ICS85310AYI-21LNT IDT, Integrated Device Technology Inc, ICS85310AYI-21LNT Datasheet - Page 5

• Manufacturer Part Number: ICS85310AYI-21LNT
• Description: IC FANOUT BUFFER 1-5 DUAL 32LQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: HiPerClockS™r
• Type: Fanout Buffer (Distribution)r

Specifications of ICS85310AYI-21LNT

• Number Of Circuits: 2
• Ratio - Input:output: 1:5
• Differential - Input:output: Yes/Yes
• Input: HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Output: ECL, LVPECL
• Frequency - Max: 700MHz
• Voltage - Supply: 2.375 V ~ 3.8 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-LQFP
• Frequency-max: 700MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 85310AYI-21LNT

The spectral purity in a band at a specific offset from the funda-
mental compared to the power of the fundamental is called the
dBc Phase Noise. This value is normally expressed using a
Phase noise plot and is most often the specified plot in many
applications. Phase noise is defined as the ratio of the noise
power present in a 1Hz band at a specified offset from the fun-
damental frequency to the power value of the fundamental. This
ratio is expressed in decibels (dBm) or a ratio of the power in
As with most timing specifications, phase noise measurements
have issues. The primary issue relates to the limitations of the
equipment. Often the noise floor of the equipment is higher than
the noise floor of the device. This is illustrated above. The de-
85310AYI-21
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-190
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0
100
1k
D
IFFERENTIAL
10k
A
O
FFSET
DDITIVE
F
-
www.idt.com
ROM
TO
P
-2.5V/3.3V ECL/LVPECL F
100k
C
HASE
5
ARRIER
the 1Hz band to the power in the fundamental. When the re-
quired offset is specified, the phase noise is called a dBc value,
which simply means dBm at a specified offset from the funda-
mental. By investigating jitter in the frequency domain, we get a
better understanding of its effects on the desired application over
the entire time record of the signal. It is mathematically possible
to calculate an expected bit error rate given a phase noise plot.
vice meets the noise floor of what is shown, but can actually be
lower. The phase noise is dependant on the input source and
measurement equipment.
J
F
ITTER
REQUENCY
1M
@ 155.52MHz = <0.13ps typical
Additive Phase Jitter, RMS
(H
Z
)
L
OW
ICS85310I-21
S
10M
KEW
, D
ANOUT
REV. E AUGUST 13, 2010
UAL
100M
, 1-
B
UFFER
TO
-5