SLXT334QE.B3 Intel, SLXT334QE.B3 Datasheet
SLXT334QE.B3
Specifications of SLXT334QE.B3
Related parts for SLXT334QE.B3
SLXT334QE.B3 Summary of contents
Page 1
LXT334 Quad Short-Haul Transceiver with Clock Recovery The LXT334 is a quad, short-haul, PCM transceiver for 2.048 MHz or 1.544 MHz transmission systems. Its low impedance transmit output drivers provide constant line impedance whether transmitting marks or spaces. The output ...
Page 2
... Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order. Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling 1-800- 548-4725 or by visiting Intel’s website at http://www.intel.com. ...
Page 3
Contents 1.0 Pin Assignments & Signal Descriptions 2.0 Functional Description 2.1 Receiver ..............................................................................................................11 2.1.1 Loss Of Signal Detector .........................................................................11 2.1.1.1 LOS Detection at 2.048 MHz.....................................................11 2.1.1.2 LOS Detection at 1.544 MHz.....................................................12 2.1.1.3 In-Service Code Violation Monitoring ........................................12 2.2 Transmitter ..........................................................................................................12 ...
Page 4
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Tables 1 LXT334 Pin Descriptions....................................................................................... 7 2 Operating Mode Summary .................................................................................. 14 3 Transformer Selection Guide1 ............................................................................ 19 4 Transmit Transformer and Resistor Combinations ............................................. 20 5 Absolute Maximum Ratings ................................................................................ 22 ...
Page 5
Figure 1. LXT334 Block Diagram Datasheet Quad Short-Haul Transceiver with Clock Recovery — LXT334 5 ...
Page 6
LXT334 — Quad Short-Haul Transceiver with Clock Recovery 1.0 Pin Assignments & Signal Descriptions Figure 2. LXT334 64 Pin Assignments and Markings Package Topside Markings Marking Part # Unique identifier for this product family. Rev # Identifies the particular silicon ...
Page 7
Table 1. LXT334 Pin Descriptions 1 Pin # Sym I/O Master Clock Input. An independent and free-running 2.048 or 1.544 MHz clock input generates the internal reference clocks for all transceivers. On Loss of Signal (LOS), the LXT334 derives RCLKx ...
Page 8
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Table 1. LXT334 Pin Descriptions (Continued) 1 Pin # Sym I/O 14 TGND1 S Transmit Ground–Port 1. Ground return for transmit driver 1. 15 TVCC1 S Transmit Positive Supply–Port 1. +5 VDC ...
Page 9
Table 1. LXT334 Pin Descriptions (Continued) 1 Pin # Sym I/O Control 1/Control 2. Settings CNTL1 CNTL2 Result L 31 CNTL1 CNTL2 TRING2 AO Transmit Ring Output–Port 2. See TRING0, pin 12; TTIP0, ...
Page 10
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Table 1. LXT334 Pin Descriptions (Continued) 1 Pin # Sym I/O Receive Clock Output–Port 3. All RCLKx pins are identical. This pin provides the recovered clock from the signal received at RTIPx ...
Page 11
Functional Description The LXT334 is a fully integrated, quad line interface unit (QLIU) with four complete, independent transceivers. It supports G.703 applications at both 2.048 Mbps and 1.544 Mbps. All transceivers operate at the same frequency, determined by the ...
Page 12
LXT334 — Quad Short-Haul Transceiver with Clock Recovery The receiver monitor loads a digital counter at the RCLK frequency. The monitor increments the counter with each received 0, and resets with each received 1 (mark). Any signal ...
Page 13
The line driver provides a constant low output impedance of < driving marks or spaces. This well-controlled impedance provides excellent return loss when used with external precision resistors (±1% accuracy) in series with the transformer. The Application Information ...
Page 14
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Figure 3. 50% AMI Pulse Form Table 2. Operating Mode Summary MCLK TCLK LOOP clocked clocked Open clocked clocked L clocked clocked H L clocked Open L clocked L L clocked H ...
Page 15
Application Information Figure 4. E1 Low Power Tx I/F for Coax Cables Datasheet Quad Short-Haul Transceiver with Clock Recovery — LXT334 Vcc D1 1.266 : 1 TTIP TRING D4 Vcc International Rectifier: ...
Page 16
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Figure 5. E1 Matched Line Tx I/F for Coax Cables for High Return Loss 16 Vcc 1.185 26.1 TTIP 26.1 TRING D4 Vcc CRT: ...
Page 17
Figure 6. E1 Matched Line Tx I/F for Twisted-Pair Lines for High Return Loss Datasheet Quad Short-Haul Transceiver with Clock Recovery — LXT334 Vcc D1 26 1.5 TTIP 26.1 TRING D4 CRT: See ...
Page 18
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Figure 7. E1 Low Power Tx I/F for Twisted-Pair Lines Figure I/F for Coax Cables Figure I/F for Twisted-Pair Lines Figure 10. T1 Low Power Tx ...
Page 19
... TG29-1205NX 0553-0013 Bel-Fuse 5006- the publication date, Intel, has tested the transformers listed in this table. However, part numbers and specifications change without notice. Design engineers should validate components before committing to their use. Datasheet Quad Short-Haul Transceiver with Clock Recovery — LXT334 ...
Page 20
... Schott Corp 67129300 ST 5078 Valor ST 5170T the publication date, Intel, has tested the transformers listed in this table. However, part numbers and specifications change without notice. Design engineers should validate components before committing to their use. Table 4. Transmit Transformer and Resistor Combinations Transformer Resistor 1 ...
Page 21
Figure 13. E1 120 and 75 OSCILLATOR 2.048 MHz MCLK MCLK TCLK0 TCLK0 TPOS0 TPOS0 TNEG0 TNEG0 RPOS0 RPOS0 RNEG0 RNEG0 RCLK0 RCLK0 TCLK1 TCLK1 TPOS1 TPOS1 TNEG1 TNEG1 RPOS1 RPOS1 RNEG1 RNEG1 RCLK1 RCLK1 TCLK2 ...
Page 22
LXT334 — Quad Short-Haul Transceiver with Clock Recovery 4.0 Test Specifications Note: The minimum and maximum values in represent the performance specifications of the LXT334 and are guaranteed by test except, where noted, by design or other correlation methods. Table ...
Page 23
Table 7. DC Characteristics (over recommended range) (Continued) Parameter Input leakage current (digital input pins) 5 Tristate leakage current E1 Driver short circuit current T1 Low level input voltage High level input voltage MODE input pins Midrange input voltage Low ...
Page 24
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Table 8. 2.048 MHz Transmit Characteristics in Transformer Coupling Mode (over recommended range) (Continued) Parameter 2, 4 Difference between pulse sequences Transmit output jitter 100 kHz Output jitter in ...
Page 25
Table 9. 1.544 MHz Transmit Characteristics (over recommended range) (Continued) Parameter 51 kHz to 102 kHz 4 Transmit return loss 102 kHz to 2.048 MHz 2.048 MHz to 3.072 MHz Transmit load capacitance 1. Typical figures are at 25 °C ...
Page 26
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Table 10. 2.048 MHz Receive Characteristics (over recommended range) (Continued) Parameter 51 kHz–102 kHz 6 Receiver Return loss 102–2048 kHz 2048 kHz–3072 kHz 1. Typical figures are at 25 °C and are ...
Page 27
Table 12. Transmit Timing Characteristics (over recommended range) Parameter E1 Output pulse width T1 E1 Transmit clock frequency T1 Transmit clock tolerance Transmit clock duty cycle TPOS/TNEG duty cycle TPOS/TNEG to TCLK setup time TCLK to TPOS/TNEG hold time 1. ...
Page 28
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Table 13. Receive Timing Characteristics (over recommended range) (Continued) Parameter RPOS/RNEG data low time (MCLK=H) RPOS/RNEG to RCLK rising setup time RCLK rising to RPOS/RNEG hold time Delay time between RPOS/RNEG and ...
Page 29
Figure 16. 2.048 MHz Pulse Mask G.703 Figure 17. 1.544 MHz Pulse Mask, G.703 V 3 1.5 0 -3T/8 -T time slot width Datasheet Quad Short-Haul Transceiver with Clock Recovery — LXT334 0.7 0.7 0.3 1.2 ...
Page 30
LXT334 — Quad Short-Haul Transceiver with Clock Recovery Figure 18. Jitter Tolerance—G.823 1000 UI 100 1 1 LXT334 Jitter Tolerance 3.0 UI ...
Page 31
Figure 19. Jitter Attenuation—G.735 0 dB ITU G.735 Jitter -5 dB Attenuation Requirement -10 dB -15 dB -20 dB -25 dB -30 dB -35 dB -40 dB - 100 Hz Table 14. Relevant Recommendations Recommendation ...
Page 32
LXT334 — Quad Short-Haul Transceiver with Clock Recovery 5.0 Mechanical Specifications Figure 20. Package Specifications • • • Dim ...