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LXT361, LXT361LE, LXT361LE A2

Table of contents:
Info of LXT361
Info of LXT361LE
Info of LXT361LE A2

LXT361, LXT361LE, LXT361LE A2 Selling Leads, Datasheet

MFG:LXT Package Cooled:DIP D/C:02+

LXT361, LXT361LE, LXT361LE A2 Datasheet download

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Part Number: LXT361

MFG: LXT

Package Cooled: DIP

D/C: 02+

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LXT361 General Description

The LXT361 is a fully integrated, PCM transceiver for Long- or Short-Hual, 1.544 Mbps (T1) or 2.048 Mbps (E1) applications allowing full-duplex transmission of digital data over existing twisted-pair installations. The device interfaces with two twisted-pair lines (one pair each for transmit and receive) through standard pulse transformers and appropriate resistors.

The figure on the front page of this data sheet shows a block diagram of the LXT361. Control of the chip is via the 8-bit parallel microprocessor port. Stand-alone operation is not supported.

The LXT361 provides a high-precision, crystal-less Jitter Attenuator (JA). The user may place the JA in the transmit or receive path, or bypass it completely.

The transceiver meets or exceeds FCC, ANSI, and AT&T specifications for CSU and DSX-1 applications, as well as ITU and ETSI requirements for E1 ISDN PRI applications.

LXT361 Maximum Ratings

Parameter	Sym	Min	Max	Unit
DC supply (reference to GND)	V_CC, T_VCC	-	6.0	V
Input voltage, any pin ¹	V_IN	GND - 0.3 V	V_CC + 0.3 V	V
Input current, any pin ²	I_IN	-10	10	mA
Storage Temperature	T_STG	-65	150	° C
Caution: Exceeding these values may cause permanent damage. Caution: Functional operation under these conditions is not implied. Caution: Exposure to maximum rating conditions for extended periods may affect device reliability. 1. TVCC and VCC must not differ by more than 0.3 V during operation. TGND and GND must not differ by more than 0.3 V during operation. 2. Transient currents of up to 100 mA will not cause SCR latch-up. TTIP, TRING, TVCC, and TGND can withstand continuous currents of up to 100 mA.

LXT361 Features

Fully integrated transceiver for Long or Short-Haul T1, or E1 interfaces
Crystal-less digital jitter attenuation
    -Select either transmit or receive path
    -No crystal or high speed external clock required
Meets or exceeds specifications in ANSI T1.102, T1.403 and T1.408; ITU I.431, G.703, G.736, G.775
    and G.823;    ETSI 300- 166 and 300-233; and AT&T Pub 62411
Supports 75 (E1 coax), 100 (T1 twisted-pair) and 120 (E1 twisted-pair) applications
Selectable receiver sensitivity fully restores the received signal after transmission through a cable with
    attenuation of either 0 to 26 dB, or 0 to 36 dB @ 772 kHz and 0 to 43 dB @ 1024 kHz
Five Pulse Equalization Settings for T1 Short-Haul applications
T1/E1 LAN/WAN bridge/routers
T1/E1 Mux; Channel Banks
Digital Loop Carrier - Subscriber Carrier Systems
Four Line Build-Outs for T1 Long-Haul applications from 0 dB to -22.5 dB
Transmit/receive performance monitors with Driver Fail Monitor Open and Loss Of Signal (lOS) outputs
Selectable unipolar or bipolar data I/O and B8ZS/HDB3 encoding/decoding
Line attenuation indication output in 2.9 dB steps
QRSS generator/detector for testing or monitoring
Output short circuit current limit protection
Local, remote, and analog loopback, plus in-band network loopback code generation and detection
Intel/Motorola compatible 8-bit parallel interface for microprocessor control
Available in 28-pin PLCC, 44-pin PQFP and 44-pin LQFP packages

LXT361 Typical Application

ISDN PRI
CSU/NTU interface to T1/E1 Service
Wireless Base Station interface

LXT361 Connection Diagram

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