XRT75L03 datasheet(4/92 Pages) EXAR | THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR

4 / 92 page

XRT75L03

REV. 1.0.4

THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR

TABLE OF CONTENTS

GENERAL DESCRIPTION ............................................................................................... 1

FEATURES .................................................................................................................................................... 1

APPLICATIONS .............................................................................................................................................. 1

TRANSMIT INTERFACE CHARACTERISTICS ...................................................................................................... 2

RECEIVE INTERFACE CHARACTERISTICS ........................................................................................................ 2

Figure 1. Block Diagram of the XRT 75L03 ...................................................................................................... 2

Figure 2. Pin Out of the XRT75L03 ................................................................................................................... 3

ORDERING INFORMATION ................................................................................................................... 3

TABLE OF CONTENTS .................................................................................................................................... I

PIN DESCRIPTIONS (BY FUNCTION) ............................................................................. 4

SYSTEM-SIDE TRANSMIT INPUT AND TRANSMIT CONTROL PINS ...................................................................... 4

TRANSMIT LINE SIDE PINS ............................................................................................................................ 8

SYSTEM-SIDE RECEIVE OUTPUT AND RECEIVE CONTROL PINS .................................................................... 10

RECEIVE LINE SIDE PINS ............................................................................................................................ 17

CLOCK INTERFACE ...................................................................................................................................... 18

GENERAL CONTROL PINS ........................................................................................................................... 19

CONTROL AND ALARM INTERFACE ............................................................................................................... 21

JITTER ATTENUATOR INTERFACE ................................................................................................................. 21

POWER SUPPLY AND GROUND PINS ............................................................................................................ 24

XRT75L03 PIN LISTING IN NUMERICAL ORDER ........................................................................................... 26

1.0 ELECTRICAL CHARACTERISTICS ................................................................................................. 31

TABLE 1: ABSOLUTE MAXIMUM RATINGS ............................................................................................................ 31

TABLE 2: DC ELECTRICAL CHARACTERISTICS: ................................................................................................... 31

2.0 TIMING CHARACTERISTICS ............................................................................................................ 32

Figure 3. Typical interface between terminal equipment and the XRT75L03 (dual-rail data) ......................... 32

Figure 4. Transmitter Terminal Input Timing ................................................................................................... 32

Figure 5. Receiver Data output and code violation timing .............................................................................. 33

Figure 6. Transmit Pulse Amplitude test circuit for E3, DS3 and STS-1 Rates ............................................... 33

3.0 LINE SIDE CHARACTERISTICS: ..................................................................................................... 34

3.1 E3 LINE SIDE PARAMETERS: ............................................................................................................................. 34

Figure 7. Pulse Mask for E3 (34.368 mbits/s) interface as per itu-t G.703 ..................................................... 34

TABLE 3: E3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS ........................... 35

Figure 8. Bellcore GR-253 CORE Transmit Output Pulse Template for SONET STS-1 Applications ............ 36

TABLE 4: STS-1 PULSE MASK EQUATIONS ........................................................................................................ 36

TABLE 5: STS-1 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-253) . 37

Figure 9. Transmit Ouput Pulse Template for DS3 as per Bellcore GR-499 .................................................. 37

TABLE 6: DS3 PULSE MASK EQUATIONS ........................................................................................................... 38

TABLE 7: DS3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-499) ..... 38

Figure 10. Microprocessor Serial Interface Structure ...................................................................................... 39

Figure 11. Timing Diagram for the Microprocessor Serial Interface ................................................................ 39

TABLE 8: MICROPROCESSOR SERIAL INTERFACE TIMINGS ( TA = 250C, VDD=3.3V± 5% AND LOAD = 10PF) ..... 39

FUNCTIONAL DESCRIPTION: ........................................................................................ 41

4.0 The Transmitter Section: ................................................................................................................. 41

Figure 12. Single-Rail or NRZ Data Format (Encoder and Decoder are Enabled) ......................................... 41

Figure 13. Dual-Rail Data Format (encoder and decoder are disabled) ......................................................... 41

4.1 TRANSMIT CLOCK: ........................................................................................................................................... 42

4.2 B3ZS/HDB3 ENCODER: .................................................................................................................................. 42

4.2.1 B3ZS Encoding: ................................................................................................................................. 42

4.2.2 HDB3 Encoding: ................................................................................................................................. 42

Figure 14. B3ZS Encoding Format ................................................................................................................. 42

Figure 15. HDB3 Encoding Format ................................................................................................................. 42

4.3 TRANSMIT PULSE SHAPER: .............................................................................................................................. 43

4.3.1 Guidelines for using Transmit Build Out Circuit: ............................................................................ 43

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