Low Skew, 1:6 Crystal-to- LVCMOS/LVTTL
Fanout Buffer
ICS83905
DATA SHEET
General Description
Features
The ICS83905 is a low skew, 1-to-6 LVCMOS /
LVTTL Fanout Buffer and a member of the
HiPerClockS™ family of High Performance Clock
Solutions from IDT. The low impedance
• Six LVCMOS / LVTTL outputs
S
IC
• Outputs able to drive 12 series terminated lines
• Crystal Oscillator Interface
HiPerClockS™
• Crystal input frequency range: 10MHz to 40MHz
• Output skew: 80ps (maximum)
LVCMOS/LVTTL outputs are designed to drive 50Ω
series or parallel terminated transmission lines. The effective
fanout can be increased from 6 to 12 by utilizing the ability of the
outputs to drive two series terminated lines.
• RMS phase jitter @ 25MHz, (100Hz – 1MHz): 0.26ps (typical),
VDD = VDDO = 2.5V
The ICS83905 is characterized at full 3.3V, 2.5V, and 1.8V, mixed
3.3V/2.5V, 3.3V/1.8V and 2.5V/1.8V output operating supply
mode. Guaranteed output and part-to-part skew characteristics
along with the 1.8V output capabilities makes the ICS83905 ideal
for high performance, single ended applications that also require a
limited output voltage.
Offset
Noise Power
100Hz.................-129.7 dBc/Hz
1kHz...................-144.4 dBc/Hz
10kHz.................-147.3 dBc/Hz
100kHz...............-157.3 dBc/Hz
• 5V tolerant enable inputs
• Synchronous output enables
• Operating power supply modes:
Full 3.3V, 2.5V, 1.8V
Mixed 3.3V core/2.5V output operating supply
Mixed 3.3V core/1.8V output operating supply
Mixed 2.5V core/1.8V output operating supply
Pin Assignments
• 0°C to 70°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
20
18 17 16
19
ICS83905
packages
GND
1
2
3
4
5
BCLK5
VDDO
15
14
13
12
11
20-Lead VFQFN
4mm x 4mm x 0.925mm
package body
K Package
GND
BCLK0
VDDO
BCLK4
GND
GND
BCLK1
Top View
6
7
8
9 10
Block Diagram
XTAL_IN
XTAL_OUT
ENABLE2
GND
1
2
3
4
5
6
7
8
16
15
14
BCLK0
ENABLE1
BCLK5
BCLK0
VDDO
BCLK1
GND
13 VDDO
12
BCLK1
BCLK2
BCLK3
BCLK4
BCLK5
BCLK4
XTAL_IN
11
10 BCLK3
VDD
GND
9
XTAL_OUT
BCLK2
ICS83905
16-Lead SOIC, 150 Mil
3.9mm x 9.9mm x 1.38mm package body
M Package
Top View
ENABLE 1
ENABLE 2
SYNCHRONIZE
SYNCHRONIZE
16-Lead TSSOP
4.4mm x 5.0mm x 0.925mm package body
G Package
Top View
ICS83905AM REVISION B JULY 20, 2009
1
©2009 Integrated Device Technology, Inc.