IDT8P34S1204I Datasheet, PDF (1/19 Pages) Integrated Device Technology – Maximum input clock frequency

1:4 LVDS Output 1.8V Fanout Buffer
IDT8P34S1204I
DATA SHEET
General Description
The IDT8P34S1204I is a high-performance differential LVDS fanout
buffer. The device is designed for the fanout of high-frequency, very
low additive phase-noise clock and data signals. The
IDT8P34S1204I is characterized to operate from a 1.8V power
supply. Guaranteed low output-to-output and part-to-part skew
characteristics make the IDT8P34S1204I ideal for those clock
distribution applications demanding well-defined performance and
repeatability. Two selectable differential inputs and four low skew
outputs are available. The integrated bias voltage reference enables
easy interfacing of single-ended signals to the device inputs. The
device is optimized for low power consumption and low additive
phase noise.
Features
• Four low skew, low additive jitter LVDS output pairs
• Two selectable, differential clock input pairs
• Differential CLK, nCLK pairs can accept the following differential
input levels: LVDS, CML
• Maximum input clock frequency: 1.2GHz
• LVCMOS/LVTTL interface levels for the control input select
• Output skew: 10ps (typical)
• Propagation delay: 400ps (maximum)
• Low additive phase jitter, RMS; f_REF = 156.25MHz,
10kHz - 20MHz: 43fs (typical)
• Device current consumption (I_DD): 78mA (maximum)
• Full 1.8V supply voltage
• lead-free (RoHS 6), 16-Lead VFQFN package
• -40°C to 85°C ambient operating temperature
Block Diagram
V_DD
CLK0
nCLK0
Pulldown
Pullup/Pulldown
V_DD
CLK1
nCLK1
Pulldown
Pullup/Pulldown
0 _fREF
1
SEL ^Pulldown
V_REF
Voltage
Reference
Pin Assignment
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
12 11 10 9
Q2 13
nQ2 14
Q3 15
nQ3 16
1234
8 V_REF
7 nCLK0
6 CLK0
5 V_DD
IDT8P34S1204I
16-Lead VFQFN
3mm x 3mm x 0.925mm package body
1.7mm x 1.7mm ePad Size
NL Package
Top View
IDT8P34S1204NLGI REVISION A FEBRUARY 27, 2014
1
©2014 Integrated Device Technology, Inc.