Microchip Technology Limiting Post Amplifier Part #SY88343BLEY | IC | DEX

Microchip Technology Limiting Post Amplifier Part #SY88343BLEY

The SY88343BL low-power limiting post amplifier is designed for use in fiber-optic receivers. The device connects to typical transimpedance amplifiers (TIAs) that are AC-coupled. The linear signal output from TIAs can contain significant amounts of noise and may vary in amplitude over time. The SY88343BL quantizes these signals and outputs CML-level waveforms. The SY88343BL operates from a single +3.3V power supply, over temperatures ranging from –40°C to +85°C. With its wide bandwidth and high gain, signals with data rates up to 3.2 Gbps and as small as 5 mVPP can be amplified to drive devices with CML inputs or AC-coupled CML/PECL inputs. The SY88343BL generates a high-gain loss-of-signal (LOS) open-collector TTL output. The LOS function has a high gain input stage for increased 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, 3.5 dB LOS hysteresis is provided to prevent chattering.

Features

• Single 3.3V Power Supply
• DC to 3.2 Gbps Operation
• Low-Noise CML Data Outputs
• High Gain LOS
• Chatter-Free Open-Collector TTL Loss-of-Signal (LOS) Output with Internal 4.75 kΩ Pull-Up Resistor
• TTL /EN Input
• Programmable LOS Level Set (LOSLVL)
• Ideal for Multi-Rate Applications

Applications

• APON, BPON, EPON, and GPON
• Gigabit Ethernet
• Fibre Channel
• OC-3 and OC-12/24 SONET/SDH
• High-Gain Line Driver and Line Receiver

MCH:SY88343BLEY

SY88343BLEY