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ICS83948I-147 fiches techniques PDF

Integrated Circuit Systems - 1-TO-12 DIFFERENTIAL-TO-LVCMOS FANOUT BUFFER

Numéro de référence ICS83948I-147
Description 1-TO-12 DIFFERENTIAL-TO-LVCMOS FANOUT BUFFER
Fabricant Integrated Circuit Systems 
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ICS83948I-147 fiche technique
Integrated
Circuit
Systems, Inc.
ICS83948I-147
LOW SKEW, 1-TO-12
DIFFERENTIAL-TO-LVCMOS/LVTTL FANOUT BUFFER
GENERAL DESCRIPTION
The ICS83948I-147 is a low skew, 1-to-12
ICS Differential-to-LVCMOS/LVTTL Fanout Buffer and
HiPerClockS™ a member of the HiPerClockS™ family of High
Performance Clock Solutions from ICS. The
ICS83948I-147 has two selectable clock inputs.
The CLK, nCLK pair can accept most standard differential
input levels. The LVCMOS_CLK can accept LVCMOS or
LVTTL input levels. The low impedance LVCMOS/LVTTL out-
www.DataSheept4uUts.caorme designed to drive 50Ω series or parallel terminated
transmission lines. The effective fanout can be increased
from 12 to 24 by utilizing the ability of the outputs to drive two
series terminated lines.
The ICS83948I-147 is characterized at full 3.3V or full 2.5V
operating supply modes. Guaranteed output and part-to-part
skew characteristics make the ICS83948I-147 ideal for those
clock distribution applications demanding well defined per-
formance and repeatability.
FEATURES
Twelve LVCMOS/LVTTL outputs
Selectable LVCMOS/LVTTL clock
or differential CLK, nCLK inputs
CLK, nCLK pair can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL
LVCMOS_CLK accepts the following input levels:
LVCMOS or LVTTL
Output frequency: 350MHz (maximum)
Output skew (at 3.3V ± 5%): 100ps (maximum)
Part-to-part skew (at 3.3V ± 5%): 1ns (maximum)
Full 3.3V or full 2.5V operating supply
-40°C to 85°C ambient operating temperature
Available in both standard and lead-free RoHS-compliant
packages
BLOCK DIAGRAM
CLK_EN
LVCMOS_CLK
CLK
nCLK
CLK_SEL
1
0
D
Q
LE
OE
PIN ASSIGNMENT
32 31 30 29 28 27 26 25
Q0 CLK_SEL 1
LVCMOS_CLK 2
24 GND
23 Q4
Q1 CLK 3
2 2 VDDO
Q2 nCLK 4 ICS83948I-147 21 Q5
CLK_EN 5
20 GND
Q3 OE 6
19 Q6
Q4 VDD 7
GND 8
1 8 VDDO
17 Q7
Q5 9 10 11 12 13 14 15 16
Q6
Q7
Q8
32-Lead LQFP
Q9 7mm x 7mm x 1.4mm package body
Y Package
Q10 Top View
Q11
83948AYI-147
www.icst.com/products/hiperclocks.html
1
REV. B NOVEMBER 21, 2005

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