N74ALS74ADB 查看數據表（PDF） - Philips Electronics
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N74ALS74ADB Datasheet PDF : 10 Pages
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Philips Semiconductors
Dual D-type flip-flop with set and reset
Product specification
74ALS74A
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS1
LIMITS
UNIT
MIN TYP2 MAX
VOH High-level output voltage
VCC = ±10%,
VIL = MAX, VIH = MIN
IOH = MAX VCC – 2
V
VOL
Low-level output voltage
VCC = MIN, VIL = MAX,
VIH = MIN
IOL = 4mA
IOL = 8mA
0.25 0.40
V
0.35 0.50
V
VIK
Input clamp voltage
VCC = MIN, II = IIK
–0.73 –1.5
V
II
Input current at maximum input
voltage
Dn, CPn
VCC = MAX, VI = 7.0V
SDn, RDn
0.1
mA
0.2
mA
IIH
High–level input current
Dn, CPn
VCC = MAX, VI = 2.7V
SDn, RDn
20
µA
40
µA
IIL
Low–level input current
Dn, CPn
VCC = MAX, VI = 0.4V
SDn, RDn
–0.2 mA
–0.4 mA
IO
Output current3
VCC = MAX, VO = 2.25V
–30
–112 mA
ICC
Supply current (total)4
VCC = MAX
3.0
4.0
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. The output conditions have been chosen to produce a current that closely approximates one half of the true short–circuit output current, IOS.
4. Measure ICC with the Dn, CPn, and SDn grounded, then with Dn, CPn, and RDn grounded.
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
fmax
Maximum clock frequency
tPLH
Propagation delay
tPHL
CPn to Qn or Qn
tPLH
Propagation delay
tPHL
SDn or RD to Qn or Qn
TEST CONDITION
Waveform 1
Waveform 1
Waveform 2, 3
LIMITS
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN
MAX
80
3.0
14.0
3.0
14.0
1.0
8.0
3.0
10.0
UNIT
MHz
ns
ns
AC SETUP REQUIREMENTS
SYMBOL
PARAMETER
tsu (H)
tsu (L)
th (H)
th (L)
tw (H)
tw (L)
tw (L)
trec
Setup time, High or Low
Dn to CPn
Hold time, High or Low
Dn to CPn
CPn Pulse width
High or Low
SDn or RDn Pulse width, Low
Recovery time, SDn or RDn to CPn
TEST CONDITION
Waveform 1
Waveform 1
Waveform 1
Waveform 2, 3
Waveform 2, 3
LIMITS
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN
MAX
6.0
6.0
0.0
0.0
6.0
6.0
6.0
6.0
UNIT
ns
ns
ns
ns
ns
1996 Jul 01
4
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