DS90LV049 Datasheet, PDF (4/10 Pages) National Semiconductor (TI) – 3V LVDS Dual Line Driver with Dual Line Receiver

Switching Characteristics (Continued)
Note 8: t_SKD2 or differential channel-to-channel skew is defined as the magnitude difference in the differential propagation delays between two driver channels on
the same device.
Note 9: t_SKD3 or differential part-to-part skew is defined as |t_{PLHD Max} − t_{PLHD Min}| or |t_{PHLD Max} − t_{PHLD Min}|. It is the difference between the minimum and maximum
specified differential propagation delays. This specification applies to devices at the same V_DD and within 5˚C of each other within the operating temperature range.
Note 10: t_SK1 or pulse skew is defined as |t_PHL − t_PLH|. It is the magnitude difference in the propagation delays between the positive going edge and the negative
going edge of the same receiver channel.
Note 11: t_SK2 or channel-to-channel skew is defined as the magnitude difference in the propagation delays between two receiver channels on the same device.
Note 12: t_SK3 or part-to-part skew is defined as |t_{PLH Max} − t_{PLH Min}| or |t_{PHL Max} − t_{PHL Min}|. It is the difference between the minimum and maximum specified
propagation delays. This specification applies to devices at the same V_DD and within 5˚C of each other within the operating temperature range.
Note 13: Generator waveform for all tests unless otherwise specified: f = 1 MHz, Z_O = 50 Ω, t_r ≤ 1 ns, and t_f ≤ 1 ns.
Note 14: Output short circuit current (I_OS) is specified as magnitude only, minus sign indicates direction only.
Note 15: All input voltages are for one channel unless otherwise specified. Other inputs are set to GND.
Note 16: f_MAX generator input conditions: t_r = t_f < 1 ns (0% to 100%), 50% duty cycle, 0 V to 3 V. Output Criteria: duty cycle = 45%/55%, V_OD > 250 mV, all channels
switching.
Note 17: f_MAX generator input conditions: t_r = t_f < 1 ns (0% to 100%), 50% duty cycle, V_ID = 200 mV, V_CM = 1.2 V . Output Criteria: duty cycle = 45%/55%, V_OH
> 2.7 V, V_OL < 0.25 V, all channels switching.
Parameter Measurement Information
FIGURE 1. Driver V_OD and V_OS Test Circuit
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FIGURE 2. Driver Propagation Delay and Transition Time Test Circuit
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