IDT8T49N006I Datasheet, PDF (1/39 Pages) Integrated Device Technology – Fourth Generation FemtoClock NG PLL technology

Programmable FemtoClock^® NG LVPECL/LVDS
Clock Generator with 6-Outputs
IDT8T49N006I
DATASHEET
General Description
The IDT8T49N006I is a six output Clock Generator with selectable
LVDS or LVPECL outputs. The IDT8T49N006I can generate any one
of four frequencies from a single crystal or reference clock. The four
frequencies are selected from the Frequency Selection Table (Table
3A) and are programmed via I²C interface. The four predefined
frequencies are selected in the user application by two frequency
selection pins. Note the desired programmed frequencies must be
used with the corresponding crystal or clock frequency as indicated
in Table 3A.
Excellent phase noise performance is maintained with IDT’s Fourth
Generation FemtoClock^® NG PLL technology, which delivers
sub-400fs RMS phase jitter.
Features
• Fourth Generation FemtoClock NG PLL technology
• Six selectable LVPECL or LVDS outputs via I²C
• CLK, nCLK input pair can accept the following differential input
levels: LVPECL, LVDS, HCSL
• FemtoClock NG VCO Range: 1.91GHz - 2.5GHz
• RMS phase jitter at 156.25MHz (12kHz - 20MHz): 228fs (typical)
• RMS phase jitter at 156.25MHz (10kHz - 1MHz): 175fs (typical)
• Full 2.5V or 3.3V power supply
• I²C programming interface
• PCI Express (2.5 Gb/S), Gen 2 (5 Gb/s) and Gen 3 (8 Gb/s) jitter
compliant
• -40°C to 85°C ambient operating temperature
• Lead-free (RoHS 6) packaging
Pin Assignment
V EE
SCLK
SDATA
V EE
VCCA
LOCK
V EE
V CC
CLK_SEL
V EE
30 29 28 27 26 25 24 23 22 21
31
20
32
19
33
18
34
17
35
16
36
15
37
14
38
13
39
12
40
11
1 2 3 4 5 6 7 8 9 10
FSEL1
VCC
VEE
ADDR_SEL
FSEL0
nCLK
CLK
VEE
XTAL_OUT
XTAL_IN
IDT8T49N006I
40-Lead VFQFN
6mm x 6mm x 0.95mm package body
4.65mm x 4.65mm E-Pad
NL Package
Top View
IDT8T49N006A-dddNLGI REVISION A OCTOBER 22, 2013
1
©2014 Integrated Device Technology, Inc.