PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS83905
L
OW
S
KEW
, 1:6 C
RYSTAL
I
NTERFACE
-
TO
-
LVCMOS / LVTTL F
ANOUT
B
UFFER
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
G
ENERAL
D
ESCRIPTION
The ICS83905 is a low skew, 1-to-6 LVCMOS /
LVTTL Fanout Buffer and a member of the
HiPerClockS™
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 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.
ICS
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
BCLK0
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
BCLK1
XTAL_IN
BCLK2
XTAL_OUT
ICS83905
BCLK3
BCLK4
ENABLE 1
16-Lead SOIC
3.9mm x 9.9mm x 1.38mm body package
M Pacakge
Top View
SYNCHRONIZE
BCLK5
ICS83905
16-Lead TSSOP
4.4mm x 3.0mm x 0.92mm body package
G Pacakge
Top View
XTAL_OUT
ENABLE2
ENABLE1
XTAL_IN
ENABLE 2
SYNCHRONIZE
GND
GND
BCLK0
V
DDO
BCLK1
1
2
20 19 18 17 16
ICS83905
15
nc
BCLK5
V
DDO
BCLK4
GND
GND
20-Lead VFQFN
14
4mm x 4mm x 0.9mm
3
body package 13
4
K Package
12
5
6
GND
Top View
7
GND
11
BCLK3
8
BCLK2
9 10
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.
83905AM
http://www.icst.com/products/hiperclocks.html
1
REV. A JANUARY 20, 2005
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
