ICS889875AKLFT IDT, Integrated Device Technology Inc, ICS889875AKLFT Datasheet - Page 8

• Manufacturer Part Number: ICS889875AKLFT
• Description: IC BUFFER/DIVIDER LVDS 16-VFQFPN
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Fanout Buffer (Distribution), Divider, Multiplexerr

Specifications of ICS889875AKLFT

• Number Of Circuits: 1
• Ratio - Input:output: 1:2
• Differential - Input:output: Yes/Yes
• Input: CML, LVDS, LVPECL
• Output: LVDS
• Frequency - Max: 2GHz
• Voltage - Supply: 2.375 V ~ 2.625 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-VFQFN
• Frequency-max: 2GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 889875AKLFT

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.
Recommendations for Unused Input Pins
Inputs:
LVCMOS Select Pins
All control pins have internal pull-ups; additional resistance is not
required but can be added for additional protection. A 1kΩ resistor
can be used.
IDT™ / ICS™ LVDS BUFFER/DIVIDER W/INTERNAL TERMINATION
ICS889875
DIFFERENTIAL-TO-LVDS BUFFER/DIVIDER W/INTERNAL TERMINATION
DD
= 3.3V, V_REF should be 1.25V and
DD
/2 is
8
Figure 2. Single-Ended Signal Driving Differential Input
O
LVDS Outputs
All unused LVDS output pairs can be either left floating or
terminated with 100Ω across. If they are left floating, we
recommend that there is no trace attached.
UT
puts:
Single Ended Clock Input
C1
0.1u
ICS889875AK REV. B OCTOBER 27, 2008
V_REF
R1
1K
R2
1K
V
DD
IN
nIN