SY89321L Datasheet, PDF (1/5 Pages) Micrel Semiconductor – 3.3V DIFFERENTIAL LVPECL-to-LVTTL TRANSLATOR

Micrel
3.3V DIFFERENTIAL
LVPECL-to-LVTTL
TRANSLATOR
Precision Edge™
Precision Ed^SYg⁸e⁹™^321L
SY89321L
FEATURES
s 3.3V power supply
s 1.9ns typical propagation delay
s 275MHz f_MAX (clock bit stream, not pseudo-random)
s Differential LVPECL inputs
s 24mA LVTTL outputs
s Flow-through pinouts
s Internal input resistors: pulldown on IN, pulldown
and pullup on /IN
s Q output will default LOW with inputs open
s V_BB output
s Available in ultra-small 8-pin MLF™ (2mm x 2mm)
package
BLOCK DIAGRAM
IN
LVPECL
/IN
Q LVTTL
DESCRIPTION
Precision Edge™
The SY89321L is a differential LVPECL-to-LVTTL
translator requiring only a single +3.3V power. Because
LVPECL (Low Voltage Positive ECL) levels are used, only
+3.3V and ground are required. The SY89321L is functionally
equivalent to the SY100EPT21L, but in an ultra-small
8-lead MLF™ package that features a 70% smaller footprint.
This ultra-small package and low skew single gate design
make the SY89321L ideal for applications that require the
translation of a clock or data signal where minimal space,
low power and low cost are critical.
V_BB allows a differential, single-ended, or AC-coupled
interface to the device. If used, the V_BB output should be
bypassed to V_CC with 0.01µF capacitor.
Under open input conditions, the /IN will be biased at
a V_CC/2 voltage level and the IN input will be pulled to
ground. This condition will force the Q output low to
provide added stability.
The SY89321L is compatible with positive ECL 100k
logic levels.
Precision Edge is a trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
1
Rev.: A Amendment: /0
Issue Date: August 2003