74F646A 查看數據表（PDF） - Philips Electronics
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74F646A Datasheet PDF : 16 Pages
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Philips Semiconductors
Transceivers/registers
Product specification
74F646/A/74F648/A
AC ELECTRICAL CHARACTERISTICS FOR 74F646
SYMBOL
PARAMETER
fmax
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPZH
tPZL
tPHZ
tPLZ
tPHZ
tPLZ
Maximum clock frequency
Propagation delay
CPAB or CPBA to An or Bn
Propagation delay
An to Bn or Bn to An
Propagation delay
SAB or SBA to An or Bn
Output enable time
OE to An or Bn
Output enable time
DIR to An or Bn
Output disable time
OE to An or Bn
Output disable time
DIR to An or Bn
TEST CONDITION
Waveform 1
Waveform 1
Waveform 2
Waveform 2, 3
Waveform 5
Waveform 6
Waveform 5
Waveform 6
Waveform 5
Waveform 6
Waveform 5
Waveform 6
LIMITS
Tamb = +25°C
VCC = +5.0V
CL = 50pF, RL = 500Ω
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN TYP MAX
MIN
MAX
100 115
90
5.5
7.5 10.0
5.0
11.5
5.5
8.0 10.0
5.0
11.0
4.0
6.0
9.0
4.0
10.0
4.0
6.5
8.0
4.0
10.0
5.0
7.0
8.5
4.5
10.5
5.0
6.5
8.5
4.5
9.5
5.0
7.0 10.0
4.5
11.0
6.5
8.5 11.0
6.0
12.5
4.5
6.5
9.0
4.0
10.0
6.0
8.5 11.0
5.5
12.5
6.5
9.0 11.5
6.0
12.5
6.5
9.0 11.5
6.0
13.5
5.5
8.5 11.0
4.5
13.0
5.5
8.5 11.0
5.0
12.5
UNIT
MHz
ns
ns
ns
ns
ns
ns
ns
AC SETUP REQUIREMENTS FOR 74F646
SYMBOL
PARAMETER
tsu (H)
tsu (L)
th (H)
th (L)
tw (H)
tw (L)
Setup time, high or low
An or Bn to CPAB or CPBA
Hold time, high or low
An or Bn to CPAB or CPBA
Pulse width, high or low
CPAB or CPBA
TEST CONDITION
Waveform 4
Waveform 4
Waveform 1
LIMITS
Tamb = +25°C
VCC = +5.0V
CL = 50pF, RL = 500Ω
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL= 50pF, RL = 500Ω
MIN TYP MAX
MIN
MAX
4.5
5.0
4.5
5.0
0
0
0
0
4.0
4.0
6.0
6.0
UNIT
ns
ns
ns
1990 Sep 25
8
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