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Número de pieza | XRT56L22 | |
Descripción | Low Power Repeater/Receiver | |
Fabricantes | Exar Corporation | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de XRT56L22 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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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 |
Páginas | Total 16 Páginas | |
PDF Descargar | [ Datasheet XRT56L22.PDF ] |
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