ICS854104AG REVISION A JANUARY 30, 2014 4 ©2014 Integrated Device Technology, Inc.
ICS854104 DATASHEET LOW SKEW, 1-TO-4, DIFFERENTIAL-TO-LVDS FANOUT BUFFER
Table 4D. LVDS DC Characteristics, V
DD
= 3.3V ± 5%, T
A
= 0°C to 70°C
Table 5. AC Characteristics, V
DD
= 3.3V ± 5%, T
A
= 0°C to 70°C
NOTE: Electrical parameters are guaranteed over the specified ambient operating temperature range, which is established when the device is
mounted in a test socket with maintained transverse airflow greater than 500 lfpm. The device will meet specifications after thermal equilibrium
has been reached under these conditions.
NOTE: All parameters measured at f
MAX
unless noted otherwise.
NOTE 1: Measured from the differential input crossing point to the differential output crossing point.
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at the differential crossing
point of the input to the differential output crossing point.
NOTE 3: Defined as skew between outputs on different devices operating at the same supply voltages and with equal load conditions. Using
the same type of inputs on each device, the outputs are measured at the differential cross points.
NOTE 4: This parameter is defined in accordance with JEDEC Standard 65.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
V
OD
Differential Output Voltage 250 350 450 mV
V
OD
V
OD
Magnitude Change 50 mV
V
OS
Offset Voltage 1.2 1.3 1.45 V
V
OS
V
OS
Magnitude Change 50 mV
Symbol Parameter Test Conditions Minimum Typical Maximum Units
f
MAX
Output Frequency 700 MHz
t
PD
Propagation Delay; NOTE 1 0.9 1.3 ns
tjit
Buffer Additive Phase Jitter,
RMS; refer to Additive Phase
Jitter Section
155.52MHz, Integration Range:
12kHz – 20MHz)
0.232 ps
tsk(o) Output Skew; NOTE 2, 4 50 ps
tsk(pp) Part-to-Part Skew; NOTE 3, 4 350 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 180 660 ps
odc Output Duty Cycle 45 55 %
ICS854104AG REVISION A JANUARY 30, 2014 5 ©2014 Integrated Device Technology, Inc.
ICS854104 DATASHEET LOW SKEW, 1-TO-4, DIFFERENTIAL-TO-LVDS FANOUT BUFFER
Additive Phase Jitter
The spectral purity in a band at a specific offset from the fundamental
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 fundamental frequency to the power value of
the fundamental. This ratio is expressed in decibels (dBm) or a ratio
of the power in the 1Hz band to the power in the fundamental. When
the required offset is specified, the phase noise is called a dBc value,
which simply means dBm at a specified offset from the fundamental.
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.
As with most timing specifications, phase noise measurements has
issues relating 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 device meets the noise floor of what is
shown, but can actually be lower. The phase noise is dependent on
the input source and measurement equipment.
Additive Phase Jitter @ 155.52MHz
12kHz to 20MHz = 0.232ps (typical)
SSB Phase Noise (dBc/Hz)
Offset from Carrier Frequency (Hz)
ICS854104AG REVISION A JANUARY 30, 2014 6 ©2014 Integrated Device Technology, Inc.
ICS854104 DATASHEET LOW SKEW, 1-TO-4, DIFFERENTIAL-TO-LVDS FANOUT BUFFER
Parameter Measurement Information
3.3V LVDS Output Load AC Test Circuit
Propagation Delay
Output Skew
Differential Input Level
Part-to-Part Skew
Output Duty Cycle/Pulse Width/Period
GND
V
DD
t
PD
Q[0:3]
nQ[0:3]
nCLK
CLK
Qx
nQx
Qy
nQy
V
DD
nCLK
CLK
GND
V
CMR
Cross Points
V
PP
tsk(pp)
Part 1
Part 2
Qx
nQx
Qy
nQy
Q[0:3]
nQ[0:3]

854104AGLF

Mfr. #:
Manufacturer:
IDT
Description:
Clock Buffer 4 LVDS OUTPUT BUFFER
Lifecycle:
New from this manufacturer.
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