CD54ACT08 Datasheet, PDF (4/9 Pages) Texas Instruments – QUADRUPLE 2-INPUT POSITIVE-AND GATES

CD54ACT08, CD74ACT08
QUADRUPLE 2-INPUT POSITIVE-AND GATES
SCHS312B – JANUARY 2001 – REVISED JUNE 2002
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
CL = 50 pF
(see Note A)
R1 = 500 Ω ^S1
R2 = 500 Ω
2 × VCC
Open
GND
LOAD CIRCUIT
Input
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
2 × VCC
GND
tw
1.5 V
3V
1.5 V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
CLR
Input
CLK
3V
1.5 V
3V
Reference
Input
1.5 V
0V
0V
tsu
th
trec
3V
1.5 V
0V
Data
Input
1.5 V
10%
90%
tr
90%
3V
1.5 V
10% _{0 V}
tf
VOLTAGE WAVEFORMS
RECOVERY TIME
VOLTAGE WAVEFORMS
SETUP AND HOLD AND INPUT RISE AND FALL TIMES
Input
In-Phase
Output
Out-of-Phase
Output
1.5 V
tPLH
50%
10%
tPHL
90%
1.5 V
90%
tPHL
90%
tr
501%0%VCC
tf
tPLH
50%
10%
3V
0V
VOH
501%0%VtfCVCOL
90% ^VOH
VOL
tr
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
Output
Control
1.5 V
3V
1.5 V
0V
Output ^tPZL
Waveform 1
S1 at 2 × VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
tPZH
20% VCC
80% VCC
tPLZ
≈VCC
20% VCC
VOL
tPHZ
80% VCCVOH
≈0 V
VOLTAGE WAVEFORMS
OUTPUT ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and test-fixture capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
Phase relationships between waveforms are arbitrary.
D. For clock inputs, fmax is measured with the input duty cycle at 50%.
E. The outputs are measured one at a time with one input transition per measurement.
F. tPLH and tPHL are the same as tpd.
G. tPZL and tPZH are the same as ten.
H. tPLZ and tPHZ are the same as tdis.
Figure 1. Load Circuit and Voltage Waveforms
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