ISO-CMOS ST-BUSTM Family
MT8980D
Digital Switch
Data Sheet
Features
February 2005
•
Zarlink ST-BUS compatible
•
8-line x 32-channel inputs
•
8-line x 32-channel outputs
•
256 ports non-blocking switch
•
Single power supply (+5 V)
•
Low power consumption: 30 mW Typ.
•
Microprocessor-control interface
•
Three-state serial outputs
Ordering Information
MT8980DE
MT8980DP
MT8980DPR
MT8980DP1
MT8980DE1
MT8980DPR1
40 Pin PDIP
44 Pin PLCC
44 Pin PLCC
44 Pin PLCC*
40 Pin PDIP*
44 Pin PLCC*
*Pb Free Matte Tin
Tubes
Tubes
Tape & Reel
Tubes
Tubes
Tape & Reel
-40°C to +85°C
Description
This VLSI ISO-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 MT8980 provides microprocessor read
and write access to individual ST-BUS channels.
C4i
VDD
F0i
VSS
Frame
Counter
STi0
Output
MUX
STi1
STi2
STi3
STi4
STi5
Serial
to
Parallel
Converter
ODE
Data
Memory
Control Register
STi6
STi7
Connection
Memory
STo0
Parallel
to
Serial
Converter
R/W A5/
A0
DTA D7/
D0
STo2
STo3
STo4
STo5
STo6
STo7
Control Interface
DS CS
STo1
CSTo
Figure 1 - Functional Block Diagram
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 1997-2005, Zarlink Semiconductor Inc. All Rights Reserved.
