Philips Semiconductors Product specification
74LVT543
3.3V Octal latched transceiver with dual enable
(3-State)
1998 Feb 19
7
An,
Bn
LEAB, LEBA,
EAB, EBA
t
s
(H)
t
h
(H)
t
s
(L)
t
h
(L)
t
w
(L)
1.5V 1.5V 1.5V 1.5V
1.5V1.5V
0V
2.7V
2.7V
0V
NOTE: The shaded areas indicate when the input is permitted
to change for predictable output performance.
SV00114
Waveform 3. Data Setup and Hold Times And Latch Enable
Pulse Width
OEAB, OEBA,
EAB, EBA
t
PZH
t
PHZ
0V
V
OH
–0.3V
An, Bn
1.5V1.5V
1.5V
0V
2.7V
V
OH
SV00115
Waveform 4. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
t
PZL
t
PLZ
V
OL
+0.3V
OEAB, OEBA,
EAB, EBA
An, Bn
1.5V 1.5V
1.5V
2.7V
0V
3.0V
V
OL
SV00116
Waveform 5. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORM
V
M
V
M
t
W
AMP (V)
NEGATIVE
PULSE
10% 10%
90%
90%
0V
V
M
V
M
t
W
AMP (V)
POSITIVE
PULSE
90% 90%
10%
10%
0V
t
THL
(t
F
)
t
TLH
(t
R
)t
THL
(t
F
)
t
TLH
(t
R
)
V
M
= 1.5V
Input Pulse Definition
DEFINITIONS
R
L
= Load resistor; see AC CHARACTERISTICS for value.
C
L
= Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
R
T
= Termination resistance should be equal to Z
OUT
of
pulse generators.
INPUT PULSE REQUIREMENTS
FAMILY
74LVT
PULSE
GENERATOR
V
IN
D.U.T.
V
OUT
C
L
V
CC
R
L
Test Circuit for 3-State Outputs
6.0V
R
T
R
L
SV00092
Open
GND
SWITCH POSITION
TEST SWITCH
t
PLH
/t
PHL
t
PLZ
/t
PZL
t
PHZ
/t
PZH
Open
6V
GND
Amplitude Rep. Rate t
W
t
R
t
F
2.7V 10MHz 500ns 2.5ns 2.5ns
