SY88973VMI

Special Purpose Amplifiers Overview

The SY88973VMI is a low-power limiting post amplifier designed for fiber optic receivers, operating from a single +3.3V ±10% or +5V ±10% power supply within an industrial temperature range of –40°C to +85°C. It supports multi-rate operation up to 3.2Gbps with a typical differential voltage gain of 38dB and a 2GHz -3dB bandwidth. The device features internally terminated 50Ω CML data inputs and outputs that provide a typical 800mVPP output swing. It includes a chatter-free Loss-of-Signal (LOS) open-collector TTL output with internal pull-up and programmable sensitivity via the LOSLVL pin.

Special Purpose Amplifiers Feature Summary

• Multi-rate operation supporting data rates up to 3.2Gbps
• Integrated 50Ω input termination and low-noise CML outputs
• Programmable Loss-of-Signal detection with electrical hysteresis
• Enable input allows feedback from LOS for output stability

Special Purpose Amplifiers Applications

• Fiber optic receivers
• Gigabit Ethernet transceivers
• SONET/SDH systems
• Fibre Channel interfaces
• Small form factor pluggable (SFP) modules

Special Purpose Amplifiers Procurement Notes

Verify the specific ordering suffix MI indicates the MLF-16 package variant when sourcing replacements. Confirm lead-free status requirements against the original specification, as alternative suffixes may denote different termination finishes. Ensure the component meets the required industrial temperature range and power supply specifications for the target application environment.

Special Purpose Amplifiers Selection Notes

Select this component when a limiting post amplifier with integrated input termination and Loss-of-Signal functionality is required. It is suitable for interfacing directly with transimpedance amplifiers in optical networks. Consider the MLF-16 package for space-constrained designs requiring exposed pad thermal management. Verify compatibility with downstream CML or AC-coupled PECL inputs.

Special Purpose Amplifiers Part Context

The SY88973VMI belongs to the SY88973V family of limiting amplifiers manufactured by Microchip Technology. This series is engineered for high-speed signal conditioning in optical communication systems. The device distinguishes itself by combining amplification with signal integrity monitoring through its built-in LOS feature, simplifying receiver design compared to discrete solutions.

Special Purpose Amplifiers Replacement Considerations

SY88973VMG serves as a direct replacement offering identical functionality with a lead-free NiPdAu finish.