ICS83904-02 Datasheet, PDF (1/15 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-4 CRYSTAL-TO-LVCMOS/LVTTL FANOUT BUFFER

LOW SKEW, 1-TO-4, CRYSTAL-TO-
LVCMOS/LVTTL FANOUT BUFFER
GENERAL DESCRIPTION
The ICS83904-02 is a low skew, high perfor-
ICS
mance 1-to-4 Crystal Oscillator/Crystal-to-LVCMOS
HiPerClockS™ _{Fanout Buffer and a member of the HiPerClockS™}
family of High Performance Clock Solutions from IDT.
The ICS83904-02 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.
Guaranteed output and part-to-part skew characteristics
make the ICS83904-02 ideal for those applications demand-
ing well defined performance and repeatability.
BLOCK DIAGRAM
OE ^Pullup
CLK_SEL0 ^Pulldown
CLK_SEL1 ^Pulldown
ICS83904-02
FEATURES
• Four LVCMOS/LVTTL outputs,
19Ω typical output impedance @ V_DD = V_DDO = 3.3V
• Two Crystal oscillator input pairs
One LVCMOS/LVTTL clock input
• Crystal input frequencry range: 12MHz – 38.88MHz
• Output frequency: 200MHz (maximum)
• Output Skew: 40ps (maximum) @ V_DD = V_DDO = 3.3V
• RMS phase jitter @ 25MHz output, using a 25MHz crystal
(100Hz – 1MHz): 0.16ps (typical) @ V = V = 3.3V
DD
DDO
• RMS phase noise at 25MHz:
Offset
Noise Power
100Hz ............. -118.4 dBc/Hz
1kHz ............. -141.5 dBc/Hz
10kHz ............. -157.2 dBc/Hz
100kHz ............. -157.2 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
• 0°C to 70°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
XTAL_IN0
XTAL_OUT0
OSC
00
XTAL_IN1
XTAL_OUT1
OSC
CLK ^Pulldown
01
10
11
PIN ASSIGNMENT
Q0
CLK_SEL0 1
16 VDDO
XTAL_OUT0 2 15 Q0
XTAL_IN0 3 14 Q1
VDD 4
13 GND
Q1
XTAL_IN1 5 12 Q2
XTAL_OUT1 6 11 Q3
CLK_SEL1 7
10 VDDO
CLK 8
9 OE
Q2
ICS83904-02
16-Lead TSSOP
4.4mm x 5.0mm x 0.92mm
package body
Q3
G Package
Top View
IDT^™ / ICS^™ LVCMOS/LVTTL FANOUT BUFFER
1
ICS83904AG-02 REV. A SEPTEMBER 12, 2007