The SY89465U is a low-jitter, 1:10 LVDS fanout buffer with a 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89465Us 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 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, 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 LVDS-compatible with fast rise/fall times guaranteed to be less than 220ps.The SY89465U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89465U is part of Micrel's high-speed, Precision Edge® product line.
Additional Features
Selects between two sources, and provides 10 precision LVDS copies
Guaranteed AC performance over temperature and supply voltage:
Wide operating frequency: 1kHz to >1.5GHz
<1200ps In-to-Out tpd
<220ps tr/tf
Unique, patent-pending input isolation design minimizes adjacent channel crosstalk
Fail-Safe Input prevents oscillations
Ultra-low jitter design:
183fsRMS phase jitter (typical)
<0.7psRMS MUX crosstalk-induced jitter
Unique patented input termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
325mV LVDS output swing
2.5V ±5% supply voltage
−40°C to +85°C industrial temperature range
Output enable
Available in 44-pin (7mm x 7mm) QFN package
The SY89465U is a low-jitter, 1:10 LVDS fanout buffer with a 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89465Us 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 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, 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 LVDS-compatible with fast rise/fall times guaranteed to be less than 220ps.The SY89465U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89465U is part of Micrel's high-speed, Precision Edge® product line.
Additional Features
- Selects between two sources, and provides 10 precision LVDS copies
- Guaranteed AC performance over temperature and supply voltage:
- Wide operating frequency: 1kHz to >1.5GHz
- <1200ps In-to-Out tpd
- <220ps tr/tf
- Unique, patent-pending input isolation design minimizes adjacent channel crosstalk
- Fail-Safe Input prevents oscillations
- Ultra-low jitter design:
- 183fsRMS phase jitter (typical)
- <0.7psRMS MUX crosstalk-induced jitter
- Unique patented input termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
- 325mV LVDS output swing
- 2.5V ±5% supply voltage
- −40°C to +85°C industrial temperature range
- Output enable
- Available in 44-pin (7mm x 7mm) QFN package
