IDT8P34S1208I Data Sheet 1:8 LVDS OUTPUT 1.8V FANOUT BUFFER
IDT8P34S1208NBGI REVISION A JANUARY 22, 2014 5 ©2014 Integrated Device Technology, Inc.
AC Electrical Characteristics
Table 5. AC Electrical Characteristics, V
DD
= 1.8V ± 5%, T
A
= -40°C to 85°
Note 1.
1. 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 equi-
librium has been reached under these conditions.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
f
REF
Input
Frequency
CLK[0:1],
nCLK[0:1]
1.2 GHz
V/t
Input
Edge Rate
CLK[0:1],
nCLK[0:1]
1.5 V/ns
t
PD
Propagation Delay
Note 2.
2. Measured from the differential input crossing point to the differential output crossing point
CLK[0:1]; nCLK[0:1] to any Qx, nQx
for V
PP
= 0.4V
190 315 400 ps
tsk(o) Output Skew
Note 3.
Note 4.
3. Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at the differential cross points.
4. This parameter is defined in accordance with JEDEC Standard 65.
20 40 ps
tsk(i) Input Skew 10 45 ps
tsk(p) Pulse Skew f
REF
= 100MHz 6 20 ps
tsk(pp) Part-to-Part Skew
Note 5.
5. Defined as skew between outputs on different devices operating at the same supply voltage, same frequency, same temperature and with
equal load conditions. Using the same type of inputs on each device, the outputs are measured at the differential cross points.
250 ps
t
JIT
Buffer Additive Phase
Jitter, RMS; refer to
Additive Phase Jitter
Section
f
REF
= 122.88MHz Square Wave, V
PP
= 1V,
Integration Range: 1kHz – 40MHz
122 221 fs
f
REF
= 122.88MHz Square Wave, V
PP
= 1V,
Integration Range: 10kHz – 20MHz
88 110 fs
f
REF
= 122.88MHz Square Wave, V
PP
= 1V,
Integration Range: 12kHz – 20MHz
84 110 fs
f
REF
= 156.25MHz Square Wave, V
PP
= 1V,
Integration Range: 1kHz – 40MHz
57 107 fs
f
REF
= 156.25MHz Square Wave, V
PP
= 1V,
Integration Range: 10kHz – 20MHz
41 78 fs
f
REF
= 156.25MHz Square Wave, V
PP
= 1V,
Integration Range: 12kHz – 20MHz
41 78 fs
f
REF
= 156.25MHz Square Wave, V
PP
= 0.5V,
Integration Range: 1kHz – 40MHz
55 112 fs
f
REF
= 156.25MHz Square Wave, V
PP
= 0.5V,
Integration Range: 10kHz – 20MHz
40 85 fs
f
REF
= 156.25MHz Square Wave, V
PP
= 0.5V,
Integration Range: 12kHz – 20MHz
40 85 fs
t
R
/ t
F
Output Rise/ Fall Time
10% to 90%
outputs loaded with 100
305 400 ps
20% to 80%
outputs loaded with 100
175 260 ps
MUX
ISOLATION
Mux Isolation
Note 6.
6. Qx, nQx outputs measured differentially. See MUX Isolation diagram in the Parameter Measurement Information section.
f
REF
= 100MHz 80 dB
