SY88289AL Datasheet | Micrel Semiconductor

3.3V, 3.2Gbps CML Low-Power Limiting Post Amplifier with TTL Loss-of-Signal General Description Features The SY88289AL low-power limiting post amplifier is - Single 3.3V power supply designed for use in fiber-optic receivers. The device - 125Mbps to 3.2Gbps operation connects to typical transimpedance amplifiers (TIAs). - Low-noise CML data outputs The linear signal output from TIAs can contain - Chatter-free open-collector TTL Loss-of-signal (LOS) significant amounts of noise and may vary in amplitude output with internal 4.75kΩ pull-up resistor over time. The SY88289AL quantizes these signals and - TTL /EN input outputs CML-level waveforms. - Internal 50Ω input termination The SY88289AL operates from a single +3.3V power supply, over temperatures ranging from - 40o C to +85o C. - Programmable LOS level set (LOSLVL) With its wide bandwidth and high gain, signals with data - Ideal for multi-rate applications rates up to 3.2Gbps, and as small as 10m VP-P, can be - Available in a tiny 3mmx3mm 16-pin MLF® package amplified to drive devices with CML inputs or ACcoupled CML/PECL inputs. Applications The SY88289AL generates a loss-of-signal (LOS) open- APON, BPON, EPON, GEPON, and GPON collector TTL output. A programmable loss-of-signal - Gigabit Ethernet level-set pin (LOSLVL) sets the sensitivity of the input - Fibre Channel amplitude detection. LOS asserts high if the input - SONET/SDH:OC-3/12/24/48 - STM 1/4/8/16 amplitude falls below the threshold set by LOSLVL and .. de-asserts low otherwise. The enable bar input (/EN) - High-gain line driver and line receiver de-asserts the true output signal without removing the Markets input signal. The LOS output can be fed back to the /EN input to maintain output stability under a loss-of-signal - Optical transceivers condition. Typically, 3.5d B LOS hysteresis is provided to - Data/tele prevent chattering. All support documentation can be found on Micrel’s web site at .micrel.. Typical...