7 Parameter Measurement Information

Figure 7-1 Load Circuit

Figure 7-2 Propagation Delay and
Output Transition Times

Figure 7-3 Input Rise and Fall Times

Figure 7-4 Enable and Disable Times
for 3-State Outputs

Note: NOTE:

A. C_L includes probe and test-fixture capacitance.

B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.

C. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, Z_O = 50 Ω, t_r = 6 ns, t_f = 6 ns.

D. The outputs are measured one at a time with one input transition per measurement.

E. t_PLZ and t_PHZ are the same as t_dis.

F. t_PZL and t_PZH are the same as t_en.

G. t_PLH and t_PHL are the same as t_pd.

Table 7-1 Switching Information Table

PARAMETER		RL	CL	S1	S2
t_en	t_PZH	1 kΩ	50 pF or 150 pF	Open	Closed
t_en	t_PZL	1 kΩ	50 pF or 150 pF	Closed	Open
t_dis	t_PHZ	1 kΩ	50 pF	Open	Closed
t_dis	t_PLZ	1 kΩ	50 pF	Closed	Open
t_pd or t_t		—	50 pF or 150 pF	Open	Open