PI6C485311WEX Pericom Semiconductor, PI6C485311WEX Datasheet - Page 5

• Manufacturer Part Number: PI6C485311WEX
• Description: Clock Buffer 3.3V Low Skew 1:2 Diff
• Manufacturer: Pericom Semiconductor

Specifications of PI6C485311WEX

• Number Of Outputs: 4
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: -40C to 85C
• Propagation Delay Time: 2ns
• Operating Supply Voltage (min): 3V
• Mounting: Surface Mount
• Pin Count: 8
• Operating Supply Voltage (typ): 3.3V
• Package Type: SOIC
• Input Frequency: 800MHz
• Duty Cycle: 60%
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Compliant

Applications Information
Wiring the differenctial input to accept single ended levels
Figure 1 shows how the differential input can be wired to accept single ended levels. The reference voltage V_REF = V
generated by the bias resistors R1, R2 and C1. This bias circuit should be located as close as possible to the input pin. The ratio of
R1 and R2 might need to be adjusted to postion the V_REF in the center of the input voltage swing. For example, if the input clock
swing is only 2.5V and V
06-0283
DD
= 3.3V, V_REF should be 1.25V and R1/R2 = 0.609.
Figure 2: Single-ended Signal Driving Differential Input
Single Ended
Clock Input
0.1μ
C1
R1
1K
R2
1K
5
V
DD
Differential to LVPECL Fanout Buffer
CLK1
nCLK1
3.3V Low Skew 1-to-2
P8865D
PI6C485311
DD
/2 is
11/14/06