SY89840 Series
Manufacturer: Microchip Technology
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 |
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
AI
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.