MICROCHIP SY88303BLEY

The SY88303BL low-power limiting post amplifiers are designed for use in fiber-optic receivers. These devices connect to typical transimpedance amplifiers (TIAs). The linear signal output from TIAs can contain significant amounts of noise and may vary in amplitude over time. The SY88303BL quantizes these signals and output CML-level waveforms. The SY88303BL operates from a single +3.3V power supply, over temperatures ranging from -40°C to +85°C. With their wide bandwidth and high gain, signals with data rates up to 3.2Gbps, and as small as 10mVPP, can be amplified to drive devices with CML/PECL inputs. The device generates a loss-of-signal (LOS) opencollector TTL output. The LOS function is optimized to detect a wide input range. A programmable loss-of-signal level-set pin (LOSLVL) sets the sensitivity of the input amplitude detection. LOS asserts high if the input amplitude falls below the threshold sets by LOSLVL and de-asserts low otherwise. The enable bar input (/EN) de-asserts the true output signal without removing the input signal. The LOS output can be fed back to the /EN input to maintain output stability under a loss-of-signal condition. Typically, 3.5dB LOS hysteresis is provided to prevent chattering.

• Loss-of-signal detection circuit optimized to detect a wide input range
• Chatter-free Open-Collector TTL Loss-of-Signal (LOS) output
• Single 3.3V power supply
• 155Mbps to 3.2Gbps operation
• Low-noise CML data outputs
• Programmable LOS level set (LOSLVL)
• Available in a tiny 10-pin EPAD-MSOP and 16-pin QFN package

• PON
• Gigabit Ethernet
• 1X and 2X Fibre Channel
• SONET/SDH: OC 3/12/24/48 – STM 1/4/8/16
• High-gain line driver and line receiver