74LVC125A データシートの表示（PDF） - Philips Electronics
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74LVC125A Datasheet PDF : 10 Pages
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Philips Semiconductors
Quad buffer/line driver with 5-volt
tolerant inputs/outputs (3-state)
Product specification
74LVC125A
AC WAVEFORMS
VM = 1.5 V at VCC w 2.7 V;
VM = 0.5 S VCC at VCC < 2.7 V
VOL and VOH are the typical output voltage drop that occur with the
output load.
VX = VOL + 0.3 V at VCC ≥ 2.7 V
VX = VOL + 0.1 V at VCC > 2.7 V
VY = VOH – 0.3 V at VCC ≥ 2.7 V
VY = VOH – 0.1 V at VCC < 2.7 V
Vl
nA INPUT
GND
V OH
VM
t PHL
t PLH
nY OUTPUT
VM
V OL
SV00459
Figure 1. Input (nA) to output (nY) propagation delays.
VI
nOE Input
GND
VCC
OUTPUT
LOW-to-OFF
OFF-to-LOW
VOL
VOH
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
VM
tPLZ
tPZL
VX
tPHZ
VY
VM
tPZH
VM
outputs
enabled
outputs
disabled
outputs
enabled
SV00458
Figure 2. 3-state enable and disable times.
TEST CIRCUIT
VCC
PULSE
GENERATOR
VIN
RT
D.U.T.
VOUT
CL
S1
2<VCC
Open
GND
RL=500 Ω
RL=500 Ω
Test Circuit for 3-State Outputs
SWITCH POSITION
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
SWITCH
Open
2<VCC
GND
VCC
t 2.7V
2.7 – 3.6V
VIN
VCC
2.7V
DEFINITIONS
RL = Load resistor
CL = Load capacitance includes jig and probe capacitance
RT = Termination resistance should be equal to ZOUT
of pulse generators.
SW00047
Figure 3. Load circuitry for switching times.
1998 Apr 28
6
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