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LXT318PE Datasheet

  • LXT318PE

  • PCM TRANSCEIVER|SINGLE|CEPT PCM-30/E-1|CMOS|LDCC|28PIN|PLAST...

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LXT318
E1 NTU/ISDN PRI Transceiver
Datasheet
The LXT318 is the first fully integrated transceiver for E1 Network Termination Unit (NTU) and
ISDN Primary Rate Interface (ISDN PRI) applications at 2.048 Mbps. The transceiver operates
from 0.0 km to 2.6 km of 0.6 mm (22
AWG
) twisted-pair cable with no external components.
The LXT318 offers selectable HDB3 encoding/decoding, and unipolar or bipolar data I/O. The
LXT318 also provides jitter attenuation in either the transmit or receive direction starting at 3
Hz, and incorporates a serial interface (SIO) for microprocessor control.
The LXT318 offers a variety of diagnostic features including loopbacks and loss of signal
monitoring. It is built using an advanced double-poly, double-metal CMOS process and requires
only a single 5-volt power supply.
Applications
s
s
s
s
PCM 30/ISDN PRI Interface (ITU G.703,
I.431)
NTU (interface to E1 Service)
E1 Mux or LAN bridge - Campus
Networking
Wireless Base Stations/Networking
s
s
s
s
CPU to CPU Channel Extenders
Digital Loop Carrier 鈥?Subscriber Carrier
Systems
Channel Banks
HDSL - E1 Extension
Product Features
s
s
s
s
s
s
s
Fully integrated transceiver comprising:
on-chip equalizer; timing recovery/control;
data processor; receiver; transmitter and
digital control
Pin compatible with the LXT310 T1 CSU/
ISDN PRI (1.544 Mbps) transceiver
Meets or exceeds latest ITU specifications
including G.703, G.736, G.823, and I.431
Meets ETSI 300011 and 300233 standards
Jitter attenuation starting at 3 Hz,
switchable to transmit or receive path
Exceeds ETSI TBR12/13 jitter transfer
performance specifications
Fully restores the received signal after
transmission via a cable with attenuation of
43 dB @ 1024 kHz
s
s
s
s
s
s
s
s
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Selectable Unipolar or Bipolar data I/O
Selectable HDB3 encoding/decoding
Output short circuit current limit protection
Meets 50 mA
RMS
short-circuit current
limit
(per OFTEL OTR-001)
On-line idle mode for testing or for
redundant systems
Local and remote loopback functions
Receive monitor with Loss of Signal (LOS)
output
Microprocessor controllable
Available in 28-pin DIP and PLCC
Extended Temperature Range (-40擄 C to
+85擄 C)
As of January 15, 2001, this document replaces the Level One document
LXT318 鈥?E1 NTU/ISDN PRI Transceiver.
Order Number: 249073-001
January 2001

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