MT8981DE Zarlink Semiconductor, MT8981DE Datasheet

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MT8981DE

Manufacturer Part Number
MT8981DE
Description
Manufacturer
Zarlink Semiconductor
Datasheet

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Part Number
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Quantity
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Part Number:
MT8981DE
Manufacturer:
ZARLINK
Quantity:
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Part Number:
MT8981DE
Manufacturer:
MITEL
Quantity:
20 000
Features
STi0
STi1
STi2
STi3
Zarlink ST-BUS compatible
4-line x 32-channel inputs
4-line x 32-channel outputs
128 ports non-blocking switch
Single power supply (+5 V)
Low power consumption: 30 mW Typ.
Microprocessor-control interface
Three-state serial outputs
Converter
Parallel
Serial
to
Memory
Data
Figure 1 - Functional Block Diagram
DS
C4i
Counter
Frame
CS R/W A5/
Control Register
Control Interface
F0i
ISO-CMOS ST-BUS  FAMILY
A0
V
DD
Description
This VLSI ISO-CMOS device is designed for
switching PCM-encoded voice or
microprocessor
exchange, PBX or Central Office. It provides
simultaneous connections for up to 128 64 kbit/s
channels. Each of the four serial inputs and outputs
consist of 32 64 kbit/s channels multiplexed to form a
2048 kbit/s ST-BUS stream. In addition, the MT8981
provides microprocessor read and write access to
individual ST-BUS channels.
DTA D7/
V
SS
D0
MT8981DE
MT8981DP
Connection
Memory
Output
MUX
Ordering Information
control,
-40 ° C to +85 ° C
40 Pin Plastic DIP
44 PLCC
ISSUE8
in
Converter
Parallel
Serial
a
ODE
Digital Switch
to
MT8981D
modern
data, under
March 1997
STo0
STo1
STo2
STo3
digital
2-17

Related parts for MT8981DE

MT8981DE Summary of contents

Page 1

... STi1 to Memory Parallel STi2 Converter STi3 ISO-CMOS ST-BUS  FAMILY MT8981DE MT8981DP Description This VLSI ISO-CMOS device is designed for switching PCM-encoded voice or microprocessor exchange, PBX or Central Office. It provides simultaneous connections for up to 128 64 kbit/s channels. Each of the four serial inputs and outputs consist kbit/s channels multiplexed to form a 2048 kbit/s ST-BUS stream ...

Page 2

MT8981D ISO-CMOS STi3 VDD 12 F0i 13 C4i PIN PLCC Pin Description Pin # Name 40 44 DIP PLCC 1 2 DTA Data ...

Page 3

Pin Description (continued) Pin # Name 40 44 DIP PLCC 22- 25- D7-D5 Data (Three-state I/O Pins). These are the bidirectional data pins on the 24 27 microprocessor interface. 25- 29- D4-D0 Data (Three-state ...

Page 4

MT8981D ISO-CMOS Functional Description In recent years, there has been a trend in telephony towards digital switching, particularly in association with software control. Simultaneously, there has been a trend in system architectures towards distributed processing or multi-processor systems. In accordance ...

Page 5

Control Register, which may be written to or read from via the Control Interface. The lower order bits come from the address lines directly. The Control Register also allows the chip to broadcast messages on all ST-BUS outputs (i.e., to ...

Page 6

MT8981D ISO-CMOS 7 7 BIT NAME 2 Message When 1, the contents of the corresponding location in Connection Memory Low are Channel output on the location’s channel and stream. When 0, the contents of the corresponding location in Connection Memory ...

Page 7

If bit 6 of the Control Register is 0, then bits 2 and 0 of each Connection Memory High location function normally (see Fig. 5). If bit the associated ST- BUS output channel is in Message Mode; ...

Page 8

MT8981D ISO-CMOS Speech Switch - 8981 Controlling Micro- Processor Control & Signalling - 8981 Figure 8 - Example Architecture of a Simple Digital Switching System Application Circuit with 6802 Processor Fig. 10 shows an example of a complete circuit which ...

Page 9

D7-D0 A15-A0 MEK6802D3 System R/W MR VMA E DTA 1 40 STi0 2 39 STi1 3 38 909 Ω , STi2 4 37 STi3 5 36 1/4W STi4 6 35 STi5 7 34 STi6 STi7 9 ...

Page 10

MT8981D ISO-CMOS Absolute Maximum Ratings* Parameter Voltage on Digital Inputs 3 Voltage on Digital Outputs 4 Current at Digital Outputs 5 Storage Temperature 6 Package Power Dissipation * Exceeding these values may cause ...

Page 11

AC Electrical Characteristics Characteristics 1 Clock Period* 2 Clock Width High I 3 Clock Width Low Clock Transition Time Frame Pulse SetupTime S 6 Frame Pulse Hold Time 7 Frame Pulse Width † Timing ...

Page 12

MT8981D ISO-CMOS AC Electrical Characteristics Characteristics 1 STo0/3 Delay - Active to High Z 2 STo0/3 Delay - High Z to Active STo0/3 Delay - Active to Active STo0/3 Hold Time U 5 Output ...

Page 13

AC Electrical Characteristics Characteristics 1 Chip Select Setup Time 2 Read/Write Setup Time 3 Address Setup Time 4 Acknowledgement Delay Fast Slow 5 Fast Write Data Setup Time 6 Slow Write Data Delay 7 Read Data Setup Time 8 Data ...

Page 14

MT8981D ISO-CMOS Notes: 2-30 ...

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... For more information about all Zarlink products Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively “Zarlink”) is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use ...

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