SY89840U Series

Catalog

PRECISION 2:1 LVPECL MUX W/ RPE & FSI 16 VQFN 3X3X1.00MM TUBE ROHS COMPLIANT: YES

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Mounting Type	Voltage Supply Source	Independent Circuits	Supplier Device Package	Type	Package / Case	Circuit [custom]	Circuit [custom]	Operating Temperature [Max]	Operating Temperature [Min]
Microchip Technology SY89840UMG
Microchip Technology SY89840UMG	2.625 V, 3.6 V	2.375 V, 3 V	Surface Mount	Single Supply	1	16-QFN (3x3)	Multiplexer	16-VFQFN Exposed Pad	2:1	1	85 °C	-40 °C

Catalog

Key Features

• + Selects between two sources, and provides a glitch-free, stable LVPECL output

• + Wide operating frequency: 1kHz to >1.5GHz

• + <880ps In-to-Out tpd

• + <190ps tr/tf

• + Unique patent-pending input isolation design minimizes crosstalk

• + Fail-safe input prevents oscillations

• + 140fsRMS phase jitter (typ.)

• + <0.7psRMS MUX crosstalk induced jitter

• + Unique patent-pending input termination and VT pin accepts DC-coupled and AC-coupled inputs (CML, PECL, LVDS)

• + 800mV LVPECL output swing

• + 2.5V ±5% or 3.3V ±10% supply voltage

• + -40°C to +85°C industrial temperature range

• + Available in 16-pin (3mm x 3mm) QFN package

Description

The SY89840U is a low jitter PECL, 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89840U unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or "runt" pulses during switchover. In addition, a unique Fail-Safe Input protection prevents metastable conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops below 100mV).The differential input includes Micrel's unique, 3-pin input termination architecture that allows customers to 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 output is 800mV, 100K compatible LVPECL with fast rise/fall times guaranteed to be less than 190ps.The SY89840U operates from a 2.5V ±5% or 3.3V ±10% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89840U is part of Micrel's high-speed, Precision Edge® product line.