fanout buffer and a member of the HiPerClockS 鈩?/div>
HiPerClockS鈩?/div>
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
to drive 50惟 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.
F
EATURES
鈥?/div>
Twenty-four LVCMOS/LVTTL outputs,
7惟 typical output impedance
鈥?/div>
Two selectable differential CLKx, nCLKx inputs
鈥?/div>
CLK0, nCLK0 and CLK1, nCLK1 pairs can accept the
following input levels: LVDS, LVPECL, LVHSTL, SSTL, HCSL
鈥?/div>
Maximum output
frequency:
200MHz
鈥?/div>
Translates any single ended input signal to LVCMOS/LVTTL
with resistor bias on nCLK input
鈥?/div>
Synchronous clock enable
鈥?/div>
Output skew: 250ps (maximum)
鈥?/div>
Part-to-part skew: 1ns (maximum)
鈥?/div>
Bank skew: 125ps (maximum)
鈥?/div>
Propagation delay: 5.25ns (maximum)
鈥?/div>
Output supply modes:
Core/Output
3.3V/3.3V
2.5V/2.5V
3.3V/2.5V
鈥?/div>
-40擄C to 85擄C ambient operating temperature
鈥?/div>
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
IC
S
Guaranteed output and part-to-part skew characteristics make
the ICS8344I-01 ideal for those clock distribution applications
demanding well defined performance and repeatability.
B
LOCK
D
IAGRAM
CLK_SEL
CLK0
nCLK0
CLK1
nCLK1
0
1
Q0:Q7
P
IN
A
SSIGNMENT
48 47 46 45 44 43 42 41 40 39 38 37
1
2
3
4
5
48-Lead LQFP
6
7mm x 7mm x 1.4mm
7
package body
8
Y Package
9
Top View
10
11
12
13 14 15 16 17 18 19 20 21 22 23 24
Q8
Q9
V
DDO
GND
Q10
Q11
Q12
Q13
V
DDO
GND
Q14
Q15
Q8:Q15
Q16:Q23
LE
Q
Q16
Q17
V
DDO
GND
Q18
Q19
Q20
Q21
V
DDO
GND
Q22
Q23
ICS8344-01
36
35
34
33
32
31
30
29
28
27
26
25
Q7
Q6
V
DDO
GND
Q5
Q4
Q3
Q2
V
DDO
GND
Q1
Q0
CLK_EN
nc
OE
CLK_EN
CLK0
nCLK0
V
DD
GND
CLK1
nCLK1
V
DD
GND
CLK_SEL
nD
OE
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.
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