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83905AM
http://www.icst.com/products/hiperclocks.html
REV. A JANUARY 20, 2005
1
Integrated
Circuit
Systems, Inc.
ICS83905
L
OW
S
KEW
, 1:6 C
RYSTAL
I
NTERFACE
-
TO
-
LVCMOS / LVTTL F
ANOUT
B
UFFER
PRELIMINARY
G
ENERAL
D
ESCRIPTION
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 ICS. The ICS83905 single ended
clock input accepts LVCMOS or LVTTL input lev-
els. The low impedance LVCMOS/LVTTL outputs are designed
to drive 50
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.
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 char-
acteristics along with the 1.8V output capabilities makes the
ICS83905 ideal for high performance, single ended applica-
tions that also require a limited output voltage.
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
F
EATURES
6 LVCMOS / LVTTL outputs
Crystal oscillator interface
Output frequency range: 10MHz to 50MHz
Crystal input frequency range: 10MHz to 50MHz
Output skew: 10ps (typical)
5V tolerant enable inputs
Synchronous output enables
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
0°C to 70°C ambient operating temperature
Lead-Free package fully RoHS compliant
Pin compatible to MPC905
Industrial version available upon request
HiPerClockS
ICS
ICS83905
16-Lead SOIC
3.9mm x 9.9mm x 1.38mm body package
M Pacakge
Top View
ICS83905
16-Lead TSSOP
4.4mm x 3.0mm x 0.92mm body package
G Pacakge
Top View
SYNCHRONIZE
SYNCHRONIZE
BCLK0
BCLK1
BCLK2
BCLK3
BCLK4
BCLK5
ENABLE 1
ENABLE 2
XTAL_IN
XTAL_OUT
XTAL_OUT
ENABLE 2
GND
BCLK0
V
DD
o
BCLK1
GND
BCLK2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
XTAL_IN
ENABLE 1
BCLK5
V
DDO
BCLK4
GND
BCLK3
V
DD
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.
20 19 18 17 16
ICS83905
20-Lead VFQFN
4mm x 4mm x 0.9mm
body package
K Package
Top View
6 7 8 9 10
1
2
3
4
5
15
14
13
12
11
E
X
X
E
n
BCLK5
V
DDO
BCLK4
GND
GND
GND
GND
BCLK0
V
DDO
BCLK1
G
G
B
V
D
B