6.6 Switching Characteristics
Over Recommended Supply Voltage and Operating Temperature Ranges, unless otherwise specified.(1)(2)(3)(4)
| PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
MAX |
UNIT |
| tPHLD |
Differential Propagation Delay High to Low |
RL = 100Ω, CL = 15 pF |
0.5 |
1 |
1.5 |
ns |
| tPLHD |
Differential Propagation Delay Low to High |
(Figure 9 and Figure 10) |
0.5 |
1.1 |
1.5 |
ns |
| tSKD1 |
Differential Pulse Skew |tPHLD − tPLHD|(5) |
|
0 |
0.1 |
0.7 |
ns |
| tSKD4 |
Differential Part to Part Skew(6) |
|
0 |
0.4 |
1.2 |
ns |
| tr |
Rise Time |
|
0.2 |
0.5 |
1 |
ns |
| tf |
Fall Time |
|
0.2 |
0.5 |
1 |
ns |
| fMAX |
Maximum Operating Frequency(7) |
|
200 |
250 |
|
MHz |
(1) All typicals are given for: VDD = +3.3 V and TA = +25°C.
(2) These parameters are specified by design, and not tested in production. The limits are based on statistical analysis of the device performance over PVT (process, voltage, temperature) ranges.
(3) CL includes probe and fixture capacitance.
(4) Generator waveform for all tests unless otherwise specified: f = 1 MHz, ZO = 50 Ω, tr ≤ 1 ns, tf ≤ 1 ns (10%-90%).
(5) tSKD1, |tPHLD − tPLHD|, is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of the same channel.
(6) tSKD2, part to part skew, is the differential channel to channel skew of any event between devices. This specification applies to devices over recommended operating temperature and voltage ranges, and across process distribution. tSKD4 is defined as |Max − Min| differential propagation delay.
(7) fMAX generator input conditions: tr = tf < 1 ns (0% to 100%), 50% duty cycle, 0V to 3V. Output criteria: duty cycle = 45%/55%, VOD > 250 mV. The parameter is specified by design. The limit is based on the statistical analysis of the device over the PVT range by the transitions times (tTLH and tTHL).