputs and outputs
• Per-channel tristate control
• 4-pin serial microprocessor interface
• Patented message mode
• Low power consumption (10 mW)
• Single 5 volt supply
Applications
• Cost sensitive digital switching applications
• Digital key telephone systems
• GCI/ST-BUS conversion
• ST-BUS device control interface
• ISDN telephone set support circuit
• Interprocessor communication
ISSUE 6
Ordering Information
MT8982AE 16 Pin Plastic DIP
MT8982AS 16 Pin SOIC
MT8982AN 20 Pin SSOP
-40 to +85°C
May 1995
Description
The MT8982 Small Digital Switch (MiniDX) is a non-
blocking CMOS time switch with a capacity of up to
64 - 8 bit Time Division Multiplexed (TDM) encoded
voice or data channels. It is a size-optimized version
of MITEL's successful MT8980D Digital Switches,
providing switching capability in cost sensitive
applications such as telephone sets and digital key
systems. The TDM interface to the device is via two
pairs of 2048 kbit/s serial streams with 32 64 kbit/s
channels per stream (ST-BUS). A serial microport
provides access to the device for programming the
required connections. The serial microport is
compatible with most common microcontrollers. The
unique message mode capability allows the MT8982
to act as a controller for other members of MITEL's
ST-BUS family of components.
STi0
STi1
F0i
C4i
F0o
RxD/CSTi0
TxD/NC
SCLK/CSTi1
CS/CMS
MPS
ODE
Serial
to
Parallel
Converter
Address
Counters
Serial
Microport
64 x 8
Data Memory
Address
Mux
Data
Mux
64 x 9
Connect Memory
Address
Mux
Output
Mux
Parallel
to
Serial
Converter
STo0
STo1
3-State
Control
Figure 1 - Functional Block Diagram
2-31