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Maxim Integrated Semiconductor Electronic Components Datasheet

DS32512 Datasheet

6-/8-/12-Port DS3/E3/STS-1 LIU

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+
DS32506/DS32508/DS32512
6-/8-/12-Port DS3/E3/STS-1 LIU
www.maxim-ic.com
GENERAL DESCRIPTION
The DS32506 (6 port), DS32508 (8 port), and
DS32512 (12 port) line interface units (LIUs) are
highly integrated, low-power, feature-rich LIUs for
DS3, E3, and STS-1 applications. Each LIU port in
these devices has independent receive and transmit
paths, a jitter attenuator, full-featured pattern
generator and detector, performance-monitoring
wwwco.DuanttaeSrhse,eat4nUd.caomcomplete set of loopbacks. An on-
chip clock adapter generates all line-rate clocks from
a single input clock. Ports are independently software
configurable for DS3, E3, and STS-1 and can be
individually powered down. Control interface options
include 8-bit parallel, SPI™, and hardware mode.
APPLICATIONS
SONET/SDH and PDH
Multiplexers
ATM and Frame Relay
Equipment
WAN Routers and
Switches
Digital Cross-
Connects
Access Concentrators
CSUs/DSUs
PBXs
DSLAMs
FUNCTIONAL DIAGRAM
LINE IN
DS3, E3,
OR STS-1
LINE OUT
DS3, E3,
OR STS-1
EACH LIU
RXP
RXN
CLK
DATA
Dallas
Semiconductor
DS325xx
TXP
TXN
CLK
DATA
RECEIVE
CLOCK
AND DATA
CONTROL
AND
STATUS
TRANSMIT
CLOCK
AND DATA
FEATURES
Pin-Compatible Family of Products
Each Port Independently Configurable
Receive Clock and Data Recovery for Up to 457
meters (1500 feet) of 75Ω Coaxial Cable
Standards-Compliant Transmit Waveshaping
Uses 1:1 Transformers on Both Tx and Rx
Three Control Interface Options: 8/16-Bit
Parallel, SPI, and Hardware Mode
Jitter Attenuators (One Per Port) Can be Placed
in the Receive Path or the Transmit Path
Jitter Attenuators Have Provisionable Buffer
Depth: 16, 32, 64, or 128 Bits
Built-In Clock Adapter Generates All Line-Rate
Clocks from a Single Input Clock (DS3, E3, STS-1,
12.8MHz, 19.44MHz, 38.88MHz, 77.76MHz)
Per-Port Programmable Internal Line Termination
Requiring Only External Transformers
High-Impedance Tx and Rx, Even When VDD = 0,
Enables Hot-Swappable, 1:1 and 1+1 Board
Redundancy Without Relays
Per-Port BERT for PRBS and Repetitive Pattern
Generation and Detection
Tx and Rx Open and Short Detection Circuitry
Transmit Driver Monitor Circuitry
Receive Loss-of-Signal (LOS) Monitoring
Compliant with ANSI T1.231 and ITU G.775
Automatic Data Squelching on Receive LOS
Large Line Code Performance-Monitoring
Counters for Accumulation Intervals Up to 1s
Local and Remote Loopbacks
Transmit Common Clock Option
Power-Down Capability for Unused Ports
Low-Power 1.8V/3.3V Operation (5V Tolerant I/O)
Industrial Temperature Range: -40°C to +85°C
Small Package: 23mm x 23mm, 484-Pin BGA
IEEE 1149.1 JTAG Support
ORDERING INFORMATION
PART
LIUs TEMP RANGE PIN-PACKAGE
DS32506
DS32506N
DS32508
DS32508N
DS32512
DS32512N
6 0°C to +70°C 484 BGA
6 -40°C to +85°C 484 BGA
8 0°C to +70°C 484 BGA
8 -40°C to +85°C 484 BGA
12 0°C to +70°C 484 BGA
12 -40°C to +85°C 484 BGA
Note: Add the “+” suffix for the lead-free package option.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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REV: 103008


Maxim Integrated Semiconductor Electronic Components Datasheet

DS32512 Datasheet

6-/8-/12-Port DS3/E3/STS-1 LIU

No Preview Available !

DS32506/DS32508/DS32512
TABLE OF CONTENTS
1. STANDARDS COMPLIANCE .............................................................................................6
2. BLOCK DIAGRAM ..............................................................................................................7
3. APPLICATION EXAMPLE ..................................................................................................8
4. DETAILED DESCRIPTION..................................................................................................9
5. DETAILED FEATURES.....................................................................................................11
5.1 GLOBAL FEATURES .......................................................................................................................11
5.2 RECEIVER .....................................................................................................................................11
5.3 TRANSMITTER ...............................................................................................................................11
5.4 JITTER ATTENUATOR .....................................................................................................................11
www.D5a.t5aSheBetI4TUE.cRoRmOR-RATE TESTER (BERT) FEATURES ...............................................................................12
5.6 CLOCK ADAPTER...........................................................................................................................12
5.7 PARALLEL MICROPROCESSOR INTERFACE FEATURES.....................................................................12
5.8 SPI SERIAL MICROPROCESSOR INTERFACE FEATURES ..................................................................12
5.9 MISCELLANEOUS FEATURES ..........................................................................................................12
5.10 TEST FEATURES............................................................................................................................12
5.11 LOOPBACK FEATURES ...................................................................................................................12
6. CONTROL INTERFACE MODES......................................................................................13
7. PIN DESCRIPTIONS .........................................................................................................14
7.1 SHORT PIN DESCRIPTIONS ............................................................................................................14
7.2 DETAILED PIN DESCRIPTIONS ........................................................................................................17
8. FUNCTIONAL DESCRIPTION ..........................................................................................24
8.1 LIU MODE ....................................................................................................................................24
8.2 TRANSMITTER ...............................................................................................................................24
8.2.1 Transmit Clock .................................................................................................................................... 24
8.2.2 Framer Interface Format and the B3ZS/HDB3 Encoder..................................................................... 24
8.2.3 Error Insertion ..................................................................................................................................... 24
8.2.4 AIS Generation.................................................................................................................................... 25
8.2.5 Waveshaping ...................................................................................................................................... 25
8.2.6 Line Build-Out ..................................................................................................................................... 25
8.2.7 Line Driver........................................................................................................................................... 25
8.2.8 Interfacing to the Line ......................................................................................................................... 25
8.2.9 Driver Monitor and Output Failure Detection ...................................................................................... 26
8.2.10 Power-Down........................................................................................................................................ 26
8.2.11 Jitter Generation (Intrinsic).................................................................................................................. 26
8.2.12 Jitter Transfer ...................................................................................................................................... 26
8.3 RECEIVER .....................................................................................................................................30
8.3.1 Interfacing to the Line ......................................................................................................................... 30
8.3.2 Optional Preamp ................................................................................................................................. 30
8.3.3 Automatic Gain Control (AGC) and Adaptive Equalizer ..................................................................... 30
8.3.4 Clock and Data Recovery (CDR) ........................................................................................................ 31
8.3.5 Loss-of-Signal (LOS) Detector............................................................................................................ 31
8.3.6 Framer Interface Format and the B3ZS/HDB3 Decoder .................................................................... 32
8.3.7 Power-Down........................................................................................................................................ 33
8.3.8 Input Failure Detection........................................................................................................................ 33
8.3.9 Jitter and Wander Tolerance............................................................................................................... 34
8.3.10 Jitter Transfer ...................................................................................................................................... 35
8.4 JITTER ATTENUATOR .....................................................................................................................35
8.5 BERT...........................................................................................................................................36
2 of 130


Part Number DS32512
Description 6-/8-/12-Port DS3/E3/STS-1 LIU
Maker Maxim Integrated Products
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DS32512 Datasheet PDF






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