MT89L80 Datasheet, PDF (1/15 Pages) Mitel Networks Corporation – CMOS ST-BUS™ FAMILY Digital Switch

CMOS ST-BUS™ FAMILY
MT89L80
Digital Switch
Advance Information
Features
• 3.3 volt supply
• 5V tolerant inputs and TTL compatible outputs.
• 256 x 256 channel non-blocking switch
• Accepts serial streams at 2.048Mb/s
• Per-channel three-state control
• Patented per channel message mode
• Non-multiplexed microprocessor interface
• Mitel ST-BUS compatible
• Low power consumption: typical 15mW
• Pin compatible with the MT8980DP
Applications
• Key telephone systems
• PBX systems
• Small and medium voice switching systems
DS5196
ISSUE 2
September 1999
Ordering Information
MT89L80AP 44 Pin PLCC
MT89L80AN 48 Pin SSOP
-40°C to +85°C
Description
This VLSI CMOS device is designed for switching
PCM-encoded voice or data, under microprocessor
control, in a modern digital exchange, PBX or
Central Office. It provides simultaneous connections
for up to 256 64 kbit/s channels. Each of the eight
serial inputs and outputs consist of 32 64 kbit/s
channels multiplexed to form a 2048 kbit/s ST-BUS
stream. In addition, the MT89L80 provides
microprocessor read and write access to individual
ST-BUS channels.
STi0
STi1
STi2
STi3
STi4
STi5
STi6
STi7
Serial
to
Parallel
Converter
C4i
F0i
**
RESET
V_DD V_SS
Data
Memory
Frame
Counter
Control Register
Control Interface
Output
MUX
Connection
Memory
ODE
Parallel
to
Serial
Converter
STo0
STo1
STo2
STo3
STo4
STo5
STo6
STo7
** for 48-pin SSOP only
DS CS R/W A5/ DTA D7/
A0
D0
CSTo
Figure 1 - Functional Block Diagram
2-3