74LV240 Ver la hoja de datos (PDF) - Philips Electronics
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74LV240 Datasheet PDF : 12 Pages
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Philips Semiconductors
Octal buffer/line driver; inverting (3-State)
Product specification
74LV240
AC CHARACTERISTICS
GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF; RL = 1KΩ
SYMBOL
PARAMETER
WAVEFORM
CONDITION
VCC(V)
1.2
tPHL/tPLH
Propagation delay
1An to 1Yn;
2An to 2Yn
Figures 1
2.0
2.7
3.0 to 3.6
4.5 to 5.5
1.2
tPZH/tPZL
3-State output enable time
1OE to 1Yn;
2OE to 2Yn
Figures 2
2.0
2.7
3.0 to 3.6
4.5 to 5.5
1.2
tPHZ/tPLZ
3-State output disable time
1OE to 1Yn;
2OE to 2Yn
Figures 2
2.0
2.7
3.0 to 3.6
4.5 to 5.5
NOTES:
1. Unless otherwise stated, all typical values are measured at Tamb = 25°C
2. Typical values are measured at VCC = 3.3 V.
LIMITS
–40 to +85 °C
MIN TYP1 MAX
–40 to +125 °C
MIN MAX
55
19
24
31
14
18
23
102
14
18
12
15
70
24
32
41
18
24
30
132
19
24
16
20
65
24
29
36
18
22
27
142
18
22
15
18
UNIT
ns
ns
ns
AC WAVEFORMS
VM = 1.5V at VCC ≥ 2.7V and ≤ 3.6V;
VM = 0.5V × VCC at VCC < 2.7V and ≥ 4.5V.
VOL and VOH are the typical output voltage drop that occur with the
output load.
VX = VOL + 0.3V at VCC ≥ 2.7V and ≤ 3.6V
VX = VOL + 0.1V × VCC at VCC < 2.7V and 4.5V
VY = VOH – 0.3V at VCC ≥ 2.7V and ≤ 3.6V
VY = VOH – 0.1 × VCC at VCC < 2.7V and ≥ 4.5V
VI
1An , 2An INPUT
VM
GND
tPHL
VOH
1Yn, 2Yn OUTPUT
VM
tPLH
VOL
SV00612
Figure 1. Input (1An, 2An) to output (1Yn, 2Yn)
propagation delays.
VI
nOE INPUT
GND
VCC
Qn OUTPUT
LOW-to-OFF
OFF-to-LOW
VOL
VOH
Qn OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
VM
tPLZ
tPZL
VX
tPHZ
VM
tPZH
outputs
enabled
VY
outputs
disabled
VM
outputs
enabled
SV00613
Figure 2. 3-State enable and disable times.
1998 May 20
6
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