SY89312V_13 Datasheet, PDF (1/7 Pages) Micrel Semiconductor – 3.3V/5V, 4GHz PECL/ECL÷2 Clock Generator

SY89312V
3.3V/5V, 4GHz PECL/ECL
÷2 Clock Generator
Precision Edge^®
General Description
The SY89312V is an integrated ÷2 divider with differential
clock inputs. It is functionally equivalent to the
SY100EP32V but in an ultra-small 8-pin QFN package
that features a 70% smaller footprint.
The V_BB pin, an internally generated voltage supply, is
available for this device only. For single-ended input
conditions, the unused differential input is connected to V_BB
as a switching reference voltage. V_BB can also bias AC-
coupled inputs. When used, decouple V_BB and V_CC via a
0.01µF capacitor and limit current sourcing or sinking to
0.5mA. When not in use, V_BB should be left open.
The reset pin is asynchronous and is asserted when it is
high. Upon power-up, the internal flip-flops will be in a
random state; the reset allows for the synchronous use of
multiple SY89312Vs in a system.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Precision Edge^®
Features
• Guaranteed AC performance over temperature and
voltage:
• ^{>4GHz f}MAX ^input
• ^{<160ps t}r^/tf
• ^{<440ps t}pd
• 3.3V and 5V power supply operation
• 100k ECL/PECL-compatible I/O
• Internal 75KΩ input pull-down resistors
• Wide operating temperature range: –40°C to +85°C
• Available in ultra-small 8-pin 2mm × 2mm QFN package
Truth Table⁽¹⁾
CLK
/CLK
RESET
Q
/Q
X
X
H
L
H
L
F
F
Note:
1. F = Divide by 2 function.
Precision Edge is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
June 25, 2013
Revision 2.0
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