MT9171AE Zarlink Semiconductor, Inc., MT9171AE Datasheet

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MT9171AE

Manufacturer Part Number
MT9171AE
Description
Interface, Digital Subscriber Interface Circuit
Manufacturer
Zarlink Semiconductor, Inc.
Datasheet

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Features
Applications
F0o/RCK
DSTo/Do
C4/TCK
CDSTo/
F0/CLD
DSTi/Di
CDSTi/
Full duplex transmission over a single twisted
pair
Selectable 80 or 160 kbit/s line rate
Adaptive echo cancellation
Up to 3km (9171) and 4 km (9172)
ISDN compatible (2B+D) data format
Transparent modem capability
Frame synchronization and clock extraction
Zarlink ST-BUS compatible
Low power (typically 50 mW), single 5V supply
Digital subscriber lines
High speed data transmission over twisted
wires
Digital PABX line cards and telephone sets
80 or 160 kbit/s single chip modem
RegC
MS0
MS1
MS2
CDo
CDi
Transmit
Interface
Control
Register
Transmit/
Clock
Receive
Timing &
Control
Status
Interface
Receive
Phase Locked
Master Clock
Sync Detect
Transmit
Timing
Receive
Prescrambler
Prescrambler
DPLL
De-
Figure 1 - Functional Block Diagram
ISO
V
Scrambler
DD
Error
Signal
2
V
Descrambler
-CMOS ST-BUS
SS
Echo Canceller
Address
V
DS5130
Description
The MT9171 (DSIC) and MT9172 (DNIC) are pin for
pin compatible replacements for the MT8971 and
MT8972,
devices capable of providing high speed, full duplex
digital transmission up to 160 kbit/s over a twisted
wire pair.
techniques and transfer data in (2B+D) format
compatible to the ISDN basic rate. Several modes of
operation
telecommunication networks including use as a high
speed limited distance modem with data rates up to
160 kbit/s. Both devices function identically but with
the DSIC having a shorter maximum loop reach
specification. The generic "DNIC" will be used to
reference both devices unless otherwise noted.
The MT9171/72 is fabricated in Zarlink’s ISO
CMOS process.
Bias
Echo Estimate
Digital Subscriber Interface Circuit
V
Ref
Digital Network Interface Circuit
Encoded Biphase
MT9171AE
MT9171AN
MT9171AP
MT9172AE
MT9172AN
MT9172AP
+
Differentially
Transmitter
respectively.
allow
Encoded Biphase
They use adaptive echo-cancelling
Differentially
Receive
Receiver
Filter
Ordering Information
-40 C to
an
FAMILY
22 Pin Plastic DIP (400 mil)
24 Pin SSOP
28 Pin PLCC
22 Pin Plastic DIP (400 mil)
24 Pin SSOP
28 Pin PLCC
ISSUE 3
easy
They
V
+
Bias
Line Driver
Transmit
85 C
Filter &
interface
+2
-1
MT9171/72
are
MUX
multi-function
February 1999
to
Precan
OSC2
OSC1
L
L
L
DIS
digital
IN
OUT
OUT
9-115
9-115
2
-

Related parts for MT9171AE

MT9171AE Summary of contents

Page 1

... Prescrambler Interface CDSTo/ CDo 2 ISO -CMOS ST-BUS Digital Subscriber Interface Circuit Digital Network Interface Circuit DS5130 MT9171AE MT9171AN MT9171AP MT9172AE MT9172AN MT9172AP Description The MT9171 (DSIC) and MT9172 (DNIC) are pin for pin compatible replacements for the MT8971 and MT8972, respectively. ...

Page 2

MT9171/ LOUT 2 21 VBias 20 VRef 3 19 MS2 MS1 17 MS0 6 16 RegC F0/CLD 14 9 CDSTi/CDi 13 10 CDSTo/CDo 12 11 VSS 22 PIN PDIP Pin Description Pin ...

Page 3

Advance Information Pin Description (continued) Pin # Name DSTi/Di Data ST-BUS In/Data In (Digital). A 2.048 Mbit/s serial PCM/data input in DN mode. In MOD mode this is a continuous bit stream at the ...

Page 4

MT9171/ DSTi DSTo F0o Channel Time 0 Figure Port - 80 kbit/s (Modes DSTi ...

Page 5

Advance Information Functional Description The MT9171/ device which may be used in practically any application that requires high speed data transmission over two wires, including smart telephone sets, workstations, data terminals and computers. The device supports the 2B+D ...

Page 6

MT9171/72 9-120 Advance Information ...

Page 7

Advance Information In DIGITAL NETWORK (DN) mode, upon entering the DNIC from the DV and CD ports, the B-channel data, D-channel D0 (and D1 for 160 kbit/s), the HK bit of the C-channel (160kbit/s only) and a SYNC bit are ...

Page 8

MT9171/72 of the near end signal may be disabled by holding the Precan pin high. This mode simplifies the design of external line transceivers used for loop extension applications. The Precan pin features an internal pull-down which allows this unconnected ...

Page 9

Advance Information the C-channel and D-Channel also at kbit/ mode, both the DV and CD ports operate as ST-BUS streams at 2.048 Mbit/s. transfers data over pins DSTi and DSTo while on the CD port, the CDSTi and ...

Page 10

MT9171/72 channel 16 or vice versa. One other feature exists; ODE, where both the DV and CD ports are tristated in order that no devices are damaged due to excessive loading while all DNICs are in a random state on ...

Page 11

Advance Information transparently through the DNIC and is transmitted to or received from the line at the bit rate selected in the Control Register. If the bit rate is 80 kbit/s, only D0 is transmitted and received. At 160 kbit/s, ...

Page 12

MT9171/72 C-Channel Internal Control (Bit 0-7) Register XXX01111 00000000 XXX11111 00010000 Notes: Default Mode 1 can also be selected by tying CDSTi/CDi pin low when DNIC is operating in dual mode. Default Mode 2 can also be selected by tying ...

Page 13

Advance Information 0 1 SYNC CHQual Status Name Register 0 SYNC Synchronization - When set this bit indicates that synchronization to the received line data sync pattern has been acquired. For DN mode only. 1-2 CHQual Channel Quality - These ...

Page 14

MT9171/72 Bits Bit 7 Bit 6 Data 1 1 NRZ Data Differential Encoded Differential Encoded Biphase Transmit Line Signal Note: Last bit sent was a logic SYNC OUT Figure 11 - Frame Format ...

Page 15

Advance Information Applications Typical connection diagrams are shown in Figures 13 and 14 for the DN mode as a MASTER and SLAVE, respectively connected to the coupling OUT transformer through a resistor R2 and capacitors C2 and C2’ ...

Page 16

MT9171/72 Absolute Maximum Ratings Parameter 1 Supply Voltage 2 Voltage on any pin (other than supply) 3 Current on any pin (other than supply) 4 Storage Temperature 5 Package Power Dissipation (Derate 16mW/ C above Exceeding these ...

Page 17

Advance Information AC Electrical Characteristics Characteristics 1 Input Voltage 2 Input Impedance I 3 Crystal/Clock Frequency Crystal/Clock Tolerance U 5a Crystal/Clock Duty Cycle Crystal/Clock Duty Cycle 6 Crystal/Clock Loading 7 Output Capacitance O U ...

Page 18

MT9171/72 2.0V C4 0.8V 2.0V F0 0.8V Figure Clock & Frame Pulse Alignment for ST-BUS Streams in DN Mode 2.0V C4 0.8V 3.0V OSC1 2.0V Figure 17 - Frequency Locking for the C4 and OSC1 Clocks in ...

Page 19

Advance Information AC Electrical Characteristics Characteristics 1 DSTi/CDSTi Data Setup Time 2 DSTi/CDSTi Data Hold Time 3a DSTo/CDSTo Data Delay 3b DSTo/CDSTo High Z to Data Delay † Timing is over recommended temperature & power supply voltage ranges. Bit Stream ...

Page 20

MT9171/72 Tx Bit Stream 2.4V TCK 0.4V 2.0V Di CDI 0.8V 2.4V CDo 0.4V Rx Bit Stream RCK 2.4V Do 0.4V Figure 20 - Data Timing for Master Modem Mode 9-134 Bit Cell Bit Cell t ...

Page 21

Advance Information 2.4V TCK 0.4V 2.0V Di CDI 0.8V 2.4V CDo 0.4V RCK 2.4V Do 0.4V Figure 21 - Data Timing for Slave Modem Mode MT9171/ 9-135 ...

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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 ...

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