932SQ426 Datasheet, PDF (10/25 Pages) Integrated Device Technology – 64-pin TSSOP and VFQFPN packages

932SQ426
CK420BQ DERIVATIVE SUPPORTING SRNS PCIE CLOCKINGS
DC Electrical Characteristics - Differential Current Mode Outputs
T_A = T_COM; Supply Voltage VDD = 3.3 V +/-5%
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS NOTES
Slew rate
dV/dt
Scope averaging on
1
2.3
4
V/ns 1, 2, 3
Slew rate matching
∆dV/dt
Slew rate matching, Scope
averaging on
9.9
20
% _{1, 2, 4}
Rise/Fall Time Matching
∆Trf
Rise/fall matching, Scope
averaging off
17
125
ps 1, 8, 9
Voltage High
Voltage Low
VHigh
Statistical measurement on
660
716
single-ended signal using
VLow
oscilloscope math function.
-150
20
(Scope averaging on)
850
1
mV
150
1
Max Voltage
Min Voltage
Vmax Measurement on single ended
757
1150
mV
1, 7
Vmin
signal using absolute value.
-300
-9
1, 7
Vswing
Vswing
Scope averaging off
300
1393
mV 1, 2
Crossing Voltage (abs) Vcross_abs
Crossing Voltage (var) ∆-Vcross
Scope averaging off
Scope averaging off
250
338
550
mV 1, 5
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
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 CLOCKINGS
10
932SQ426
REV B 070815