74LVC646ADB データシートの表示（PDF） - Philips Electronics
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74LVC646ADB Datasheet PDF : 16 Pages
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Philips Semiconductors
Octal bus transceiver/register (3-State)
Product specification
74LVC646A
AC CHARACTERISTICS
GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF
SYMBOL
PARAMETER
WAVEFORM
tPHL/tPLH
Propagation delay
An, Bn to Bn, An
Figures 1, 6
tPHL/tPLH
tPHL/tPLH
tPZH/tPZL
Propagation delay
CPAB, CPBA to Bn, An
Propagation delay
SAB, SBA to Bn, An
3-State output enable time
OEn to An, Bn
Figures 2, 6
Figures 3, 6
Figures 4, 6
tPHZ/tPLZ
3-State output disable time
OEn to An, Bn
Figures 4, 6
tPZH/tPZL
3-State output enable time
DIR to An, Bn
Figures 5, 6
tPHZ/tPLZ
3-State output disable time
DIR to An, Bn
Figures 5, 6
Clock pulse width
tW
HIGH or LOW
CPAB or CPBA
Figure 1, 3
tsu
Set-up time
An, Bn to CPAB, CPBA
Figure 2
th
Hold time
An, Bn to CPAB, CPBA
Figure 2
fmax
Maximum clock pulse frequency
Figure 2
NOTE:
1. These typical values are at VCC = 3.3V and Tamb = 25°C.
LIMITS
VCC = 3.3V ±0.3V
MIN TYP1 MAX
VCC = 2.7V
MIN MAX
1.5
3.9
6.8
1.5
7.8
VCC =
1.2V
TYP
15
1.5
4.6
7.6
1.5
8.6
19
1.5
4.9
8.5
1.5
9.5
19
1.5
4.5
7.8
1.5
8.8
20
1.5
3.9
6.1
1.5
7.1
10
1.5
4.6
7.9
1.5
8.9
20
1.5
3.5
6.0
1.5
7.0
12
UNIT
ns
ns
ns
ns
ns
ns
ns
3.3
1.9
–
3.3
–
–
ns
1.6 0.35
–
1.6
–
–
ns
1.0 –0.3
–
1.0
–
–
ns
150 250
–
125
–
–
ns
1998 Jul 29
8
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