Philips Semiconductors
Product specification
Quad buffer/line driver with 5-volt
tolerant inputs/outputs (3-state)
74LVC125A
AC WAVEFORMS
V
M
= 1.5 V at V
CC
w
2.7 V;
V
M
= 0.5
S
V
CC
at V
CC
< 2.7 V
V
OL
and V
OH
are the typical output voltage drop that occur with the
output load.
V
X
= V
OL
+ 0.3 V at V
CC
≥
2.7 V
V
X
= V
OL
+ 0.1 V at V
CC
> 2.7 V
V
Y
= V
OH
– 0.3 V at V
CC
≥
2.7 V
V
Y
= V
OH
– 0.1 V at V
CC
< 2.7 V
V
l
nA INPUT
GND
t PHL
V OH
nY OUTPUT
V OL
VM
t PLH
VM
TEST CIRCUIT
V
CC
S
1
2<V
CC
Open
GND
R
L
=500
Ω
V
IN
PULSE
GENERATOR
R
T
D.U.T.
C
L
R
L
=500
Ω
V
OUT
Test Circuit for 3-State Outputs
SWITCH POSITION
TEST
t
PLH
/t
PHL
t
PLZ
/t
PZL
SV00459
SWITCH
Open
2<V
CC
GND
V
CC
t
2.7V
2.7 – 3.6V
V
IN
V
CC
2.7V
t
PHZ
/t
PZH
Figure 1. Input (nA) to output (nY) propagation delays.
VI
nOE Input
GND
tPLZ
VCC
OUTPUT
LOW-to-OFF
OFF-to-LOW
VOL
tPHZ
VOH
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
outputs
enabled
VY
VM
outputs
disabled
outputs
enabled
tPZL
VM
VX
tPZH
VM
DEFINITIONS
R
L
= Load resistor
C
L
= Load capacitance includes jig and probe capacitance
R
T
= Termination resistance should be equal to Z
OUT
of pulse generators.
SW00047
Figure 3. Load circuitry for switching times.
SV00458
Figure 2. 3-state enable and disable times.
1998 Apr 28
6
PHILIPS [ NXP SEMICONDUCTORS ]
