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XRT56L85 Datasheet(PDF) 1 Page - Exar Corporation

Part # XRT56L85
Description  Low Power PCM Line Interface
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT56L85 Datasheet(HTML) 1 Page - Exar Corporation

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XRT56L85
Low Power
PCM Line Interface
Rev. 2.11
E
2000
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017
1
October 2000-1
FEATURES
D
Low Power (Typical 14mA)
D
Single +5V Supply
D
Up to 2.048 Mbps Operation in Both TX and RX
Directions
D
Receiver Input can be:
Balanced Transformer Coupled
Capacitively (Twisted Pair)
Single Coaxial Capacitive Coupling
APPLICATIONS
D
T1 and CEPT Interfaces
D
CPI
D
DMI
GENERAL DESCRIPTION
The XRT56L85 is a PCM line interface chip. It consists of
both transmit and receive circuitry in a DIL 18 pin
package. The maximum bit rate the chip can handle is
2.048 Mbps and the signal level to the received can be
attenuated by 10dB of cable loss at half the bit rate. Total
current consumption is between 12-16mA at +5V.
ORDERING INFORMATION
Part No.
Package
Operating
Temperature Range
XRT56L85P
18 Lead 300 Mil PDIP
-40°°°°C to +85°°°°C
XRT56L85D
18 Lead 300 Mil JEDEC SOIC
-40°°°°C to +85°°°°C
BLOCK DIAGRAM
5
14
12
16
17
18
9
3
2
11
8
4
10
6
15
13
1
PDC
Positive
Threshold
Comparator
Negative
Threshold
Comparator
Peak
Detector
TTL Buffer
TTL Buffer
TTL Buffer
TTL Buffer
TTL Buffer
Bias
Bias
RPOS
RCLK
TE
RNEG
TANK BIAS
BIAS
TXDATA+
TXDATA-
RXDATA+
RXDATA-
RXVCC
RXGND
TXVCC
TPOS
TCLK
TNEG
TXGND
Figure 1. Block Diagram
+
+
7


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