MT9085B Zarlink Semiconductor, Inc., MT9085B Datasheet

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MT9085B

Manufacturer Part Number
MT9085B
Description
1024 Channels TDM (ST-BUS) to Parallel Bus Access Circuit (PAC)
Manufacturer
Zarlink Semiconductor, Inc.
Datasheet

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MT9085BP
Manufacturer:
ZARLINK
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MT9085BP
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MITEL
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Features
Applications
S30
S31
Configurable for parallel-to-serial or
serial-to-parallel conversion of 1024 channels
Supports serial data rates of 2.048 Mbit/s or
4.096 Mbit/s
Interfaces to Zarlink’s MT9080 Switch Matrix
Module (SMX)
Generates all framing signals required in 1K or
2K switching applications
Expandable to 2048ch. systems
Compatible to ST-BUS
Custom designed small and medium digital
switch matrices using Zarlink MT9080B
Rate conversion applications
Interfacing a parallel system bus to devices
utilizing serial I/O
Telephony:PBX, CO, digital cross connects,
digital local loop
Datacom: Integrated Access Concentrators,
WAN/LAN gateways
S0
S1
Parallel/Serial
Registers
Shift
LOAD
C16
C4
Figure 1 - Functional Block Diagram
VSS
Address
Decoder
VDD
DS5141
Description
The MT9085 Parallel Access Circuit (PAC) provides
an interface between an 8 bit, parallel time division
multiplexed bus and a serial time division multiplexed
bus. A single PAC device will accept data clocked out
on the parallel bus of the Zarlink MT9080 (SMX) and
output it on 32/16 time division multiplexed serial bus
streams. A second device can be configured to
perform the conversion from the serial format into an
SMX compatible parallel format. The time division,
serial multiplexed streams may operate at 2.048
Mbit/s or at 4.096 Mbit/s. The PAC generates all
framing signals required by the SMX for 1024 and
2048 channel configurations.
PAC - Parallel Access Circuit
MT9085BP
C16
C4
Ordering Information
-40 ° C to 70 ° C
Generation
Control
Timing
Mode
ISSUE 4
68 Pin PLCC
MT9085B
March 1999
P0
P7
C4i
F0i
C16i
C2o
C4o
F0o
DFPo
DFPo
CFPo
OE
MCA
MCB
CKD
2/4S
2-125

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MT9085B Summary of contents

Page 1

... Mbit 4.096 Mbit/s. The PAC generates all framing signals required by the SMX for 1024 and 2048 channel configurations. Address Decoder VSS VDD Figure 1 - Functional Block Diagram MT9085B ISSUE 4 March 1999 Ordering Information MT9085BP 68 Pin PLCC -40 ° ° • • P7 C4i F0i C16i Timing C2o ...

Page 2

... MT9085B VSS S8 S9 S10 S11 S12 S13 VDD VSS S14 S15 S16 S17 S18 S19 S20 S21 2-126 Figure 2 - Pin Connections MCB 58 VSS C2o 55 C4o 54 DFPo 53 VDD 52 VSS 51 C16i 50 F0i 49 F0o ...

Page 3

... Connect Memory Frame Pulse (Output). Framing signal with a nominal 8 kHz frequency; goes low 71 (CKD= (CKD=1) C16 clock cycles before the frame boundary established by F0i. The signal is used by the connection memory in a typical switch configuration. See Figure 15 for timing information. Description for normal device operation. SS MT9085B 2-127 ...

Page 4

... MT9085B Pin Description (continued) Pin # Name 48 DFPo Data Memory Frame Pulse (Output). Framing signal with nominal 4 kHz frequency; changes state 64 (CKD= (CKD=1) C16 clock cycles after the frame boundary established by F0i. This signal is a complement of DFPo. See Figure 15 for timing information. The signal is used by SMXs (MT9080s) making up the Data Memory in a typical switch confi ...

Page 5

... Frame Boundary Established by F0i Ch. 31 Bit 0 Ch. 0 Bit 7 Ch. 63 Bit 0 Ch. 0 Bit 7 Frame Boundary Established by F0i Ch. 31 Bit 0 Ch. 0 Bit 7 Ch. 63 Bit 0 Ch. 0 Bit 7 MT9085B Ch. 0 Bit 6 Ch. 0 Bit 6 Ch. 0 Bit 5 Ch. 0 Bit 6 Ch. 0 Bit 6 Ch. 0 Bit 5 2-129 ...

Page 6

... MT9085B Frame Boundary established by F0i C16i CKD=0 Serial Output Ch. 31, Bit 0 S0-S31 Parallel Input MCB Parallel Input MCB CKD=1 Serial Ch. 31, Bit 0 Output S0-S31 Parallel Input ...

Page 7

... Y Figure 7 - Functional Data I/O Timing in Serial to Parallel Mode (MCA = 0) Ch. 0, Bit MT9085B Ch.0 Bit 2-131 ...

Page 8

... MT9085B Functional Description The MT9085 Parallel Access Circuit (PAC pin monolithic device. It interfaces a parallel 8 bit, time division, multiplexed bus time division multiplexed serial streams. The device can be configured to perform either parallel to serial conversion or serial to parallel conversion. A single PAC device can handle 1024 channels ...

Page 9

... SMX#1 is operated in Data Memory Mode-1. When the SMX is operated in Data Memory Mode-2, the maximum delay is two frames. In this case, the channels are double buffered; frame integrity is maintained for all switching configurations. MT9085B PAC #2 is configured to delay through the ...

Page 10

... MT9085B In the example configuration shown in Figure 9 the OE pin of PAC #2 is connected to D10 on the Connection Memory. Setting bit 10 high in the Connection Memory location corresponding to a serial channel timeslot will result in the output driver for the specific stream being disabled during that serial channel timeslot ...

Page 11

... For more information, see Zarlink’s Application Note MSAN-135, “Design of Large Digital Switching Matrices using the SMX/PAC“ (in this data book) and Application Sheet MSAS-62 “16.384 MHz Clock Generation for SMX/PAC“ (available from Zarlink). MT9085B ...

Page 12

... MT9085B Timing Source M4 C16 F0i C4i C16i PAC#1a S P0-P7 • • C16 • • • • • • S31 DFPo S31 DFPo 2/4S OE CKD MCA MCB F0 C4 C16 F0i C4i C16i PAC#1b S P0-P7 • • • • • • S31 • ...

Page 13

... MT9085B Min Max Units -0 -0 -0 °C -40 125 2 ) unless otherwise stated. SS Units Test Conditions ° Max Units Test Conditions 50 mA Outputs unloaded ...

Page 14

... MT9085B AC Electrical Characteristics Voltages are with respect to Ground (V ) unless otherwise stated. SS Characteristics 1 C16 Clock Period 2 C4 Clock Period 3 C16 Pulse Width Low 4 C16 Pulse Width High 5 C4 Setup Time 6 Frame Pulse Setup Time 7 Frame Pulse Hold Time † Timing is over recommended temperature & power supply voltages. ...

Page 15

... Data Memory and Connect Memory Frame Pulse (See ) unless otherwise stated. SS ‡ Sym Min Typ Max DFPo CFPo 71 C16 Cycles t CFPD t CFPD t CFPo MT9085B Units Test Conditions ST-BUS Frame Boundary Established by F0i 64 C16 Cycles t DFPo t DFPo 68 C16 Cycles t DFPo ...

Page 16

... MT9085B AC Electrical Characteristics (See Figure 16) - Voltages are with respect to Ground (V Characteristics 1 Serial Input Setup Time 2 Serial Input Hold Time 3 Serial Output Delay Active to Active High Impedance to Active Active to High Impedance † Timing is over recommended temperature & power supply voltages ° ‡ Typical figures are and are for design aid only: not guaranteed and not subject to production testing ...

Page 17

... Serial Input and Output Timing in 4 MHz Mode (2/4S=1) ) unless otherwise stated. SS ‡ Sym Min Typ Max Serial Bit Cell MT9085B Units Test Conditions =150pF =150pF =150pF 2-141 ...

Page 18

... MT9085B AC Electrical Characteristics to Ground (V ) unless otherwise stated. SS Characteristics 1 Parallel Output Delay 2 Parallel Output Delay High Impedance to Active 3 Parallel Output Delay Active to High Impedance † Timing is over recommended temperature & power supply voltages ° ‡ Typical figures are and are for design aid only: not guaranteed and not subject to production testing. ...

Page 19

... PZA 90% 10% t PZA † - Output Enable (OE) Timing, in Parallel to Serial Mode ) unless otherwise stated. SS ‡ Sym Min Typ Max t 2 OES t 10 OEH t OES t OEH t OEH MT9085B Units Test Conditions ns C =85pF =85pF L Units Test Conditions OES t OEH t OES 2-143 ...

Page 20

Package Outlines Dim D General- (lead coplanarity) A Notes Not ...

Page 21

North America - West Coast Tel: (858) 675-3400 Fax: (858) 675-3450 Tel: +65 333 6193 Fax: +65 333 6192 Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively “Zarlink”) ...

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