SY89825UHG TR Micrel Inc, SY89825UHG TR Datasheet - Page 8

• Manufacturer Part Number: SY89825UHG TR
• Description: IC BUS CLK DRVR LVPECL 64-TQFP
• Manufacturer: Micrel Inc
• Series: Precision Edge®r
• Type: Fanout Buffer (Distribution), Multiplexer , Translatorr

Specifications of SY89825UHG TR

• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SY89825UHGTR; SY89825UHGTR

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
[e-mail] or [phone]
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
®