The SY89464U is a low jitter 1:10 LVPECL fanout buffer with a 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89464U's unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or "runt" pulses during switchover. In addition, 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 below 100mV).The differential input includes Micrel's unique, 3-pin internal 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 outputs are 800mV, 100K-compatible LVPECL with fast rise/fall times guaranteed to be less than 220ps.The SY89464U 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 SY89464U is part of Micrel's high-speed, Precision Edge® product line.
Additional Features
Selects between two sources, and provides 10 precision LVPECL copies
Guaranteed AC performance over temperature and supply voltage:
Wide operating frequency: 1kHz to >1.5GHz
<1100ps In-to-Out tpd
<220ps tr/tf
Unique, patent-pending MUX input isolation design minimizes adjacent channel crosstalk
Fail-Safe Input prevents oscillations
Ultra-low jitter design:
<1psRMS random jitter
<1psRMS cycle-to-cycle jitter
<10psPP total jitter (clock)
<0.7psRMS MUX crosstalk induced jitter
Unique patented internal termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
800mV LVPECL output
2.5V ±5% or 3.3V ±10% supply voltage
Output enable
-40°C to +85°C industrial temperature range
Available in 44-pin (7mm x 7mm) QFN package
The SY89464U is a low jitter 1:10 LVPECL fanout buffer with a 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89464U's unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or "runt" pulses during switchover. In addition, 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 below 100mV).The differential input includes Micrel's unique, 3-pin internal 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 outputs are 800mV, 100K-compatible LVPECL with fast rise/fall times guaranteed to be less than 220ps.The SY89464U 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 SY89464U is part of Micrel's high-speed, Precision Edge® product line.
Additional Features
- Selects between two sources, and provides 10 precision LVPECL copies
- Guaranteed AC performance over temperature and supply voltage:
- Wide operating frequency: 1kHz to >1.5GHz
- <1100ps In-to-Out tpd
- <220ps tr/tf
- Unique, patent-pending MUX input isolation design minimizes adjacent channel crosstalk
- Fail-Safe Input prevents oscillations
- Ultra-low jitter design:
- <1psRMS random jitter
- <1psRMS cycle-to-cycle jitter
- <10psPP total jitter (clock)
- <0.7psRMS MUX crosstalk induced jitter
- Unique patented internal termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
- 800mV LVPECL output
- 2.5V ±5% or 3.3V ±10% supply voltage
- Output enable
- -40°C to +85°C industrial temperature range
- Available in 44-pin (7mm x 7mm) QFN package
