SY100EP140L Datasheet, PDF (1/6 Pages) Micrel Semiconductor – 3.3V PECL/ECL DIFFERENTIAL PHASE-FREQUENCY DETECTOR

Micrel, Inc.
3.3V PECL/ECL DIFFERENTIAL
PHASE-FREQUENCY DETECTOR
Precision Edge^®
Precisio^Sn^Y1E⁰d^0Eg^Pe^1®40L
SY100EP140L
FEATURES
■ >2GHz maximum frequency
■ < 220ps rise/fall time
■ Low-voltage: +3.3V ±10% operation
■ Wide operating temperature range: –40°C to +85°C
■ Fully differential throughput architecture
■ Transfer gain:
1.0mV/degree at 1.4GHz
1.2mV/degree at 1.0GHz
■ Available in 8-Pin SOIC package
ECL Pro™
DESCRIPTION
The SY100EP140L is a high-speed, 2GHz phase-
frequency detector optimized to control ultra-low noise
VCXOs (voltage-controlled crystal oscillators) in telecom and
datacom systems. The phase-frequency detector compares
two input signals—a reference input and a feedback input.
Any mismatches in the two input signal’s phase or frequency
will result in the output UP or DOWN pulse stream. When
the difference between the UP and DOWN outputs are
integrated, the resulting control signal speeds-up or slows-
down a VCO or acts as the error voltage for a precision
VCXO.
The SY100EP140L I/O is 100K LVECL/LVPECL
compatible. The device operates from a +3.0V to +3.6V
(LVPECL) or –3.0V to -3.6V (LVECL) supply voltage. The
output swing is 400mV with < 220ps rise/fall times, which
enables the part to operate at a very high frequency.
Operating temperature range is guaranteed over the –40°C
to +85°C industrial range.
PIN NAMES
Pin
D, /D
U, /U
R
FB
V_CC
V_EE
Function
LVPECL/LVECL differential UP outputs. Terminate
with 50Ω to V_CC–2V.
LVPECL/LVECL differential DOWN outputs.
Terminate with 50Ω to V_CC–2V.
LVPECL/LVECL reference input. Internal 75kΩ
pulldown to V_EE. Default state is logic LOW when
left floating.
LVPECL/LVECL feedback input. Internal 75kΩ
pulldown resistor to V_EE. Default state is logic LOW
when left floating.
Positive supply. Bypass with 0.1µF//0.01µF low
ESR capacitors.
Negative power supply. For PECL operation,
connect to GND.
ECL Pro are trademarks of Micrel, Inc.
Precision Edge is a registered trademarks of Micrel, Inc.
M9999-111605
[e-mail] or [phone]
1
Rev.: D Amendment: /0
Issue Date: November 2005