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Table of Contents
Contents Page Contents Page
2Agere Systems Inc.
Data Sheet
July 2002
T7693 3.3 V T1/E1 Quad Line Interface
T7690 5.0 V T1/E1 Quad Line Interface
1 Features ........................................................................ 1
2 Applications ................................................................... 1
3 Overview ........................................................................ 1
4 Single Channel Block Diagram ...................................... 4
5 Pin Information ............................................................. 5
5.1 System Interface Pin Options ................................. 9
6 Receiver ...................................................................... 11
6.1 Data Recovery ...................................................... 11
6.2 Jitter ...................................................................... 11
6.3 Receiver Configuration Modes ............................. 11
6.3.1 Clock/Data Recov ery Mode (CDR) ............. 11
6.3.2 Zero Substitution Decoding (CODE) ........... 11
6.3.3 Alternate Logic Mode (ALM) ....................... 11
6.3.4 Alternate Clock Mode (ACM) ...................... 11
6.3.5 Loss Shutdown (LOSSD) ............................ 12
6.4 Receiver Alarms ................................................... 12
6.4.1 Analog Loss-of-Signal (ALOS) Alarm .......... 12
6.4.2 Digital Loss-of-Signal (DLOS) Alarm ........... 12
6.4.3 Bipolar Violation (BPV) Alarm ..................... 12
6.5 DS1 Receiver Specifications ................................ 13
6.6 CEPT Receiver Specifications .............................. 14
7 Transmitter .................................................................. 15
7.1 Output Pulse Generation ...................................... 15
7.2 Jitter ...................................................................... 15
7.3 Transmitter Configuration Modes ......................... 16
7.3.1 Zero Substitution
Encoding/Decoding (CODE) ....................... 16
7.3.2 All Ones (AIS, Blue Signal)
Generator (TBS) .......................................... 16
7.4 Transmitter Alarms ............................................... 16
7.4.1 Loss-of-Transmit Clock (LOTC) Alarm ........ 16
7.4.2 Transmit Driver Monitor (TDM) Alarm ......... 16
7.5 DS1 Transmitter Pulse Template
and Specifications ................................................ 16
7.6 CEPT Transmitter Pulse Template
and Specifications ................................................ 17
8 Jitter Attenuator ........................................................... 19
8.1 Data Delay ............................................................ 19
8.2 Generated (Intrinsic) Jitter .................................... 19
8.3 Jitter Transfer Function ......................................... 19
8.4 Jitter Tolerance ..................................................... 19
8.5 Jitter Attenuator Enable ........................................ 19
8.5.1 Jitter Attenuator Receive
Path Enable (JAR) ...................................... 19
8.5.2 Jitter Attenuator Transmit
Path Enable (JAT) ....................................... 20
8.6 Loopbacks ............................................................ 20
8.6.1 Full Local Loopback (FLLOOP) ................... 20
8.6.2 Remote Loopback (RLOOP) ....................... 20
8.6.3 Digital Local Loopback (DLLOOP) .............. 20
8.7 Other Features ..................................................... 20
8.7.1 Powerdown (PWRDN) ................................ 20
8.7.2 RESET (5(6(7, SWRESET) .......................20
8.8 Loss of XCLK Reference Clock (LOXC) ...............21
8.9 In-Circuit Testing and Driver 3-State (ICT) ............21
9 Microprocessor Interface ..............................................22
9.1 Overview ...............................................................22
9.2 Microprocessor Configuration Modes ...................22
9.3 Microprocessor Interface Pinout Definitions ..........23
9.4 Microprocessor Clock (MPCLK) Specifications .....24
9.5 Internal Chip Select Function ................................24
9.6 Microprocessor Interface Register Architecture ....24
9.6.1 Alarm Register Overview (0000, 0001) ........26
9.6.2 Alarm Mask Register Overview
(0010, 0011) ................................................26
9.6.3 Global Control Register Overview
(0100, 0101) ................................................27
9.6.4 Channel Configuration Register Overview
(0110—1001) ............................................... 27
9.6.5 Other Registers ............................................28
10 Timing Characteri stic s ..... .................... ...... ....... ...... ....29
10.1 I/O Timing ...........................................................29
10.2 Interface Data Timing .........................................34
10.2.1 Logic Interface Characteristics .................35
10.3 XCLK Reference Clock .......................................35
11 Electrical Charac te rist ics ........ ...... .................... ...... ....3 6
11.1 Power Supply Bypassing ....................................36
11.2 Power Specifications ...........................................36
11.3 Absolute Maximum Ratings ................................37
11.4 Handling Precautions ..........................................37
11.5 Operating Conditions ..........................................37
12 External Line Termination Circuitry ............................38
12.1 T7690 .................................................................38
12.2 T7693 .................................................................39
13 Outline Diagram ........ ...... ....... ...... ....... ...... ....... ...... ....4 0
13.1 100-Pin BQFP ....................................................40
Figures Page
Figure 4-1. Block Diagram (Single Channel)......................4
Figure 5-1. Pin Diagram.....................................................5
Figure 7-1. DSX-1 Isolated Pulse Template.....................17
Figure 7-2. ITU-T G.703 Pulse Template.........................17
Figure 10-1. Mode 1—Read Cycle Timing
(MPMODE = 0, MPMUX = 0).......................30
Figure 10-2. Mode 1—Write Cycle Timing
(MPMODE = 0, MPMUX = 0).......................30
Figure 10-3. Mode 2—Read Cycle Timing
(MPMODE = 0, MPMUX = 1).......................31
Figure 10-4. Mode 2—Write Cycle Timing
(MPMODE = 0, MPMUX = 1).......................31
Figure 10-5. Mode 3—Read Cycle Timing
(MPMODE = 1, MPMUX = 0).......................32