Allentown, Pa. - Three time-slot interchanger chips from Agere Systems can switch more traffic and support higher data rates than the company's current devices. The Excerra-8, -16 and -144 target high-density metropolitan access switches and carrier-class voice-over-Internet-protocol (VoIP) gateways.
The Excerra-8 offers twice the switching capacity of Agere's previously largest device. The Excerra-16 has 4x more capacity and the Excerra-144 can be configured to deliver from 4x to 36x more capacity. All three switch traffic via full-duplex, serial, time-division multiplexed (TDM) highway interfaces. They feature independently programmable concentration highway interface (CHI) data rates ranging from 2.048 Mbits/s, or 32 time slots, to 16.384 Mbits/s or 256 time slots, double the upper limit of Agere's previous time-slot interchanger chips.
The Excerra-144 also includes serial links that operate at 622.08 Mbits/s for designers who want to transmit data at higher rates or interconnect chips more efficiently to expand switching fabrics.
The Excerra-8 is packaged in a 240-lead plastic ball-grid array, multiple metal layers, 1-mm ball pitch (PBGAM1), the Excerra-16 comes in a 324-lead PBGAM1 and the Excerra-144 in a 388-lead PBGAM1. Samples should be ready in December and production quantities in March. In 5,000-unit quantities, the Excerra-8 is priced at $76, the Excerra-16 at $95 and the Excerra-144 at $195.
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EETInfo No. 605