ICS8534AY-01T IDT, Integrated Device Technology Inc, ICS8534AY-01T Datasheet - Page 9

• Manufacturer Part Number: ICS8534AY-01T
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of ICS8534AY-01T

• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: 500MHz
• Output Logic Level: LVPECL
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: TQFP EP
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Not Compliant

Parameter Measurement Information, continued
Output Duty Cycle/Pulse Width/Period
Application Information
Wiring the Differential Input to Accept Single Ended Levels
Figure 2 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 position the V_REF in the
center of the input voltage swing. For example, if the input clock
swing is only 2.5V and V
R2/R1 = 0.609.
IDT™ / ICS™ 3.3V LVPECL FANOUT BUFFER
ICS8534-01
LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
-
nQ0:nQ21
Q0:Q21
CC
= 3.3V, V_REF should be 1.25V and
t
PW
odc =
t
PERIOD
t
PERIOD
t
PW
x 100%
CC
/2 is
9
Figure 2. Single-Ended Signal Driving Differential Input
Single Ended Clock Input
C1
0.1u
V_REF
ICS8534AY-01 REV. A OCTOBER 27, 2008
R1
1K
R2
1K
V
CC
CLK,
PCLK
nCLK.
nPCLK