1-TO-12 DIFFERENTIAL-TO-LVCMOS FANOUT BUFFER - Integrated Circuit Systems
Description
Integrated Circuit Systems, Inc.
ICS83948I-147
LOW SKEW, 1-TO-12 DIFFERENTIAL-TO-LVCMOS/LVTTL FANOUT BUFFER
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
GENERAL DESCRIPTION
The ICS83948I-147 is a low skew, 1-to-12 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 outputs are designed to drive 50Ω series or parallel terminated www.
DataSheet4U.
com 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.
IC S
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 performance and repeatability.
BLOCK DIAGRAM
CLK_EN D Q LE LVCMOS_CLK CLK nCLK 1 Q0 0 Q1 CLK_SEL Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 OE
PIN ASSIGNMENT
GND GND VDDO VDDO Q0 Q1 Q2 Q3
32 31 30 29 28 27 26 25 CLK_SEL LVCMOS_CLK CLK nCLK CLK_EN OE VDD GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Q11 VDDO Q10 GND Q9 VDDO Q8 GND
24 23 22
GND Q4 VDDO Q5 GND Q6 VDDO Q7
ICS83948I-147
21 20 19 18 17
32-Lead LQFP 7mm x 7mm x 1.
4mm package body Y Pac...
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