Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω.
For clock inputs, fmax is measured when the input duty cycle is 50%.
The outputs are measured one at a time with one input transition per measurement.
![SN74LV8T245 Load Circuit for 3-State Outputs GUID-6067D196-44B1-43F1-A69E-1CEB5D7FAF12-low.gif](/ods/images/JAJSP01A/GUID-6067D196-44B1-43F1-A69E-1CEB5D7FAF12-low.gif)
(1) CL includes probe and test-fixture capacitance.
Figure 7-1 Load Circuit for 3-State Outputs![SN74LV8T245 Voltage Waveforms Propagation Delays GUID-C9DF9E82-1296-42F3-8D48-A817BB167077-low.gif](/ods/images/JAJSP01A/GUID-C9DF9E82-1296-42F3-8D48-A817BB167077-low.gif)
(1) S1 = CLOSED, S2 =
OPEN.
(2) S1 = OPEN, S2 =
CLOSED.
(3) The greater between
tPZL and tPZH is the same as
ten.
(4) The greater between
tPLZ and tPHZ is the same as
tdis.
Figure 7-3 Voltage Waveforms Propagation Delays![SN74LV8T245 Voltage Waveforms Propagation Delays GUID-9730FF14-63B9-450E-8D10-3C05B82DD82E-low.gif](/ods/images/JAJSP01A/GUID-9730FF14-63B9-450E-8D10-3C05B82DD82E-low.gif)
(1) The greater between tPLH and tPHL is the same as tpd.
Figure 7-2 Voltage Waveforms Propagation Delays![SN74LV8T245 Voltage Waveforms, Input and Output Transition Times GUID-6166FA54-506A-41C4-8559-71D756BE3E28-low.gif](/ods/images/JAJSP01A/GUID-6166FA54-506A-41C4-8559-71D756BE3E28-low.gif)
(1) The greater between tr and tf is the same as tt.
Figure 7-4 Voltage Waveforms, Input and Output Transition Times