Cicada Semiconductor Inc., a leading provider of silicon solutions for broadband communications, released today the world's first digital signal processing (DSP) based transceiver line interface unit (LIU) for E3, DS3, and STS-1 applications. The new device, the CIS7501, offers the most robust performance available in a single chip transceiver, providing industry leading noise immunity and exceeding all relevant input jitter tolerance and pulse template standards. The low power device operates from a single 3.3V power supply voltage. Samples are available now.

"The introduction of the CIS7501 marks a significant milestone in Cicada's continuing focus on applying breakthrough digital signal processing and mixed-signal techniques to enable next generation communication systems design," said Nick van Bavel, Cicada Semiconductor's President and CEO. "By using DSP techniques, we are able to offer the most robust transceiver in the industry, with 10dB higher noise immunity performance and 50% greater reach than competitive analog-based solutions."

The previous part from this stable -- the CIS7500 receiver only -- is now sampling to potential customers, but this is the part that the industry really wants. The part is totally transparent to the framing format and the architecture of the receiver gives the part about 10 dB level margin over other single chip solutions.

Adding the transmit functionality to the part includes adding a B3ZS/HDB3 encoder, clock driven pulse shaping, an output (adjustable) driver and monitoring. The single 3.3-V supply draws 125 mA. The receive transformer required should have a 1:1 turns ratio, with the transmit transformer 2:1 (chip:line) and a line pair should support up to 1350 ft of RG-59 coax cable.