SY89825UHG Micrel Inc, SY89825UHG Datasheet - Page 8
SY89825UHG
Manufacturer Part Number
SY89825UHG
Description
IC,Twenty-Two Distributed-Output Clock Driver,ECL,TQFP,64PIN,PLASTIC
Manufacturer
Micrel Inc
Type
Fanout Buffer (Distribution), Multiplexer , Translatorr
Series
Precision Edge®r
Datasheet
1.SY89825UHY.pdf
(9 pages)
Specifications of SY89825UHG
Number Of Circuits
1
Ratio - Input:output
2:22
Differential - Input:output
Yes/Yes
Input
LVDS, LVPECL
Output
LVPECL
Frequency - Max
2GHz
Voltage - Supply
2.37 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
Frequency-max
2GHz
Number Of Clock Inputs
2
Mode Of Operation
Differential
Output Frequency
2000MHz
Output Logic Level
LVPECL
Operating Supply Voltage (min)
2.37V
Operating Supply Voltage (typ)
2.5/3.3V
Operating Supply Voltage (max)
3.6V
Package Type
TQFP EP
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Signal Type
LVDS/LVPECL
Mounting
Surface Mount
Pin Count
64
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Micrel, Inc.
Output Considerations
Be sure to properly terminate all outputs as shown below, or
equivalent. For AC coupled applications
Notes:
1. For +2.5V systems:
Notes:
1. Power-saving alternative to Thevenin termination.
2. Place termination resistors as close to destination inputs as possible.
3. R
4. Precision, low-cost 3-Resistor networks are available from resistor manufacturers such as Thin Film Technology (www.thinfilm.com).
M9999-011907
hbwhelp@micrel.com or (408) 955-1690
LVPECL TERMINATION RECOMMENDATIONS
R1 = 250
R2 = 62.5
b
resistor sets the DC bias voltage equal to V
“source”
, be sure to include a pull
+3.3V
Figure 1. Parallel Termination–Thevenin Equivalent
t
. For +3.3V systems R
+3.3V
Figure 2. Three-Resistor “Y–Termination”
Z
Z
O
O
= 50
= 50
Z = 50
Z = 50
46 to 49
130
82
R1
R2
50
b
= 46 to 49 .
8
+3.3V
down resistor at the output of each driver. The emmiter follower
outputs requires a DC current path to GND. Unused outputs can be
left floating with minimal impact on skew and jitter.
R b
R1
130
R2
82
50
+3.3V
+3.3V
V t = V
CC
“destination”
—2V
Precision Edge
SY89825U
®