SCES620 – DECEMBER 2004
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating conditions for UBT transceiver (unless
otherwise noted) (see Figures 1 and 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN TYP MAX UNIT
f
max
120 MHz
t
PLH
5.1 9.3
t
PHL
3B
4.7 8.3
ns
t
PLH
5.5 10.6
t
PHL
3B
4.9 8.7
ns
t
PLH
5.8 10.1
t
PHL
3B
4.2 8.4
ns
t
PZH
4.2 9.3
t
PZL
3B
3.2 8.5
ns
t
PHZ
4.2 9.3
t
PLZ
2.4 5.7
t
r
Transition time, B port (10%−90%)
4.3 ns
t
f
Transition time, B port (90%−10%)
4.3 ns
t
PLH
1.5 5.9
t
PHL
3A
1.7 5.9
ns
t
PLH
1.7 5.9
t
PHL
3A
1.7 5.9
ns
t
PLH
1.1 5.5
t
PHL
3A
1.4 5.5
ns
t
PZH
1.5 6.2
t
PZL
3A
2.1 5.5
ns
t
PHZ
0.8 6.2
t
PLZ
2.3 5.6
skew characteristics for bus transceiver for specific worst-case V
CC
and temperature within the
recommended ranges of supply voltage and operating free-air temperature (see Figures 1 and 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN MAX UNIT
t
sk(LH)
0.8
t
sk(HL)
0.7
t
sk(LH)
0.7
t
sk(HL)
0.7
1A or 2A 1B or 2B 3.9
sk(t)
1B or 2B 1Y or 2Y 1.5
1A or 2A 1B or 2B 3.6
sk(pp)
1B or 2B 1Y or 2Y 1.4
ns
†
t
sk(t)
− Output-to-output skew is defined as the absolute value of the difference between the actual propagation delay for all outputs of the same
packaged device. The specifications are given for specific worst-case V
CC
and temperature and apply to any outputs switching in opposite
directions, both low to high (LH) and high to low (HL) [t
sk(t)
].
