MT89L80 Datasheet, PDF (1/17 Pages) Mitel Networks Corporation – CMOS ST-BUS™ FAMILY Digital Switch

Features
• 3.3 volt supply
• 5 V tolerant inputs and TTL compatible outputs.
• 256 x 256 channel non-blocking switch
• Accepts serial streams at 2.048 Mb/s
• Per-channel three-state control
• Patented per channel message mode
• Non-multiplexed microprocessor interface
• Zarlink ST-BUS compatible
• Low power consumption: typical 15 mW
• Pin compatible with the MT8980DP
Applications
• Key telephone systems
• PBX systems
• Small and medium voice switching systems
CMOS ST-BUS^TM Family MT89L80
Digital Switch
Data Sheet
Sept. 2006
Ordering Information
MT89L80ANR
MT89L80APR
MT89L80AP
MT89L80AN
MT89L80APR1
MT89L80ANR1
MT89L80AN1
MT89L80AP1
48 Pin SSOP
44 Pin PLCC
44 Pin PLCC
48 Pin SSOP
44 Pin PLCC*
48 Pin SSOP*
48 Pin SSOP*
44 Pin PLCC*
*Pb Free Matte Tin
Tape & Reel
Tape & Reel
Tubes
Tubes
Tape & Reel
Tubes
Tubes
Tubes
-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
DS CS R/W A5/ DTA D7/
A0
D0
CSTo
** for 48-pin SSOP only
Figure 1 - Functional Block Diagram
1
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