LXT384LE

Product Summary

The LXT384LE is an octal short haul Pulse Code Modulation (PCM) Line Interface Unit for use in both 1.544 Mbps (T1) and 2.048 Mbps(E1) applications. It incorporates eight independent receivers and eight independent transmitters in a single 144 pin LQFP or 160 ball PBGA package. The LXT384LE transmits shaped waveforms meeting G.703 and T1.102 specifications. The transmit drivers provide low impedance independent of the transmit pattern and supply voltage variations. The LXT384LE exceeds the latest transmit return loss specifications, such as ETSI ETS-300166. All transmitters include a power down mode with fast output tristate capability. The LXT384LE can be configured as a 7 channel transceiver with G.772 compliant non intrusive protected monitoring points. The LXT384LE includes Hitless Protection Switching (HPS) feature which helps increase quality of service and eliminates relays in redundancy and 1+1 protection applications. Fast tristate-able drivers and a constant delay jitter attenuator are critical to achieving HPS.

Parametrics

LXT384LE absolute maixmum ratings: (1)DC supply voltage Vcc0, Vcc1, Vccio0, Vccio1: -0.5 to 4.0 V; (2)DC supply voltage Tvcc 0-7: -0.5 to 7.0 V; (3)Input voltage on any digital pin Vin: GND-0.5 to 5.5 V; (4)Input voltage on RTIP, RRING Vin: GND-0.5 to VCC0 + 0.5 V; (5)ESD voltage on any Pin 2 Vin: 2000V; (6)Transient latch-up current on any pin Iin: 100 mA; (7)Input current on any digital pin 3 Iin: -10 to 10 mA; (8)DC input current on TTIP, TRING: ±100 mA; (9)DC input current on RTIP, RRING: ±100 mA; (10)Storage temperature Tstor: -65 +150 ℃; (11)Maximum power dissipation in package PP: 1.6 W; (12)Case Temperature, 144 pin LQFP package Tcase: 120 ℃; (13)Case Temperature, 160 pin PBGA package Tcase: 120 ℃.

Features

LXT384LE features: (1)Single rail 3.3V supply with 5V tolerant inputs; (2)Low power consumption of 130mW per channel (typ.); (3)Hitless Protection Switching (HPS) for 1 to 1 protection without relays; (4)Transmit return loss exceeds ETSI ETS 300166; (5)HDB3, B8ZS, or AMI line encoder/decoder; (6)Provides protected monitoring points per ITU G.772; (7)Analog/digital and remote loopback testing functions; (8)LOS per ITU G.775, ETS 300 233 and T1.231; (9)8 bit parallel or 4 wire serial control interface; (10)Hardware and Software control modes; (11)JTAG Boundary Scan test port per IEEE 1149.1; (12)144 pin LQFP and 160 ball PBGA packages.

Diagrams