The SY89847U is a 2.5V, 1:5 LVDS fanout buffer with a 2:1 differential input multiplexer (MUX). 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 significantly below 100mV).The differential input includes Micrel's unique, 3-pin internal termination architecture that can 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 very fast rise/fall times guaranteed to be less than 210ps.The SY89847U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89847U is part of Micrel's high-speed, Precision Edge® product line.
Additional Features
Selects between two sources, and provides 5 precision LVDS copies
Fail-Safe Input
Prevents outputs from oscillating when input is invalid
Guaranteed AC performance over temperature and supply voltage:
DC-to >1.5GHz throughput
<1000ps Propagation Delay (IN-to-Q)
<210ps Rise/Fall times
Ultra-low jitter design:
150fsRMS phase jitter (typ.)
<0.7psRMS MUX crosstalk induced jitter
Unique, patented MUX input isolation design minimizes adjacent channel crosstalk
Unique, patented internal termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
Wide input voltage range VCC to GND
2.5V ±5% supply voltage
-40°C to +85°C industrial temperature range
Available in 32-pin (5mm x 5mm) QFN package
The SY89847U is a 2.5V, 1:5 LVDS fanout buffer with a 2:1 differential input multiplexer (MUX). 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 significantly below 100mV).The differential input includes Micrel's unique, 3-pin internal termination architecture that can 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 very fast rise/fall times guaranteed to be less than 210ps.The SY89847U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89847U is part of Micrel's high-speed, Precision Edge® product line.
Additional Features
- Selects between two sources, and provides 5 precision LVDS copies
- Fail-Safe Input
- Prevents outputs from oscillating when input is invalid
- Guaranteed AC performance over temperature and supply voltage:
- DC-to >1.5GHz throughput
- <1000ps Propagation Delay (IN-to-Q)
- <210ps Rise/Fall times
- Ultra-low jitter design:
- 150fsRMS phase jitter (typ.)
- <0.7psRMS MUX crosstalk induced jitter
- Unique, patented MUX input isolation design minimizes adjacent channel crosstalk
- Unique, patented internal termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
- Wide input voltage range VCC to GND
- 2.5V ±5% supply voltage
- -40°C to +85°C industrial temperature range
- Available in 32-pin (5mm x 5mm) QFN package
