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SY89321L Datasheet

  • SY89321L

  • 3.3V DIFFERENTIAL LVPECL-to-LVTTL TRANSLATOR

  • 40.70KB

  • 5頁

  • MICREL   MICREL

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Micrel
3.3V DIFFERENTIAL
LVPECL-to-LVTTL
TRANSLATOR
Precision Edge鈩?/div>
SY89321L
Precision Edge鈩?/div>
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鈩?(2mm x 2mm)
package
Precision Edge鈩?/div>
DESCRIPTION
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鈩?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 0.01碌F 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.
BLOCK DIAGRAM
LVPECL
IN
Q
/IN
LVTTL
Precision Edge is a trademark of Micrel, Inc.
Micro
LeadFrame and MLF are trademarks of Amkor Technology, Inc.
Rev.: A
Amendment: /0
1
Issue Date: August 2003

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