Datasheet
SN74VMEH22501A
SCES3620A –DECEMBER 2004–REVISED FEBRUARY 2010
www.ti.com
Switching Characteristics for UBT
over recommended operating conditions (unless otherwise noted) (see Figure 3)
FROM TO
PARAMETER MIN TYP
(1)
MAX UNIT
(INPUT) (OUTPUT)
t
PLH
6.2 8.9
3A 3B ns
t
PHL
5.6 9
t
PLH
6.1 9.1
LE 3B ns
t
PHL
5.6 9
t
PLH
6.2 9.1
CLKAB 3B ns
t
PHL
5.7 9
t
r
(2)
Transition time, B port (10%–90%) 9 8.6 11.4 ns
t
f
(2)
Transition time, B port (90%–10%) 8.9 9 10.8 ns
(1) All typical values are at V
CC
= 3.3 V, T
A
= 25°C. All values are derived from TI-SPICE models.
(2) All t
r
and t
f
times are taken at the first receiver.
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 3)
FROM TO
PARAMETER MIN TYP
(1)
MAX UNIT
(INPUT) (OUTPUT)
t
sk(LH)
2.5
1A or 2A 1B or 2B ns
t
sk(HL)
3
t
sk(t)
(2)
1A or 2A 1B or 2B 1 ns
t
sk(pp)
1A or 2A 1B or 2B 0.5 3.4 ns
(1) All typical values are at V
CC
= 3.3 V, T
A
= 25°C. All values are derived from TI-SPICE models.
(2) 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 3)
FROM TO
PARAMETER MIN TYP
(1)
MAX UNIT
(INPUT) (OUTPUT)
t
sk(LH)
2.4
3A 3B ns
t
sk(HL)
3.4
t
sk(LH)
2.7
CLKAB 3B ns
t
sk(HL)
3.4
3A 3B 1
t
sk(t)
(2)
ns
CLKAB 3B 1
3A 3B 0.5 3.4
t
sk(pp)
ns
CLKAB 3B 0.6 3.5
(1) All typical values are at V
CC
= 3.3 V, T
A
= 25°C. All values are derived from TI-SPICE models.
(2) 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)
].
Driver in Slot 1, With One Receiver in Slot 21 (Minimum Load)
Switching Characteristics for Bus Transceiver Function
over recommended operating conditions (unless otherwise noted) (see Figure 3)
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