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Micrel Semiconductor
Micrel Semiconductor

SY89312V Datasheet Preview

SY89312V Datasheet

PECL/ECL CLOCK GENERATOR

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SY89312V pdf
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 VBB pin, an internally generated voltage supply, is
available for this device only. For single-ended input
conditions, the unused differential input is connected to VBB
as a switching reference voltage. VBB can also bias AC-
coupled inputs. When used, decouple VBB and VCC via a
0.01µF capacitor and limit current sourcing or sinking to
0.5mA. When not in use, VBB 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 fMAX input
<160ps tr/tf
<440ps tpd
3.3V and 5V power supply operation
100k ECL/PECL-compatible I/O
Internal 75Kinput 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
X
/CLK
X
Note:
1. F = Divide by 2 function.
RESET
H
L
Q
L
F
/Q
H
F
Precision Edge is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 25, 2013
Revision 2.0
hbwhelp@micrel.com or (408) 955-1690



Micrel Semiconductor
Micrel Semiconductor

SY89312V Datasheet Preview

SY89312V Datasheet

PECL/ECL CLOCK GENERATOR

No Preview Available !

SY89312V pdf
Micrel, Inc.
SY89312V
Ordering Information
Part Number
SY89312VMGTR(2)
Package Type
8-pin 2mm × 2mm QFN
Note:
2. Pb-Free package is recommended for new designs.
Operating Range
Industrial
Package Marking
312 with Pb-Free Bar Line Indicator
Lead Finish
Pb-Free NiPdAu
Pin Configuration
8-Pin 2mm × 2mm QFN
Pin Description
Pin Number
2, 3
7, 6
8
5
4
1
Pin Name
CLK, /CLK
Q, /Q
VCC
VEE, ePad
VBB
Reset
Type
Pin Function
100K
ECL/PECL
Input
Differential PECL/ECL Input: Internal 75kΩ pull-down resistor. If left open, pin
defaults LOW (see Input Interface Applications section for single-ended inputs).
100K
ECL/PECL
Output
Differential PECL/ECL Output: Output CLK input divided by 2 (see Output
Interface Applications section for recommendations on terminations).
Positive Power
Supply
Positive Power Supply: Bypass with 0.1
citoFr/s/0..01F low ES
Negative Negative Power Supply: VEE and exposed pad (ePad) must be tied to most
Power Supply negative supply. For PECL/LVPECL connect to ground.
Reference
Voltage
Output
Bias Reference Voltage: VCC–1.4V. Used as reference voltage for single- ended
inputs or AC-coupling to the CLK, /CLK inputs. Maximum sink/source is ±0.5mA
(see Input Interface Applications section).
100k
ECL/PECL
Input
Single-Ended Input: PECL/ECL asynchronous reset.
June 25, 2013
2 Revision 2.0
hbwhelp@micrel.com or (408) 955-1690


Part Number SY89312V
Description PECL/ECL CLOCK GENERATOR
Maker Micrel Semiconductor
Total Page 7 Pages
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