SY89829UHG Micrel Inc, SY89829UHG Datasheet - Page 9

• Manufacturer Part Number: SY89829UHG
• Description: IC, CLOCK DRIVER, 1GHZ, TQFP-64
• Manufacturer: Micrel Inc
• Type: Clock Driverr

Specifications of SY89829UHG

• Number Of Clock Inputs: 4
• 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
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Signal Type: LVDS/LVPECL
• Mounting: Surface Mount
• Pin Count: 64
• Clock Ic Type: Clock Driver
• Frequency: 1GHz
• No. Of Outputs: 40
• Supply Current: 150µA
• Supply Voltage Range: 2.37V To 3.8V
• Digital Ic Case Style: TQFP
• No. Of Pins: 64
• Lead Free Status / RoHS Status: Compliant

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 50 .
9
+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
SY89829U
®