SY89846U Overview
Description
The SY89846U is a 2.5/3.3V, 1:5 LVPECL fanout buffer with a 2:1 differential input multiplexer (MUX). A unique Fail-Safe Input (FSI) protection prevents metastable output conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops significantly below 100mV).
Key Features
- Selects between two inputs, and provides 5 precision LVPECL copies
- Fail-Safe Input – Prevents outputs from oscillating when input is invalid
- Ultra-low jitter design: – 150fs RMS phase jitter (Typ) – 0.7psRMS MUX crosstalk induced jitter
- Unique, patented MUX input isolation design minimizes adjacent channel crosstalk
- Unique patented internal termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
- Wide input voltage range. VCC to GND
- 40°C to +85°C industrial temperature range
- Available in 32-pin (5mm x 5mm) QFN package
