74ALS646 데이터 시트보기 (PDF) - Philips Electronics
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74ALS646 Datasheet PDF : 13 Pages
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Philips Semiconductors
Transceiver/register
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS1
LIMITS
MIN TYP2 MAX
UNIT
VCC±10%, VIL = MAX,
IOH = –0.4mA VCC – 2
V
VOH
High-level output voltage
VIH = MIN
IOH = –3mA
2.4
3.2
V
VCC = MIN, VIL = MAX,
VIH = MIN
IOH = –15mA
2.0
V
All versions
VCC = MIN, VIL = MAX,
VIH = MIN
VOL
Low-level output voltage
IOL = 12mA
IOL = 24mA
-1 versions
VCC = 4.75V, VIL = MAX,
VIH = MIN
IOL = 48mA
0.25 0.40
V
0.35 0.50
V
0.35 0.50
V
VIK
Input clamp voltage
VCC = MIN, II = IIK
–0.73 –1.5
V
II
Input current at maxi-
mum input voltage
control inputs VCC = MAX, VI = 7.0V
A or B ports VCC = MAX, VI = 5.5V
IIH
High-level input current3
VCC = MAX, VI = 2.7V
IIL
Low-level input current3
VCC = MAX, VI = 0.4V
IO
Output current4
VCC = MAX, VO = 2.25V
0.1
mA
0.1
mA
20
µA
–0.1
mA
–30
–112
mA
ICCH
40
57
mA
ICC
Supply current (total)
ICCL
VCC = MAX
53
78
mA
ICCZ
51
72
mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at VCC = 5V, Tamb = 25°C.
3. For I/O ports, the parameter IIH and IIL include the off-state current.
4. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
AC ELECTRICAL CHARACTERISTICS FOR 74ALS646/74ALS646-1
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
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
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
2.0
8.0
3.0
9.0
5.0
13.0
5.0
11.0
5.0
11.0
5.0
11.0
3.0
9.0
5.0
11.0
2.0
8.0
3.0
10.0
2.0
10.0
5.0
12.0
2.0
10.0
3.0
13.0
UNIT
MHz
ns
ns
ns
ns
ns
ns
ns
ns
1991 Feb 08
7
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