SY89250V Datasheet, PDF (1/6 Pages) Micrel Semiconductor – ENHANCED DIFFERENTIAL RECEIVER

Micrel, Inc.
ENHANCED DIFFERENTIAL
RECEIVER
Precision Edge^®
Precision E^SYd⁸g⁹e^2®50V
SY89250V
FEATURES
s 3.3V and 5V power supply options
s 250ps propagation delay
s Very high voltage gain
s Ideal for Pulse Amplifier and Limiting Amplifier
applications
s Data synchronous Enable/Disable (/EN) on Q_HG and
/Q_HG provides for complete glitchless gating of the
outputs
s Ideal for gating timing signals
s Complete solution for high quality, high frequency
crystal oscillator applications
s Available in an ultra-small 8-pin (2mm × 2mm)
MLF™ package
APPLICATIONS
s Oscillator modules
Precision Edge^®
DESCRIPTION
The SY89250V is a differential PECL/ECL receiver/buffer
in a space saving (2mm × 2mm) MLF™ package. The device
is functionally equivalent to the SY100EL16VC, but features
a 70% smaller footprint. It provides a V_BB output for either
single-ended application or as a DC bias for AC-coupling to
the device.
The SY89250V provides an /EN input which is synchro-
nized 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 LOW, 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 HIGH, 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 HIGH, 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 dis-
abled state as long as the /EN input is held HIGH. 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 applica-
tions, where the oscillator can be free running and gated on
and off synchronously without adding extra counts to the
output.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
BLOCK DIAGRAM
FUNCTIONAL CROSS REFERENCE
/Q ₁
D₂
V_BB 3
OE
V_BB
LEN Q
/EN ⁴
LATCH
D
8 ^VCC
7 ^QHG
6 ^/QHG
5 ^VEE
Micrel Part Number PECL/ECL
SY89250V
100k
Functional Cross
SY100EL16VC
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
M9999-052505
[e-mail] or [phone]
1
Rev.: B Amendment: /0
Issue Date: May 2005