74LV241 데이터 시트보기 (PDF) - Philips Electronics
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74LV241 Datasheet PDF : 12 Pages
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Philips Semiconductors
Octal buffer/line driver (3-State)
Product specification
74LV241
AC WAVEFORMS (Continued)
VM = 1.5 V at VCC ≥ 2.7 V; VM = 0.5 V × VCC at VCC < 2.7 V
VX = VOL + 0.3 V at VCC ≥ 2.7 V; VX = VOL + 0.1 V × VCC at VCC <
2.7 V
VY = VOH – 0.3 V at VCC ≥ 2.7V; VY = VOH – 0.1 × VCC at VCC < 2.7
V
VOL and VOH are the typical output voltage drop that occur with the
output load.
VI
2OE 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
VM
tPZH
outputs
enabled
VY
outputs
disabled
VM
outputs
enabled
SV00619
Figure 3. 3-State enable and disable times for input 2OE.
TEST CIRCUIT
PULSE
GENERATOR
VI
RT
VCC
D.U.T.
S1
2 * VCC
Open
GND
VO
RL = 1k
50pF
CL
RL = 1k
Test Circuit for switching times
DEFINITIONS
RL = Load resistor
CL = Load capacitance includes jig and probe capacitance
RT = Termination resistance should be equal to ZOUT of pulse generators.
SWITCH POSITION
TEST
S1
VCC
VI
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2 < VCC
GND
< 2.7V
2.7–3.6V
VCC
2.7V
SV00895
Figure 4. Load circuitry for switching times.
1998 May 20
7
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