The SY89228U is a precision, low jitter 1GHz ÷3, ÷5 clock divider with an LVPECL output. A unique Fail-Safe Input (FSI) protection prevents metastable output conditions when the input clock voltage swing drops significantly below 100mV or input is removed.The differential input includes Micrel's unique, 3-pin internal termination architecture that allows the input 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 270ps.The SY89228U 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 SY89228U is part of Micrel's high-speed, Precision Edge® product line.
Additional Features
Accepts a high-speed input and provides a precision ÷3 and ÷5 sub-rate, LVPECL output
Fail-Safe Input
Prevents oscillations when input is invalid
Guaranteed AC performance over temperature and supply voltage:
DC-to >1.0GHz throughput
<1500ps Propagation Delay (In-to-Q)
<270ps Rise/Fall times
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)
Wide input voltage range VCC to GND
800mV LVPECL output
46% to 54% Duty Cycle(÷ 3)
47% to 53% Duty Cycle(÷ 5)
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
The SY89228U is a precision, low jitter 1GHz ÷3, ÷5 clock divider with an LVPECL output. A unique Fail-Safe Input (FSI) protection prevents metastable output conditions when the input clock voltage swing drops significantly below 100mV or input is removed.The differential input includes Micrel's unique, 3-pin internal termination architecture that allows the input 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 270ps.The SY89228U 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 SY89228U is part of Micrel's high-speed, Precision Edge® product line.
Additional Features
- Accepts a high-speed input and provides a precision ÷3 and ÷5 sub-rate, LVPECL output
- Fail-Safe Input
- Prevents oscillations when input is invalid
- Guaranteed AC performance over temperature and supply voltage:
- DC-to >1.0GHz throughput
- <1500ps Propagation Delay (In-to-Q)
- <270ps Rise/Fall times
- Ultra-low jitter design:
- <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)
- Wide input voltage range VCC to GND
- 800mV LVPECL output
- 46% to 54% Duty Cycle(÷ 3)
- 47% to 53% Duty Cycle(÷ 5)
- 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
