Wave Issue 2003 1/19/00 Article 4-02

***Oki Semiconductor Announces Three Second Generation GaAs
Devices
(January 18)

Oki Semiconductor announced three additions to its high-speed
gallium arsenide (GaAs) product family. Oki's GaAs devices
include a limiting amplifier, 16:1 multiplexer (mux) and a 1:16
demultiplexer (demux), which are designed for both receiver and
transmitter applications at optical carrier rates of 10 Gbps (OC-
192). These low power consumption components are designed to
support the demand for bandwidth and are ideal for use in long-
and short-haul optical communications networks.

Oki's second generation limiting amplifier, a 2V device, reduces
total power consumption by as much as one half compared to other
devices. Oki's 16:1 mux and 1:16 demux operate at a maximum speed
of 12.5 GHz. They are designed to transfer data to and from lower
frequencies by synchronously merging 16 bit parallel data
streams. These lower-frequency data streams can then be
reconstructed into their original data formats and distributed
using conventional networks.

Oki's 16:1 multiplexer and demultiplexer are manufactured using
Oki's 0.2mm gate length GaAs MESFET process. By using Oki's flip-
flops, which are MCFF (Memory Cell type Flip Flop) and Direct
Coupled FET Logic (DCFL), high-speed operation and low power
dissipation are realized. Capacitive coupling is available for
clock input connection and data output connections. Low speed
signal interfaces are emitter-coupled-logic (ECL) compatible for
easy multi-product interfacing. These devices are mounted in 48
pin packages.

Oki's 2V limiting amplifier offers power dissipation of 0.25W.
The high-speed and low power dissipation results from using
Direct Coupled FET Logic (DCFL). Capacitive coupling is
recommended for input and output signal interfaces.

Other features include:
-- High Speed Operation - maximum bit rate greater than 10Gb/s
-- High Sensitivity - 50 600m Vpp
-- Low Power - 250mW (at power supply voltage 2V)

Samples and production volumes of the limiting amp, 16:1
multiplexer and 1:16 demultiplexer are available now. For small
volumes, each device is priced under $2,000.

www.okisemi.com