SN54ACT16244, 74ACT16244
16-BIT BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCAS116B – MARCH 1990 – REVISED APRIL 1996
PARAMETER MEASUREMENT INFORMATION
2 × V
CC
Open
GND
TEST
S1
S1
t
/t
Open
PLH PHL
/t
500 Ω
From Output
Under Test
t
2 × V
CC
GND
PLZ PZL
t
/t
PHZ PZH
C
= 50 pF
L
500 Ω
(see Note A)
Output
Control
(low-level
enabling)
LOAD CIRCUIT
3 V
0 V
1.5 V
1.5 V
t
PZL
3 V
0 V
t
PLZ
Output
V
Input
CC
1.5 V
1.5 V
Waveform 1
S1 at 2 × V
50% V
CC
20% V
CC
CC
CC
V
V
OL
t
(see Note B)
PLH
t
PHZ
t
PHL
t
PZH
Output
Waveform 2
S1 at GND
V
OH
OH
0 V
80% V
50% V
50% V
Output
CC
CC
V
50% V
CC
OL
(see Note B)
VOLTAGE WAVEFORMS
C includes probe and jig capacitance.
L
VOLTAGE WAVEFORMS
NOTES: A.
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, Z = 50 Ω, t = 3 ns, t = 3 ns.
O
r
f
D. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
6
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