XRT59L91ID EXAR [Exar Corporation], XRT59L91ID Datasheet
XRT59L91ID
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XRT59L91ID Summary of contents
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... CMOS level signals. ORDERING INFORMATION Part No. XRT59L91ID Rev. P2.00 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 · (510) 668-7000 · FAX (510) 668-7017 Supports both Local- and Remote-Loop back Operations Logic Inputs accept either 3 ...
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XRT59L91 RTIP Recei Receive Equaliz ve Equalizer RRing er Loca Local Loop l Loop Back LLoop Back TTIP TRing Figure 1. XRT59L91 Block Diagram Rev. P2.00 Preliminary RxLO S Peak Detector/ Peak ...
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PIN CONFIGURATION PIN DESCRIPTION Pin# Symbol Type 1 TxClk ...
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XRT59L91 PIN DESCRIPTION Pin# Symbol Type 3 TxNEG I 4 LLoop I 5 RLoop I Rev. P2.00 Preliminary Description Transmit – Negative Data Input: The exact signal that should be applied to this input pin depends upon whether the user ...
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PIN DESCRIPTION Pin# Symbol Type 6 RxPOS O 7 RxNEG O 8 RxLOS O 9 RTIP I 10 RRing I 11 RVSS - 12 RVDD - 13 TTIP O 14 TVDD - 15 TRing O 16 TVSS - Rev. P2.00 ...
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XRT59L91 AC ELECTRICAL CHARACTERISTICS 25°C Unless otherwise specified Parameter TClk Clock Period TClk Duty Cycle Transmit Data Setup Time Transmit Data Hold Time Transmit Data Prop. Delay Time - RZ data Mode - NRZ data Mode ...
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RECEIVER ELECTRICAL CHARACTERISTICS T =-40 to 85°C, V =3.3V±5%, unless otherwise specified Parameter Receiver Loss of Signal: Threshold to Assert Threshold to Clear Time Delay Hysteresis Receiver Sensitivity Interference Margin Input Impedance Jitter Tolerance: 20Hz 700Hz 10KHz —100KHz ...
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XRT59L91 SYSTEM DESCRIPTION The XRT59L91 device is a single channel E1 trans- ceiver that provides an electrical interface for 2.048Mbps applications. XRT59L91 includes a receive circuit that converts an ITU-T G.703 compliant bipolar signal into a TTL compatible logic levels. ...
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TxPO S TxNEG TClk Figure 2. Illustration on how the XRT59L91 Device Samples the data on the In general, if the XRT59L91 device samples a “1” on the TxPOS input pin, then the “Transmit Section” of the device will ultimately ...
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XRT59L91 Figure 3, indicates that when the user is operating the XRT59L91 device in the “Clockless” Mode, then the Terminal Equipment must do the following. Not apply a signal on the “TxClk” line. When applying a pulse (to either the ...
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With input signal as described above, the XRT59L91 device will take each mark (which is provided to it via the “Transmit Input Interface” block, and will generate a pulse that complies with the pulse template, presented in Figure 4 (when ...
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XRT59L91 Figure 6. Illustration ...
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Transmit Transformer Recommendations Parameter Turns Ratio Primary Inductance Isolation Voltage Leakage Inductance The Following Transformers Are Recommended For Use: Part Num ber Vendor PE-65835 Pulse TTI 7154-R Transpower Technologies, Inc. TG26-1205 HALO Note: More transformers will be added to this ...
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XRT59L91 2.0 The Receive Section The Receive Section of the XRT59L91 device consists of the following blocks: The “Receive Equalizer” block The “Peak Detector” and “Slicer” block The “LOS Detector” block The “Receive Output Interface” block ...
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XRT59L91 Figure 8. Recommended ...
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XRT59L91 2.2 The “Receive Equalizer” Block After the XRT59L91 device has received the incoming line signal, via the RTIP and RRing input pins, the first block that this signal will pass through is the Receive Equalizer block. As the line ...
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Timing Requirements associated with Declaring and Clearing the LOS Indicator. The XRT59L91 device was designed to meet the ITU- T G.775 specification timing requirements for declar- ing and clearing the LOS indicator. In particular, the XRT59L91 device will declare LOS, ...
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XRT59L91 3.0 Diagnostic Features In order to support diagnostic operations, the XRT59L91 supports the following loopback modes: Local Loopback Remote Loopback Each of these loopback modes will be discussed below. 3.1 The Local Loop-Back Mode When the XRT59L91 device is ...
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The user can configure the XRT59L91 device to oper- ate in the “Local Loop-back” Mode, by pulling the “LLoop” input pin (pin 4) to VDD. 3.2 The Remote Loop Back Mode When the XRT59L91 device is configured to operate in ...
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XRT59L91 4.0 Shutting off the Transmitter The XRT59L91 device permits the user to shut the “Transmit Driver” within the Transmit Section of the chip. This feature can be useful for system redundancy design considerations or during diagnostic testing. The user ...
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APPLICATIONS INFORMATION Figures 16, 17 and 18, provide example schematics on how to interface the XRT59L91 device to the line, under the following conditions: ...
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XRT59L91 xLin ...
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LIn ...
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XRT59L91 ...
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Rev. P2.00 Preliminary 25 XRT59L91 ...
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XRT59L91 Rev. P2.00 Preliminary Notes 26 ...
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Rev. P2.00 Preliminary Notes 27 XRT59L91 ...
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XRT59L91 EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license ...