74LVC16240ADGG 데이터 시트보기 (PDF) - Philips Electronics
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74LVC16240ADGG Datasheet PDF : 10 Pages
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Philips Semiconductors
16-bit buffer/line driver; inverting (3-State)
Product specification
74LVC16240A
AC WAVEFORMS
VM = 1.5V at VCC w 2.7V; VM = 0.5 VCC at VCC t 2.7V.
VOL and VOH are the typical output voltage drop that occur with the
output load.
VX = VOL + 0.3V at VCC w 2.7V; VX = VOL + 0.1 VCC at VCC t 2.7V
VY = VOH –0.3V at VCC w 2.7V; VY = VOH – 0.1 VCC at VCC t 2.7V
VI
An
INPUT
VM
GND
VOH
tPHL
tPLH
Yn
OUTPUT
VM
VOL
SW00045
Waveform 1. Input (An) to output (Yn) propagation delay times
VI
OE INPUT
VM
GND
VCC
Qn OUTPUT
LOW-to-OFF
OFF-to-LOW
VOL
tPLZ
VX
tPZL
VM
VOH
Qn OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
tPHZ
outputs
enabled
tPZH
VY
VM
outputs
disabled
outputs
enabled
SW00046
Waveform 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
Waveform 3. Load circuitry for switching times
1997 Jul 29
6
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