PDF XR-T56L22AN Data sheet ( Hoja de datos )

Número de pieza	XR-T56L22AN
Descripción	Low Power Repeater/Receiver
Fabricantes	Exar Corporation
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No Preview Available ! ...the analog plus companyTM XR-T56L22 Low Power Repeater/Receiver FEATURES D Contains All The Active Components For A PCM Repeater Or Long Haul Line Receiver D Low Voltage Operation (5.1V) D Low Power Consumption (8.75mA Max) D 2Mbps Operation Capability D Dual Matched ALBO Ports D Internal Adjustable Phase Shift Circuitry D Extracted Clock Output D Internal Shunt Regulator D Temperature Independent Current Biasing APPLICATIONS June 1997-3 D T1 PCM Repeater/Receiver D T148C PCM Repeater/Receiver D European 2.048Mbps PCM Repeater/Receiver D Digital Multiplexers, CSUs, Switching Equipment D ISDN Compatible Equipment: Fax Machines, Computers etc. GENERAL DESCRIPTION The XR-T56L22 is a very low power monolithic repeater/ receiver IC designed for PCM carrier systems operating between 1.544Mbps and 2.37Mbps. The IC provides all the active circuitry required to implement one side of a PCM repeater. The XR-T56L22 features on-chip adjustable phase shifting, an extracted clock output and an on-board shunt regulator. The very low power consumption of the device makes it ideal for long haul “tandem” repeater applications. ORDERING INFORMATION Part No. XR-T56L22AP XR-T56L22AN XR-T56L22AD Package 18 Lead 300 Mil PDIP 18 Lead 300 Mil CDIP 18 Lead 300 Mil Jedec SOIC Operating Temperature Range -40°C to +85°C -40°C to +85°C -40°C to +85°C Rev. 1.02 E1997 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017 1 1 page XR-T56L22 ELECTRICAL CHARACTERISTICS (CON’T) Parameter Threshold Voltages ALBO Threshold +Ve ALBO Threshold -Ve ALBO Threshold Difference Clock Drive on Current + Ve Clock Drive on Current -Ve Clock Drive Difference Clock Threshold +Ve Clock Threshold -Ve Clock Threshold Difference Data Threshold +Ve Data Threshold -Ve Data Threshold Difference Pin Min. Typ. Max. Unit Conditions 7, 6 1.4 7, 6 1.4 -3 80 80 -3 7, 6 69 7, 6 69 -3 7, 6 41 7, 6 41 -3 1.6 V 1, 2 1.6 V 1, 2 3 %3 140 mA 4 140 mA 4 3 %3 79 % 5 79 % 5 3 %3 50 % 3 50 % 5 3 %3 Data Output Stages Output Pulse Rise Time + Ve (Tr) Output Pulse Rise -Time-Ve(Tr) Output Pulse Fall Time+Ve(Tf) Output Pulse Fall Time -Ve (Tf) 9 10 9 10 40 nS 10%-90%6 40 nS 10%-90%6 40 nS 10%-90%6 40 nS 10%-90%6 Output Pulse Width +Ve (Tw) 9 224 264 nS at 50% Output Pulse Width -Ve (Tw) Output Pulse Width Difference (dTw) Output Voltage (low) (VOL) Output Voltage Difference (VOL) 10 9, 10 9, 10 224 -12 0.6 -0.15 264 12 0.95 0.15 nS at 50% nS at 50% V6 V6 Notes 1 Pk/pk voltage at Pins 6 and 7 of a 1MHz sine wave derived through amplifier and measured differentially. 2 Pk/pk voltage at Pins 6 and 7 adjusted for a current increase of 2mA at pin 1. 3 Calculation only: percentage difference = [higher value/lower value]-1 x 100%. 4 V6 - V7 adjusted to ALBO threshold voltage (Pin 16 = 3.6V) 5 Figure taken as a percentage of ALBO threshold. 6 Using a 130W pull up resistor between 9, 10 and VCC and 15pF capacitance to GND. Specifications are subject to change without notice Rev. 1.02 5 5 Page Figure 9. XR–T56L22 T1 Evaluation Circuit 11 Page

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