SY89855U Series

Catalog

LOW POWER, PRECISION 4:1 LVPECL MUX 32 VQFN 5X5X0.9MM T/R ROHS COMPLIANT: YES

Part	Voltage Supply Source	Package / Case	Supplier Device Package	Voltage - Supply [Max]	Voltage - Supply [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Type	Independent Circuits	Mounting Type	Circuit
Microchip Technology SY89855UMG-TR
Microchip Technology SY89855UMG-TR	Single Supply	32-VFQFN Exposed Pad	32-QFN (5x5)	2.625 V, 3.6 V	2.375 V, 3 V	85 °C	-40 °C	Multiplexer	1	Surface Mount	1 x 4:1

Catalog

Key Features

• + Select 1 of 4 differential inputs

• + Provides two copies of the selected input

• + Low power 260mW (VCC = 2.5V)

• + DC-to- >2.5Gbps data rate throughput

• + <410ps In-to-Q tpd

• + <180ps tr/ tf times

• + <10psPP total jitter (clock)

• + <1psRMS random jitter

• + <10psPP deterministic jitter

• + <0.7psRMS crosstalk-induced jitter

• + Unique, patent-pending input design minimizes crosstalk

• + Accepts an input signal as low as 100mV

• + Unique patented input termination and VT pin accepts DC- and AC-coupled inputs (CML, LVPECL, LVDS)

• + 800mV 100K LVPECL output swing

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

• + -40°C to +85°C temperature range

• + Available in 32-pin (5mm x 5mm) QFN package

Description

The SY89855U is a 2.5V/3.3V precision, high-speed, 4:1 differential multiplexer with 100K LVPECL (800mV) compatible outputs, capable of handling clocks up to 2.5GHz and data streams up to 2.5Gbps. In addition, a 1:2 fanout buffer provides two copies of the selected inputs.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 without any level shifting or termination resistor networks in the signal path. The result is a clean, stub-free, low-jitter interface solution. The outputs are 800mV LVPECL, (100K temperature compensated) with fast rise/fall times guaranteed to be less than 180ps.The SY89855U operates from a 2.5V ±5% supply or a 3.3V ±10% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. For applications that require higher performance, consider the SY58029U. The SY89855U is part of Micrel's highspeed, Precision Edge® product line.