SY88343DL Datasheet | Micrel Semiconductor

Description The SY88343DL low-power, high-sensitivity, limiting, post amplifier is designed for use in fiber-optic receivers. The device connects 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 SY88343DL quantizes these signals and outputs CML level waveforms. The SY88343DL operates from a single +3.3V power supply, over temperatures ranging from - 40o C to +85o C. With its wide bandwidth, high gain, and signals with data rates up to 3.2Gbps and as small as 5m VPP can be amplified to drive devices with CML inputs or ACcoupled CML/PECL inputs. The SY88343DL generates a high-gain loss-of-signal (LOS) open-collector TTL output. This function has a high-gain input stage for increased LOS sensitivity. 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 set 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, 3.5d B LOS hysteresis is provided to prevent chattering. All support documentation can be found on Micrel’s web site at: .micrel.. Features - Single 3.3V power supply - 155Mbps to 3.2Gbps operation - Low-noise CML data outputs - High-gain LOS - Chatter-free open-collector TTL Loss-of-Signal (LOS) output with internal 4.75kΩ pull-up resistor - TTL /EN input - Programmable LOS level set (LOSLVL) - Ideal for mutil-rate applications - Available in a tiny (3mm x 3mm) 16-pin QFN package Applications - APON, BPON, EPON, GEPON, and GPON - 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 Markets - FTTP - Optical transceivers - Data/Tele - Low-gain TIA interface - Long...