SY89847UMG-TR

The SY89847U is a 2.5V, 1:5 LVDS 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). The differential input includes Micrel’s unique, 3-pin internal termination architecture that can interface to any differential signal (AC- or DC-coupled) as small as 100mV (200mVPP) without any level shifting or termination resistor networks in the signal path. The outputs are LVDS compatible with very fast rise/fall times guaranteed to be less than 210ps. The SY89847U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89847U is part of Micrel’s high-speed, Precision Edge® product line.

Selects between two sources, and provides 5 precision LVDS copies Fail-Safe Input – Prevents outputs from oscillating when input is invalid Guaranteed AC performance over temperature and supply voltage: DC-to >1.5GHz throughput <1000ps Propagation Delay (IN-to-Q) <210ps Rise/Fall times 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 2.5V ±5% supply voltage -40°C to +85°C industrial temperature range Available in 32-pin (5mm x 5mm) QFN package