SN54LV20A Datasheet, PDF (5/15 Pages) Texas Instruments – DAUL 4-INPUT POSITIVE-AND GATE

SN54LV20A, SN74LV20A
DUAL 4ĆINPUT POSITIVEĆNAND GATE
From Output
Under Test
CL
(see Note A)
SCES339E − SEPTEMBER 2000 − REVISED APRIL 2005
PARAMETER MEASUREMENT INFORMATION
Test
Point
From Output
Under Test
CL
(see Note A)
RL = 1 kΩ ^S1
VCC
Open
GND
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open Drain
S1
Open
VCC
GND
VCC
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
LOAD CIRCUIT FOR
3-STATE AND OPEN-DRAIN OUTPUTS
Input
tw
50% VCC
VCC
50% VCC
0V
VOLTAGE WAVEFORMS
PULSE DURATION
Timing Input
50% VCC
tsu
Data Input
50% VCC
th
50% VCC
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VCC
0V
VCC
0V
Input
50% VCC
50% VCC
VCC
0V
tPLH
In-Phase
Output
50% VCC
tPHL
VOH
50% VCC
VOL
tPHL
tPLH
Out-of-Phase
Output
50% VCC
VOH
50% VCC
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
Output
Control
50% VCC
50% VCC
VCC
0V
tPZL
tPLZ
Output
Waveform 1
S1 at VCC
(see Note B)
tPZH
50% VCC
≈VCC
VOL + 0.3 V _VOL
tPHZ
Output
Waveform 2
S1 at GND
(see Note B)
50% VCC
VOH − 0.3 VVOH
≈0 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A. CL includes probe and jig 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.
D. The outputs are measured one at a time, with one input transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPHL and tPLH are the same as tpd.
H. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
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