932SQ426_16 Datasheet, PDF (10/25 Pages) Integrated Device Technology – DERIVATIVE SUPPORTING SRNS PCIE CLOCKING

932SQ426
CK420BQ DERIVATIVE SUPPORTING SRNS PCIE CLOCKING
DC Electrical Characteristics - Differential Current Mode Outputs
T_A = T_COM; Supply Voltage VDD = 3.3 V +/-5%
PARAMETER
SYMBOL
CONDITIONS
MIN
Slew rate
dV/dt
Scope averaging on
1
Slew rate matching ∆dV/dt Slew rate matching, Scope averaging on
Rise/Fall Time
Matching
∆Trf
Rise/fall matching, Scope averaging off
TYP
2.3
10
17
MAX
4
20
125
UNITS NOTES
V/ns _{1, 2, 3}
% 1, 2, 4
ps 1, 8, 9
Voltage High
Voltage Low
VHigh Statistical measurement on single-ended 660
716
signal using oscilloscope math function.
VLow
(Scope averaging on)
-150
20
850
mV
150
Max Voltage
Vmax Measurement on single ended signal using
Min Voltage
Vmin
absolute value. (Scope averaging off)
-300
Vswing
Vswing
Scope averaging off
300
Crossing Voltage _{Vcross_abs}
Scope averaging off
250
(abs)
757
-9
1393
338
1150
mV
1, 7
1, 7
mV 1, 2
550
mV 1, 5
Crossing Voltage (var) ∆-Vcross
Scope averaging off
32
140
mV 1, 6
1_{Guaranteed by design and characterization, not 100% tested in production. IREF = VDD/(3xRR). For RR =412Ω (1%), IREF =}
2.67mA. I_OH = 6 x I_REF and V_OH = 0.7V @ Z_O= 85Ω differential impedance.
2 _{Measured from differential waveform}
3 _{Slew rate is measured through the Vswing voltage range centered around differential 0V. This results in a +/-150mV window}
around differential 0V.
4 _{Matching applies to rising edge rate for Clock and falling edge rate for Clock#. It is measured using a +/-75mV window centered}
on the average cross point where Clock rising meets Clock# falling. The median cross point is used to calculate the voltage
thresholds the oscilloscope is to use for the edge rate calculations.
5 _{Vcross is defined as voltage where Clock = Clock# measured on a component test board and only applies to the differential}
rising edge (i.e. Clock rising and Clock# falling).
6 _{The total variation of all Vcross measurements in any particular system. Note that this is a subset of V_cross_min/max (V_cross}
absolute) allowed. The intent is to limit Vcross induced modulation by setting V_cross_delta to be smaller than V_cross absolute.
7 _{Includes overshoot and undershoot.}
8 _{Measured from single-ended waveform}
9 _{Measured with scope averaging off, using statistics function. Variation is difference between min and max.}
IDT® CK420BQ DERIVATIVE SUPPORTING SRNS PCIE CLOCKING
10
932SQ426
REV C 022916