Fremont, Calif. Exar Corporation has expanded its T/E solutions portfolio with two 8-channel line interface units (LIUs). The XRT83VSH38 targets T1/E1/J1 applications, while the XRT83VSH28 is aimed at E1-only environments. Both devices are optimized for cost-sensitive applications such as wireless base stations, multi-service provisioning platforms, routers, and add-drop multiplexers.
Both the XRT83VSH38 and XRT83VSH28, on per-channel basis, have power down mode with independent receive and transmit selection, user programmable arbitrary pulse mode, and an on-chip transmit short circuit protection, which protects line drivers from damage. In addition, both devices have a selectable crystal-less digital jitter attenuator with 32-bit or 64-bit FIFO for both the receive and transmit data path.
The XRT83VSH38 supports a single bill of materials for T1/E1/J1 applications, and has selectable RX and TX internal terminations (T1/E1/J1) for 75/120 Ω (ohm), 100Ω and 110Ω lines. In addition, it has a master clock timing generator where only a single T1, E1, or - kHz clock is needed as the master clock. Also, both devices have relay-less board hot swapping, which reduces system downtime during routine maintenance.
Both LIUs support Exar's R(3) Technology. Devices using R(3) Technology are reconfigurable with integrated termination supporting all common T1/E1/J1 line impedances enabling customers to build a simple board and eliminate the need for external relays for 1:1 and 1+1 redundancy applications, said Exar. This feature allows final device configuration to be made just prior to line-card installation.
Both the XRT83VSH38 and XRT83VSH28 devices are available in a 225-ball BGA package and operate at 3.3 V/1.8 V with 5-V tolerant I/Os over the industrial temperature range.
Pricing: The XRT83VSH38 is priced at $16-$17 and the XRT83VSH28 is priced at $13-$14, both in quantities of 1,000.
Availability: Samples of both parts are available now.
Product information: XRT83VSH38 and XRT83VSH28 and Exar T1/E1 products
Exar Corp., 1-510-668-7000, www.exar.com