Datasheet

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    
SLLS428F − JUNE 2000 − REVISED JANUARY 2004
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TTL output switching characteristics over recommended operating conditions (unless otherwise
noted)
PARAMETER TEST CONDITIONS MIN NOM MAX UNIT
V
OH
High-level output voltage I
OH
= −1 mA, V
DD
= MIN 2.10 2.3 V
V
OL
Low-level output voltage I
OL
= 1 mA, V
DD
= MIN GND 0.25 0.5 V
t
r(slew)
Slew rate (rising), magnitude of RX_CLK,
RX_ER, RX_DV/LOS, RXD
0.8 V to 2 V,, C = 5 pF, See Figure 11 0.5 V/ns
t
f(slew)
Slew rate (falling), magnitude of RX_CLK,
RX_ER, RX_DV/LOS, RXD
0.8 V to 2 V, C = 5 pF, See Figure 11 0.5 V/ns
t
su
RXD, RX_DV/LOS, RX_ER setup to ↑ RX_CLK
50% voltage swing, GTX_CLK =30 MHz,
See Figure 11
15 ns
t
su
RXD, RX_DV/LOS, RX_ER setup to ↑ RX_CLK
50% voltage swing, GTX_CLK = 75 MHz,
See Figure 11
5.5 ns
t
h
RXD, RX_DV/LOS, RX_ER hold to ↑ RX_CLK
50% voltage swing, GTX_CLK = 30 MHz,
See Figure 11
15 ns
t
h
RXD, RX_DV/LOS, RX_ER hold to ↑ RX_CLK
50% voltage swing, GTX_CLK = 75 MHz,
See Figure 11
5.5 ns
RXD[0−15]
2.0 V
0.8 V
2.0 V
0.8 V
RX_CLK
RX_DV, RX_ER,
t
su
t
h
t
f(slew)
t
r(slew)
0 V
2.7 V
0 V
t
r(slew)
t
f(slew)
2.7 V
Figure 11. TTL Data Output Valid Levels for ac Measurements