sy89251v Micrel Semiconductor, sy89251v Datasheet

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sy89251v

Manufacturer Part Number
sy89251v
Description
Enhanced Differential Receiver
Manufacturer
Micrel Semiconductor
Datasheet

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sy89251vMG TR
Manufacturer:
Micrel Inc
Quantity:
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Company:
Part Number:
sy89251vMG TR
Quantity:
700
General Description
The SY89251V is a differential PECL/ECL receiver/buffer
in a space saving (2mm x 2mm) MLF
device is functionally equivalent to the SY100EL16VC,
except for an active HIGH enable pin and a 70% smaller
footprint. It is also equivalent to the SY89250V, except for
an active HIGH enable pin. It provides a V BB output for
either single-ended application or as a DC bias for AC-
coupling to the device.
The
synchronized with the data input (D) signal in a way that
provides glitchless gating of the Q HG and /Q HG outputs.
When the EN signal is HIGH, the input is passed to the
outputs and the data output equals the data input. When
the data input is HIGH and the EN goes LOW, it will force
the Q HG LOW and the /Q HG HIGH on the next negative
transition of the data input. If the data input is LOW when
the EN goes LOW, the next data transition to a HIGH is
ignored and Q HG remains LOW and /Q HG remains HIGH.
The next positive transition of the data input is not passed
on to the data outputs under these conditions. The Q HG
and /Q HG outputs remain in their disabled state as long as
the EN input is held LOW. The EN input has no influence
on the /Q output and the data input is passed on (inverted)
to this output whether EN is HIGH or LOW. This
configuration is ideal for crystal oscillator applications,
where the oscillator can be free running and gated on and
off synchronously without adding extra counts to the
output.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Block Diagram
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
March 2009
SY89251V
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
provides
an
EN
input
®
package. The
which
is
Features
• 3.3V and 5V power supply options
• 250ps propagation delay
• Very high voltage gain
• Ideal for pulse amplifier and limiting amplifier
• Data synchronous enable/disable (EN) on Q
• Ideal for gating timing signals
• Complete solution for high quality, high frequency
• Available in an ultra-small 8-pin (2mm x 2mm)
Applications
• Oscillator modules
408
applications
/Q
outputs
crystal oscillator applications
MLF
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
HG
®
provides for complete glitchless gating of the
Enhanced Differential Receiver
package
SY89251V
hbwhelp@micrel.com
or (408) 955-1690
M9999-032609-A
HG
and

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sy89251v Summary of contents

Page 1

... General Description The SY89251V is a differential PECL/ECL receiver/buffer in a space saving (2mm x 2mm) MLF device is functionally equivalent to the SY100EL16VC, except for an active HIGH enable pin and a 70% smaller footprint also equivalent to the SY89250V, except for an active HIGH enable pin. It provides output for either single-ended application bias for AC- coupling to the device ...

Page 2

... Pb-Free bar-line indicator 251 with Pb-Free bar-line indicator EN QHG Output 0 Logic Low 1 and /Q outputs. Includes internal 75kΩ pull-up resistor and exposed pad must be tied to most negative EE hbwhelp@micrel.com SY89251V Lead Finish Sn-Pb Sn-Pb Pb-Free NiPdAu Pb-Free NiPdAu Data M9999-032609-A or (408) 955-1690 ...

Page 3

... A Min Typ V –1.085 –1.830 –1.165 –1.810 150 0.5 hbwhelp@micrel.com SY89251V 93°C/W Max Units 3 µA –1.26 V Max Units –0.880 V –1.555 V –0.880 V –1.475 V mV 150 µA µA ...

Page 4

... The lower end of the CMR range varies 1:1 with –3.3V. Note for PECL operation, the V CMR 4 Min Typ 150 150 5 150 -1.3 100 225 (min) will be fixed at 3.3V – |V (min)|. CMR hbwhelp@micrel.com SY89251V Max Units 380 ps 430 ps 730 ps 780 -0.4 V ...

Page 5

... Micrel, Inc. Output Interface Applications Figure 1a. Parallel Thevenin-Equivalent Termination March 2009 Figure 1b. Three Resistor “Y” Termination Figure 1c. Terminating Unused I/O 5 SY89251V M9999-032609-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 6

... Micrel, Inc. Package Information March 2009 8-Pin Ultra-Small EPAD-MicroLeadFrame 6 ® (MLF-8) M9999-032609-A hbwhelp@micrel.com or (408) 955-1690 SY89251V ...

Page 7

... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully March 2009 PCB Thermal Consideration for 8-Pin MLF indemnify Micrel for any damages resulting from such use or sale. © 2009 Micrel, Incorporated. 7 ® Package M9999-032609-A hbwhelp@micrel.com or (408) 955-1690 SY89251V ...

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