The LXT384 is an octal 3.3V short-haul Pulse Code Modulation (PCM) transceiver for use in either 1.544 Mbps (T1) or 2.048 Mbps (E1) applications. It incorporates eight receivers and eight transmitters in a single 144-pin LQFP or 160 PBGA package. The LXT384 is the world's first fully integrated octal transceiver incorporating an advanced crystal-less, digital Jitter Attenuator (JA) that meets CTR12/13 and the latest SONET/SDH requirements. You can configure the LXT384 as a seven-channel transceiver with the additional channel configured as a G.772-compliant nonintrusive performance monitor. Cortina also offers "Hitless Protection Switching" (HPS), which incorporates fast tri-stateable drivers and a constant delay jitter attenuator. HPS helps you reduce system cost by eliminating costly mechanical relays and opto-isolators in 1+1 protection and redundancy applications. The switch over time from primary to backup board is less than 1µs — more than 1,000 times faster than mechanical relays — and helps eliminate loss of frame synchronization. A maximum of 1 bit error is generated when HPS is used instead of relays, which can generate more than 6,000 bit errors. Analog and digital JTAG can also help reduce test costs by reducing test times.