
COMMERCIALTEMPERATURERANGE
IDTCV133
PROGRAMMABLEFLEXPCCLOCKFORP4PROCESSOR
21
Symbol
Parameter
Min.
Typ.
Max.
Unit
tR1
Clock Rise Time(1,2,3)
175
—
700
ps
tF1
Clock Fall Time(1,2,3)
175
—
700
ps
Δ tR
Clock Rise Time Variation(2,3,4)
—
125
ps
Δ tF
Clock Fall Time Variation(2,3,4)
—
125
ps
Rise/Fall Matching(2,3,5)
——
20
%
VHIGH
Voltage HIGH(2,3,6)
660
700
850
mV
VLOW
Voltage LOW (2,3,7)
-150
0
—
mV
VCROSS(ABS)
Crossing Voltage (abs)(2,3,8,9,10)
250
—
550
mV
VCROSS(REL)
Crossing Voltage (rel)(2,3,10,11)
Calc.
—
Calc.
TOTAL
Δ VCROSS
Total Variation of VCROSS Over All Edges(2,3,12)
—
140
mV
tJCYC-CYC
Cycle-to-Cycle Jitter(2,13)
—
350
ps
dT3
Duty Cycle(2,13)
45
—
55
%
VOVS
Maximum Voltage Allowed at Output (overshoot)(2,3,14)
——
VHIGH + 0.3V
V
VUDS
Minimum Voltage Allowed at Output (undershoot)(2,3,15)
-0.3
—
V
VRB
Ringback Margin(2,3)
n/a
—
0.2
V
LVDS AC TIMING REQUIREMENTS
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: TA = 0°C to +70°C
NOTES:
1.
Measured from VOL = 1.75V to VOH =0.525V. Only valid for Rising LVDS and Falling LVDS#. Signal must be monotonic through the VOL to VOH region for tRISE and tFALL.
2.
Test configuration is Rs = 32.2
Ω, Rp = 49.9Ω, 2pF.
3.
Measurement taken from single-ended waveform.
4.
Measured with oscilloscope, averaging off, using Min. Max. statistics. Variation is the delta between Min. and Max.
5.
Measured with oscilloscope, averaging off, the difference between the tRISE (average) of LVDS versus the tFALL (average) of LVDS#.
6.
VHIGH is defined as the statistical average HIGH value as obtained by using the oscilloscope VHIGH math function.
7.
VLOW is defined as the statistical average LOW value as obtained by using the oscilloscope VLOW math function.
8.
Measured at crossing point where the instantaneous voltage value of the rising edge of LVDS equals the falling edge of LVDS#.
9.
This measurement refers to the total variation from the lowest crossing point to the highest, regardless of which edge is crossing.
10. The crossing point must meet the absolute and relative crossing point specifications simultaniously.
11. VCROSS (rel) Min. and Max. are derived using the following: VCROSS (rel) Min. = 0.25V + 0.5 (VHAVG - 0.7V), VCROSS (rel) Max. = 0.55V + 0.5 (0.7V - VHAVG).
12.
Δ VCROSS is defined as the total variation of all crossing voltages of Rising LVDS and Falling LVDS#. This is the maximum allowed variance in VCROSS for any particular system.
13. Measurement is taken from differential waveform.
14. Overshoot is defined as the absolute value of the maximum voltage.
15. Undershoot is defined as the absolute value of the minimum voltage.