ICS8521BY IDT, Integrated Device Technology Inc, ICS8521BY Datasheet - Page 7

• Manufacturer Part Number: ICS8521BY
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Driverr

Specifications of ICS8521BY

• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: 500MHz
• Output Logic Level: HSTL
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: LQFP
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / RoHS Status: Not Compliant

W
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
8521BY
IRING THE
D
IFFERENTIAL
F
IGURE
I
NPUT TO
2. S
A
PPLICATION
CLK_IN
INGLE
A
0.1uF
CCEPT
C1
E
NDED
DD
S
www.idt.com
/2 is
S
INGLE
IGNAL
R1
1K
V_REF
R2
1K
7
I
NFORMATION
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
and R2/R1 = 0.609.
D
E
RIVING
V
NDED
D
DD
+
-
IFFERENTIAL
D
L
IFFERENTIAL
EVELS
-
I
TO
NPUT
-HSTL F
DD
= 3.3V, V_REF should be 1.25V
L
OW
ANOUT
S
ICS8521
KEW
REV. E JULY 25, 2010
, 1-
B
UFFER
TO
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