PRELIMINARY
ICS83905I
Integrated
Circuit
Systems, Inc.
L
OW
S
KEW, 1:6 CRYSTAL
I
NTERFACE
- -
TO
LVCMOS / LVTTL FANOUT
BUFFER
GENERAL DESCRIPTION
FEATURES
The ICS83905I is a low skew, 1-to-6 LVCMOS / • 6 LVCMOS / LVTTL outputs
ICS
LVTTL Fanout Buffer and a member of the
• Crystal oscillator interface
HiPerClockS™
HiPerClockS™family of High Performance Clock
Solutions from ICS. The ICS83905I single ended
clock input accepts LVCMOS or LVTTL input lev-
els.The low impedance 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.
• Output frequency range: 10MHz to 50MHz
• Crystal input frequency range: 10MHz to 50MHz
• Output skew: 10ps (typical)
• 5V tolerant enable inputs
• Synchronous output enables
The ICS83905I 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 characteris-
tics along with the 1.8V output capabilities makes the
ICS83905I ideal for high performance, single ended applica-
tions that also require a limited output voltage.
• Operating supply modes: Full 3.3V, 2.5V and 1.8V,
mixed 3.3Vcore/2.5V or1.8V operating supply, and
mixed 2.5V core/1.8V operating supply
• -40°C to 85°C ambient operating temperature
• Pin compatible to MPC905
BLOCK DIAGRAM
PIN ASSIGNMENT
BCLK0
1
2
3
4
5
6
7
8
XTAL_OUT
ENABLE 2
GND
16
15
14
13
12
11
10
9
XTAL_IN
ENABLE 1
BCLK5
VDDO
BCLK4
GND
BCLK1
BCLK0
VDDo
BCLK1
GND
XTAL_IN
BCLK3
VDD
BCLK2
BCLK3
XTAL_OUT
BCLK2
ICS83905I
16-Lead SOIC
3.9mm x 9.9mm x 1.38mm body package
M Pacakge
BCLK4
BCLK5
TopView
ICS83905I
16-Lead TSSOP
ENABLE 1
SYNCHRONIZE
4.4mm x 3.0mm x 0.92mm body package
G Pacakge
ENABLE 2
SYNCHRONIZE
TopView
20 19 18 17 16
1
2
3
4
5
BCLK5
VDDO
GND
GND
15
ICS83905I
20-Lead VFQFN 14
4mm x 4mm x 0.9mm
BCLK4
GND
BCLK0
VDDO
13
body package
K Package 12
TopView
GND
BCLK1
11
6
7
8
9 10
The Preliminary Information presented herein represents a product in prototyping or pre-production.The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
83905AMI
http://www.icst.com/products/hiperclocks.html
REV. B JUNE 11, 2004
1