74ALS646 View Datasheet(PDF) - Philips Electronics
Part Name
Description
View to exact match
74ALS646 Datasheet PDF : 13 Pages
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Philips Semiconductors
Transceiver/register
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
AC ELECTRICAL CHARACTERISTICS FOR 74ALS648/74ALS648-1
SYMBOL
PARAMETER
TEST CONDITION
fmax
Maximum clock frequency
tPLH
Propagation delay
tPHL
CPBA to An, CPAB to Bn
tPLH
Propagation delay
tPHL
An to Bn or Bn to An
tPLH
Propagation delay
tPHL
SBA to An or SAB to Bn (A or B Low)
tPLH
Propagation delay
tPHL
SBA to An or SAB to Bn (A or B High)
tPZH
Output enable time
tPZL
OE to An or Bn
tPHZ
Output disable time
tPLZ
OE to An or Bn
tPZH
Output enable time
tPZL
DIR to An or Bn
tPHZ
Output disable time
tPLZ
DIR to An or Bn
AC SETUP REQUIREMENTS
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
Waveform 1
Waveform 1
Waveform 2, 3
Waveform 2, 3
Waveform 2, 3
Waveform 5
Waveform 6
Waveform 5
Waveform 6
Waveform 5
Waveform 6
Waveform 5
Waveform 6
TEST CONDITION
Waveform 4
Waveform 4
Waveform 1
LIMITS
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN
MAX
100
5.0
13.0
6.0
13.0
1.0
7.0
3.0
9.0
5.0
13.0
5.0
11.0
4.0
11.0
5.0
11.0
2.0
8.0
4.0
13.0
1.0
8.0
2.0
10.0
3.0
10.0
5.0
12.0
2.0
11.0
2.0
11.0
UNIT
MHz
ns
ns
ns
ns
ns
ns
ns
ns
LIMITS
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
5.0
5.0
0.0
1.0
6.0
4.0
UNIT
ns
ns
ns
1991 Feb 08
8
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