LOW SKEW, 1-TO-24 DIFFERENTIAL-
TO-LVCMOS/LVTTL FANOUT BUFFER
The ICS8344I-01 is a low voltage, low skew
ICS fanout buffer and a member of the HiPerClockS ™
HiPerClockS™ family of High Performance Clock Solutions from
IDT. The ICS8344I-01 has two selectable clock in-
puts. The CLKx, nCLKx pairs can accept most
standard differential input levels. The ICS8344I-01 is designed
to translate any differential signal level to LVCMOS/LVTTL lev-
els. The low impedance LVCMOS/LVTTL outputs are designed
www.DatatSohederti4vUe.c5o0mΩ series or parallel terminated transmission lines.
The effective fanout can be increased to 48 by utilizing the
ability of the outputs to drive two series terminated lines.
Redundant clock applications can make use of the dual clock
inputs which also facilitate board level testing. The clock
enable is internally synchronized to eliminate runt pulses on
the outputs during asynchronous assertion/deassertion of the
clock enable pin. The outputs are driven low when disabled.
The ICS8344I-01 is characterized at full 3.3V, full 2.5V and
mixed 3.3V input and 2.5V output operating supply modes.
Guaranteed output and part-to-part skew characteristics make
the ICS8344I-01 ideal for those clock distribution applications
demanding well defined performance and repeatability.
• Twenty-four LVCMOS/LVTTL outputs,
7Ω typical output impedance
• Two selectable differential CLKx, nCLKx inputs
• CLK0, nCLK0 and CLK1, nCLK1 pairs can accept the
following input levels: LVDS, LVPECL, LVHSTL, SSTL, HCSL
• Maximum output frequency: 200MHz
• Translates any single ended input signal to LVCMOS/LVTTL
with resistor bias on nCLK input
• Synchronous clock enable
• Output skew: 250ps (maximum)
• Part-to-part skew: 1ns (maximum)
• Bank skew: 125ps (maximum)
• Propagation delay: 5.25ns (maximum)
• Output supply modes:
• -40°C to 85°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
48 47 46 45 44 43 42 41 40 39 38 37
4 ICS8344-01 33
6 7mm x 7mm x 1.4mm 31
13 14 15 16 17 18 19 20 21 22 23 24
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization
and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
IDT™ / ICS™ LVCMOS/LVTTL FANOUT BUFFER
ICS8344AYI-01 REV. B MAY 10, 2007