SY88403BLEY-TR

Special Purpose Amplifiers Overview

The SY88403BLEY-TR is a low-power limiting post amplifier optimized for copper applications, operating from a single +3.3V ±10% power supply across an industrial temperature range of –40°C to +85°C. It supports multi-rate data transmission up to 4.25Gbps with an input sensitivity as low as 5mVpp. The device features internally terminated 50Ω differential CML data outputs providing typically 800mVpp output swing and 60ps edge rates. It incorporates a TTL open-collector Loss-of-Signal (LOS) output with internal 4.75kΩ pull-up resistor and programmable LOS sensitivity via a single external resistor.

Special Purpose Amplifiers Feature Summary

• Multi-rate operation supporting data rates up to 4.25Gbps
• Chatter-free Loss-of-Signal (LOS) output with programmable sensitivity
• Low noise 50Ω CML data outputs with high gain
• Internal 50Ω data input termination

Special Purpose Amplifiers Applications

• Fibre Channel at 1.062Gbps, 2.125Gbps, and 4.25Gbps
• Cable driver circuits
• Small form factor pluggable (SFP) transceivers
• High-gain line driver and line receiver

Special Purpose Amplifiers Procurement Notes

Verify the specific ordering suffix 'TR' indicates tape and reel packaging configuration. Confirm that the component is sourced from authorized distributors to ensure authenticity. Check current lifecycle status as the original manufacturer documentation may reflect legacy availability. Ensure compatibility with required PCB thermal management practices for the exposed pad.

Special Purpose Amplifiers Selection Notes

Select this component when designing copper interconnects requiring amplification of signals from transimpedance amplifiers. It is suitable for applications needing precise signal quantization and jitter performance. Consider the package type based on board space constraints, as it is available in multiple configurations. Evaluate the LOS threshold requirements against the specific application's signal integrity needs.

Special Purpose Amplifiers Part Context

This part belongs to the SY88403BL series of limiting post amplifiers originally developed by Micrel, now under Microchip Technology. The series is designed to interface directly with TIAs in high-speed data communication systems. The product family targets markets including datacom, telecom, and storage area networks where reliable copper signal transmission is critical.

Special Purpose Amplifiers Replacement Considerations

SY88403BLMG

Special Purpose Amplifiers FAQ

How is the Loss-of-Signal (LOS) sensitivity adjusted?

The LOS sensitivity is set using a single external resistor connected between the VCC supply and the LOSLVL pin. This resistor creates a voltage divider that determines the input amplitude threshold for asserting the LOS signal.

What is the function of the /EN input?

The /EN input is a TTL enable bar that de-asserts the true output signal when driven high. It allows feedback from the LOS output to maintain output stability during loss of signal conditions without removing the input signal.