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Advance Data Sheet
T7633 Dual T1/E1 3.3 V Short-Haul Terminator
May 1998
2
Lucent Technologies Inc.
Table of Contents
Contents
Page
Features ................................................................................................................................................................... 1
Power Requirements and Package.................................................................................................................... 1
T1/E1 Line Interface Features............................................................................................................................ 1
T1/E1 Framer Features...................................................................................................................................... 1
Facility Data Link Features................................................................................................................................. 1
Microprocessor Interface.................................................................................................................................... 1
Applications........................................................................................................................................................ 1
Feature Descriptions .............................................................................................................................................. 13
T1/E1 Line Interface Features.......................................................................................................................... 13
T1/E1 Framer Features.................................................................................................................................... 13
Facility Data Link Features............................................................................................................................... 14
User-Programmable Microprocessor Interface ................................................................................................ 14
Functional Description............................................................................................................................................ 15
Pin Information ....................................................................................................................................................... 19
Line Interface Unit: Block Diagram......................................................................................................................... 26
Line Interface Unit: Receive ................................................................................................................................... 26
Data Recovery.................................................................................................................................................. 26
Jitter Accommodation and Jitter Transfer Without the Jitter Attenuator........................................................... 27
Receive Line Interface Configuration Modes ................................................................................................... 27
T1/DS1 LIU Receiver Specifications ................................................................................................................ 30
CEPT LIU Receiver Specifications................................................................................................................... 31
Line Interface Unit: Transmit .................................................................................................................................. 34
Output Pulse Generation.................................................................................................................................. 34
LIU Transmitter Configuration Modes .............................................................................................................. 35
LIU Transmitter Alarms .................................................................................................................................... 35
DSX-1 Transmitter Pulse Template and Specifications ................................................................................... 37
CEPT Transmitter Pulse Template and Specifications .................................................................................... 38
Line Interface Unit: Jitter Attenuator....................................................................................................................... 40
Generated (Intrinsic) Jitter................................................................................................................................ 40
Jitter Transfer Function .................................................................................................................................... 40
Jitter Accommodation....................................................................................................................................... 41
Jitter Attenuator Enable (Transmit or Receive Path)........................................................................................ 41
Line Interface Unit: Loopbacks............................................................................................................................... 44
Full Local Loopback (FLLOOP)........................................................................................................................ 44
Remote Loopback (RLOOP) ............................................................................................................................ 44
Digital Local Loopback (DLLOOP) ................................................................................................................... 44
Line Interface Unit: Other Features........................................................................................................................ 45
LIU Powerdown (PWRDN)............................................................................................................................... 45
Loss of Framer Receive Line Clock (LOFRMRLCK Pin).................................................................................. 45
In-Circuit Testing and Driver High-Impedance State (3-STATE)...................................................................... 45
LIU Delay Values.............................................................................................................................................. 45
SYSCK Reference Clock........................................................................................................................................ 46
Line Interface Unit: Line Interface Networks........................................................................................................... 48
LIU-Framer Interface.............................................................................................................................................. 50
LIU-Framer Physical Interface.......................................................................................................................... 50
Interface Mode and Line Encoding................................................................................................................... 52
DS1: Zero Code Suppression (ZCS)................................................................................................................ 53
CEPT: High-Density Bipolar of Order 3 (HDB3)............................................................................................... 54