ICS87421AMIT IDT, Integrated Device Technology Inc, ICS87421AMIT Datasheet - Page 7

• Manufacturer Part Number: ICS87421AMIT
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Dividerr

Specifications of ICS87421AMIT

• Number Of Clock Inputs: 1
• Mode Of Operation: Differential
• Output Logic Level: LVDS
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Package Type: SOIC N
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / RoHS Status: Not Compliant

W
R
I
LVCMOS C
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional
protection. A 1k
IDT
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
NPUTS
ECOMMENDATIONS FOR
ICS87421I
÷1/÷2 DIFFERENTIAL-TO-LVDS CLOCK GENERATOR
IRING THE
™
/ ICS
:
™
LVDS CLOCK GENERATOR
ONTROL
D
IFFERENTIAL
resistor can be used.
P
INS
U
NUSED
I
NPUT TO
F
IGURE
I
NPUT
Single Ended Clock Input
A
CCEPT
2. S
A
P
INS
PPLICATION
INGLE
S
INGLE
E
C1
0.1u
NDED
V_REF
DD
/2 is
E
NDED
S
IGNAL
7
I
L
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
EVELS
1K
R1
1K
R2
RIVING
VDD
D
CLK
nCLK
IFFERENTIAL
I
NPUT
ICS87421AMI REV. A OCTOBER 3, 2007
DD
= 3.3V, V_REF should be 1.25V