SY100EP14AU Datasheet, PDF (1/8 Pages) Micrel Semiconductor – 2.5V/3.3V 1:5 LVPECL/LVECL/HSTL 2GHz Clock Driver With 2:1 Differential Input MUX

SY100EP14AU
2.5V/3.3V 1:5 LVPECL/LVECL/HSTL 2GHz
Clock Driver With 2:1 Differential Input MUX
General Description
The SY100EP14AU is a high-speed, 2GHz differential
PECL/ECL 1:5 fanout buffer optimized for ultra-low skew
applications. Within device skew is guaranteed to be less
than 25ps over temperature and supply voltage. The wide
supply voltage operation allows this fanout buffer to
operate in 2.5V and 3.3V systems. A V_BB reference is
included for single-supply or AC-coupled PECL/ECL input
applications, thus eliminating resistor networks. When
interfacing to a single-ended or AC-coupled PECL/ECL
input signal, connect the V_BB pin to the unused /CLK pin,
and bypass the pin to V_CC through a 0.01µF capacitor.
The SY100EP14AU features a 2:1 input MUX, making it
an ideal solution for redundant clock switchover
applications. If only one input pair is used, the other pair
may be left floating. In addition, this device includes a
synchronous enable pin that forces the outputs into a fixed
logic state. Enable or disable state is initiated only after
the outputs are in a LOW state, thus eliminating the
possibility of a “runt” clock pulse.
The SY100EP14AU I/O are fully differential and 100K ECL
compatible. Differential 10K ECL logic can interface
directly into the SY100EP14AU inputs.
The SY100EP14AU is part of Micrel’s high-speed clock
synchronization family. For applications that require a
different I/O combination, consult the Micrel website at
www.micrel.com, and choose from a comprehensive
product line of high-speed, low-skew fanout buffers,
translators, and clock generators.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Guaranteed AC parameters over temp/voltage:
– >2GHz f_MAX
– <25ps within-device skew
– <250ps tr/tf time
– <550ps prop delay
• 2:1 Differential MUX input
• Unique, patented MUX input isolation design minimizes
adjacent channel crosstalk
• Flexible supply voltage: 2.5V/3.3V
• Wide operating temperature range: -40°C to +85°C
• V_BB reference for single-ended or AC-coupled PECL
inputs
• 100K ECL compatible outputs
• Inputs accept PECL/LVPECL/ECL/HSTL logic
• 75KΩ internal input pull-down resistors
• Available in a 20-Pin TSSOP package
Applications
• SONET Clock and Data distribution
• Fibre Channel Clock and Data distribution
• Ethernet Clock and Data distribution
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
June 2010
M9999-061110-A
[e-mail] or [phone]