Low Skew, 1-to-8 Crystal-to-LVCMOS
Fanout Buffer
83908I-02
Data Sheet
GENERAL DESCRIPTION
FEATURES
• Eight LVCMOS/LVTTL outputs ,
The 83908I-02 is a low skew, high performance 1-to-8
Crystal Oscillator//Crystal-to-LVCMOS fanout buffer from
IDT. The 83908I-02 has selectable single-ended clock
or two crystal-oscillator inputs. There is an output enable to
disable the outputs by placing them into a high-impedance state.
19Ω typical output impedance @ V = V = 3.3V
DD
DDO
• Two Crystal oscillator input pairs
One LVCMOS/LVTTL clock input
• Crystal input frequency range: 10MHz - 40MHz
• Output frequency: 200MHz (typical)
Guaranteed output and part-to-part skew characteristics make
the 83908I-02 ideal for those applications demanding well defined
performance and repeatability.
• Output Skew: 70ps (maximum) @ V = V = 3.3V
DD
DDO
• Part-to-part skew: 700ps (maximum) @ V = V = 3.3V
DD
DDO
• RMS phase jitter @ 25MHz output using a 25MHz crystal
(12kHz - 10MHz): 0.39ps (typical) @ V = V = 3.3V
DD
DDO
Offset
Noise Power
100Hz ..............-111.4 dBc/Hz
1kHz ..............-139.9 dBc/Hz
10kHz ..............-157.3 dBc/Hz
100kHz ..............-157.5 dBc/Hz
• Supply Voltage Modes:
(Core/Output)
3.3V/3.3V
3.3V/2.5V
3.3V/1.8V
2.5V/2.5V
2.5V/1.8V
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package
BLOCK DIAGRAM
Pullup
OE
Pulldown
CLK_SEL0
Pulldown
CLK_SEL1
PIN ASSIGNMENT
VDD
XTAL_IN0
XTAL_OUT0
VDDO
24 GND
1
2
3
4
XTAL_IN0
XTAL_IN1
23
22
21
20
19
18
17
16
15
14
13
OSC
XTAL_OUT1
VDDO
Q7
0 0
Q0
Q1
GND
Q2
Q3
VDDO
5
6
XTAL_OUT0
Q6
Q0
GND
Q5
7
8
9
10
11
12
Q4
VDDO
CLK_SEL1
OE
XTAL_IN1
CLK_SEL0
CLK
OSC
8 LVCMOS Outputs
0 1
XTAL_OUT1
83908I-02
24-Lead, 173-MIL TSSOP
4.4mm x 7.8mm x 0.925mm
body package
Q7
1 0
1 1
Pulldown
CLK
G Package
Top View
©2016 Integrated Device Technology, Inc
1
Revision A March 17, 2016