831752_16 Datasheet, PDF (5/18 Pages) Integrated Device Technology – Clock Switch for ATCA/AMC and PCIe Applications

831752 Data Sheet
Table 5B. HCSL AC Characteristics, V_DD = 3.3V±5% or 2.5V±5%, T_A = -40°C to 85°C
Symbol
Parameter
Test Conditions
Minimum
f_OUT
Output Frequency
tjit
Buffer Additive Phase Jitter, RMS;
refer to Additive Phase Jitter Plot
100MHz, Integration Range:
12kHz – 20MHz
FCLK to Q
1.75
t_PD
Propagation Delay, NOTE 1
CLK to Q
1.95
CLK to FCLK
1.50
MUX_ISOL
Mux Isolation
f = 100MHz
Edge Rate
Rise/Fall Edge Rate; NOTE 2, 3
0.6
V_RB
t_STABLE
Ringback Voltage; NOTE 2, 4
Time before V_RB is allowed;
NOTE 2, 4
-100
500
V_MAX
Absolute Max Output Voltage;
NOTE 5, 6
V_MIN
Absolute Min Output Voltage;
NOTE 5, 7
-300
V_CROSS
Absolute Crossing Voltage;
NOTE 5, 8, 9
250
V_CROSS
Total Variation of V_CROSS over all
edges; NOTE 5, 8, 10
odc
Output Duty Cycle; NOTE 11
f 312.5MHz
44
f > 312.5MHz
40
Typical
100
0.3
-70
800
-35
385
40
50
50
Maximum
500
0.505
3.65
3.90
3.70
4
100
1350
650
140
56
60
Units
MHz
ps
ns
ns
ns
dB
V/ns
mV
ps
mV
mV
mV
mV
%
NOTE: Measurements taken with Q output and FCLK output.
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 measurements were taken with FCLK, nFCLK and Q, nQ operating as outputs unless otherwise noted.
NOTE 1: Measured from the differential input cross point to the differential output crossing point.
NOTE 2: Measurement taken from differential waveform.
NOTE 3: Measurement from -150mV to +150mV on the differential waveform (derived from Q minus nQ). The signal must be monotonic
through the measurement region for rise and fall time. The 300mV measurement window is centered on the differential zero crossing.
NOTE 4: T_STABLE is the time the differential clock must maintain a minimum ±150mV differential voltage after rising/falling edges before it is
allowed to drop back into the V_RB ±100 differential range. See Parameter Measurement Information Section.
NOTE 5: Measurement taken from single-ended waveform.
NOTE 6: Defined as the maximum instantaneous voltage including overshoot. See Parameter Measurement Information Section.
NOTE 7: Defined as the minimum instantaneous voltage including undershoot. See Parameter Measurement Information Section.
NOTE 8: Measured at crossing point where the instantaneous voltage value of the rising edge of Q equals the falling edge of nQ.
See Parameter Measurement Information Section.
NOTE 9: Refers to the total variation from the lowest crossing point to the highest, regardless of which edge is crossing. Refers to all crossing
points for this measurement. See Parameter Measurement Information Section.
NOTE 10: Defined as the total variation of all crossing voltage of rising Q and falling nQ. This is the maximum allowed variance in the V_CROSS
for any particular system. See Parameter Measurement Information Section.
NOTE 11: Input duty cycle must be 50%.
NOTE 12: Matching applies to rising edge rate for Q and falling edge rate for nQ. It is measured using a ±75mV window centered on the
median crosspoint where Q meets nQ falling. The median crosspoint is used to calculate the voltage thresholds the oscilloscope is to use for
the edge rate calculations. The rise edge rate of Q should be compared to the fall edge rate of nQ, the maximum allowed difference should not
exceed 20% of the slowest edge rate.
©2016 Integrated Device Technology, Inc
5
Revision B June 28, 2016