Philips Semiconductors Product specification
74ALVT162821
2.5V/3.3V 20-bit bus-interface D-type flip-flop;
positive-edge trigger with 30 termination resistors (3-State)
1998 Oct 02
9
V
Y
V
M
V
M
V
M
nQx
t
PZH
t
PHZ
SH00007
nOE
0V
V
OH
0V
3.0V or V
CC
whichever
is less
Waveform 3. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
V
X
V
M
V
M
V
M
nQx
t
PZL
t
PLZ
SH00008
nOE
V
OL
0V
0V
3.0V or V
CC
3.0V or V
CC
whichever
is less
Waveform 4. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORM
PULSE
GENERATOR
V
IN
V
OUT
C
L
V
CC
R
L
Test Circuit for 3-State Outputs
V
M
V
M
t
W
NEGATIVE
PULSE
10% 10%
90%
90%
0V
V
M
V
M
t
W
POSITIVE
PULSE
90% 90%
10%
10%
0V
t
THL
(t
F
)
t
TLH
(t
R
)t
THL
(t
F
)
t
TLH
(t
R
)
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
74ALVT16
SWITCH POSITION
TEST SWITCH
t
PLZ/
t
PZL
6V or V
CC
x
2
t
PLH/
t
PHL
Open
t
PHZ
/t
PZH
GND
6.0V or V
CC
x 2
R
T
R
L
Open
GND
SW00025
D.U.T.
Amplitude Rep. Rate t
W
t
R
t
F
3.0V or V
CC
whichever
is less
v10MHz 500ns
v2.5ns v2.5ns
V
IN
V
IN
