SY88289HLMG

Special Purpose Amplifiers Overview

The SY88289HLMG is a low-power, high-sensitivity limiting post amplifier designed for fiber-optic receivers. It operates from a single +3.3V power supply over an industrial temperature range of –40°C to +85°C. The device supports data rates up to 3.2Gbps and amplifies input signals as small as 4mVpp to drive CML/PECL inputs. It features a high-gain input stage with programmable loss-of-signal detection via the LOSLVL pin. The component generates a chatter-free open-collector TTL LOS output with an internal 4.75kΩ pull-up resistor. It is housed in a 16-pin QFN package measuring 3mm x 3mm.

Special Purpose Amplifiers Feature Summary

• High input sensitivity capable of detecting signals as small as 4mVpp
• Programmable loss-of-signal level set (LOSLVL) for adjustable amplitude detection thresholds
• Chatter-free open-collector TTL LOS output with integrated pull-up resistor
• I/O compatible with Analog Devices ADN2891

Special Purpose Amplifiers Applications

• PON systems
• SFP/SFF/GBIC optical transceivers
• SONET/SDH applications including OC 3/12/24/48 and STM 1/4/8/16
• 1X and 2X Fibre Channel interfaces
• Line driver and line receiver circuits

Special Purpose Amplifiers Procurement Notes

Verify the specific ordering suffix HLMG corresponds to the QFN-16 package type and industrial operating range when sourcing. Confirm lead finish specifications match NiPdAu Pb-Free requirements. Ensure the supplier documentation explicitly references Micrel or Microchip Technology as the manufacturer. Validate that the part marking indicates '289H' with the appropriate lead-free bar line indicator.

Special Purpose Amplifiers Selection Notes

Select this component for designs requiring high gain and sensitivity in multi-rate optical networks. It is suitable for interfacing directly with AC-coupled transimpedance amplifiers. The device provides stable operation for data rates ranging from 125Mbps to 3.2Gbps. Consider the 16-pin QFN package dimensions for PCB layout constraints. Verify compatibility with existing TIA outputs before integration.

Special Purpose Amplifiers Part Context

This device belongs to the SY88289 family of limiting post amplifiers manufactured by Micrel, now part of Microchip Technology. It is specifically engineered for high-performance optical communication applications where signal integrity and noise rejection are critical. The SY88289HL variant distinguishes itself through enhanced input sensitivity compared to standard models.

Special Purpose Amplifiers Replacement Considerations

The datasheet notes I/O compatibility with the Analog Devices ADN2891.