Texas Instruments THUNDERSWITCH II TNETX4090 - Manual (Page 74)

TNETX4090
ThunderSWITCH II

9-PORT 100-/1000-MBIT/S ETHERNET

SWITCH
SPWS044E – DECEMBER 1997 – REVISED AUGUST 1999
74
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
20%
80% 80%
20%
47% 47%
tf tr
VDD
0
Input
47%
tPLH
VOH
VOL
In-Phase
Output
tPHL
47%
47%
VOH
VOL
Out-of-Phase
Output
tPHL
47%
tPHL
Figure 33. Internal Push/Pull Output Propagation-Delay-Time Voltage Waveforms
20%
80% 80%
20%
47% 47%
tf tr
VDD
0
CMOS-Level
Input
CMOS tPLH
VOH
VOL
LVCMOS/TTL
Output
CMOS tPHL
1.3 V
50%
1.3 V
50%
TTL tPLH TTL tPHL
Figure 34. TTL Output Macro Propagation-Delay-Time Voltage Waveforms