Datasheet
SN54LVTH18512, SN54LVTH182512, SN74LVTH18512, SN74LVTH182512
3.3-V ABT SCAN TEST DEVICES
WITH 18-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS671B – AUGUST 1996 – REVISED OCTOBER 1997
32
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (normal mode) (see Figure 14)
SN54LVTH182512 SN74LVTH182512
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 3.3 V
± 0.3 V
V
CC
= 2.7 V
V
CC
= 3.3 V
± 0.3 V
V
CC
= 2.7 V
UNIT
MIN MAX MIN MAX MIN MAX MIN MAX
f
max
CLKAB or CLKBA 100 80 100 80 MHz
t
PLH
A
B
1.5 6 6.7 1.5 5.7 6.4
ns
t
PHL
A
B
1.5 6 6.7 1.5 5.7 6.4
ns
t
PLH
B
A
1.5 5.1 5.8 1.5 4.9 5.6
ns
t
PHL
B
A
1.5 5.1 5.8 1.5 4.9 5.6
ns
t
PLH
CLKAB
B
1.5 7.1 8.1 1.5 6.7 7.7
ns
t
PHL
CLKAB
B
1.5 7.1 8.1 1.5 6.7 7.7
ns
t
PLH
CLKBA
A
1.5 6.3 7.2 1.5 5.8 6.8
ns
t
PHL
CLKBA
A
1.5 6.3 7.2 1.5 5.8 6.8
ns
t
PLH
LEAB
B
1.5 8.7 9.7 1.5 8.2 9.2
ns
t
PHL
LEAB
B
1.5 6.5 6.9 1.5 6.2 6.7
ns
t
PLH
LEBA
A
1.5 7.8 9.2 1.5 7.4 8.4
ns
t
PHL
LEBA
A
1.5 6 6.6 1.5 5.7 6.4
ns
t
PZH
OEAB or OEBA
BorA
1.5 8.4 9.6 1.5 7.9 8.7
ns
t
PZL
OEAB
or
OEBA
B
or
A
1.5 8.4 9.6 1.5 7.9 8.7
ns
t
PHZ
OEAB or OEBA
BorA
2.5 9.1 9.3 2.5 8.4 8.9
ns
t
PLZ
OEAB
or
OEBA
B
or
A
2.5 9.1 9.3 2.5 8.4 8.9
ns
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (test mode) (see Figure 14)
SN54LVTH182512 SN74LVTH182512
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 3.3 V
± 0.3 V
V
CC
= 2.7 V
V
CC
= 3.3 V
± 0.3 V
V
CC
= 2.7 V
UNIT
MIN MAX MIN MAX MIN MAX MIN MAX
f
max
TCK 50 40 50 40 MHz
t
PLH
TCK↓
AorB
2.5 15 18 2.5 14 17
ns
t
PHL
TCK↓
A
or
B
2.5 15 18 2.5 14 17
ns
t
PLH
TCK↓
TDO
1 6 7 1 5.5 6.5
ns
t
PHL
TCK↓
TDO
1.5 7 8 1.5 6.5 7.5
ns
t
PZH
TCK↓
AorB
4 18 21 4 17 20
ns
t
PZL
TCK↓
A
or
B
4 18 21 4 17 20
ns
t
PZH
TCK↓
TDO
1 6 7 1 5.5 6.5
ns
t
PZL
TCK↓
TDO
1.5 6 7 1.5 5.5 6.5
ns
t
PHZ
TCK↓
AorB
4 19 21 4 18 20
ns
t
PLZ
TCK↓
A
or
B
4 18 19.5 4 17 18.5
ns
t
PHZ
TCK↓
TDO
1.5 7.5 9 1.5 7 8.5
ns
t
PLZ
TCK↓
TDO
1.5 7.5 8.5 1.5 7 8
ns
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