Datasheet
SN74VMEH22501A
SCES3620A –DECEMBER 2004–REVISED FEBRUARY 2010
www.ti.com
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 Figure 1 and Figure 2)
FROM TO
PARAMETER MIN MAX UNIT
(INPUT) (OUTPUT)
t
sk(LH)
0.8
1A or 2A 1B or 2B ns
t
sk(HL)
0.7
t
sk(LH)
0.7
1B or 2B 1Y or 2Y ns
t
sk(HL)
0.6
1A or 2A 1B or 2B 1.7
t
sk(t)
(1)
ns
1B or 2B 1Y or 2Y 1.2
1A or 2A 1B or 2B 2.8
t
sk(pp)
ns
1B or 2B 1Y or 2Y 1.4
(1) 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)
].
Skew Characteristics for UBT
for specific worst-case V
CC
and temperature within the recommended ranges of supply voltage and operating free-air
temperature (see Figure 1 and Figure 2)
FROM TO
PARAMETER MIN MAX UNIT
(INPUT) (OUTPUT)
t
sk(LH)
1.3
3A 3B ns
t
sk(HL)
1.1
t
sk(LH)
0.8
CLKAB 3B ns
t
sk(HL)
0.8
t
sk(LH)
0.7
3B 3A ns
t
sk(HL)
0.6
t
sk(LH)
0.7
CLKBA 3A ns
t
sk(HL)
0.6
3A 3B 1.9
CLKAB 3B 2.1
t
sk(t)
(1)
ns
3B 3A 1.2
CLKBA 3A 1
3A 3B 2.8
CLKAB 3B 2.7
t
sk(pp)
ns
3B 3A 1.3
CLKBA 3A 1.2
(1) 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)
].
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