Datasheet
SN74VMEH22501
LVTTL-TO-ETL 8-BIT UNIVERSAL BUS TRANSCEIVER AND TWO 1-BIT BUS
TRANSCEIVERS WITH SPLIT LVTTL PORT, FEEDBACK PATH, AND 3-STATE OUTPUTS
SCES357A – JULY 2001 – REVISED SEPTEMBER 2001
6–12
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
MHz
t
PLH
t
PHL
3A
3B ns
t
PLH
t
PHL
LE
3B ns
t
PLH
t
PHL
CLKAB
3B ns
t
PZH
t
PZL
OE
3B ns
t
PHZ
t
PLZ
OE
3B ns
t
r
Transition time, B port (10%–90%)
ns
t
f
Transition time, B port (90%–10%)
ns
t
PLH
t
PHL
3B
3A ns
t
PLH
t
PHL
LE
3A ns
t
PLH
t
PHL
CLKBA
3A ns
t
PZH
t
PZL
OE
3A ns
t
PHZ
t
PLZ
OE
3A ns
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 TYP
†
MAX UNIT
t
sk(LH)
t
sk(HL)
1A or 2A 1B or 2B ns
t
sk(LH)
t
sk(HL)
1B or 2B 1Y or 2Y ns
1A or 2A 1B or 2B
t
sk(t)
‡
1B or 2B 1Y or 2Y
ns
1A or 2A 1B or 2B
t
sk(pp)
1B or 2B 1Y or 2Y
ns
†
All typical values are at V
CC
= 3.3 V, T
A
= 25°C.
‡
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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