Datasheet

SN74BCT756
OCTAL BUFFER/DRIVER
WITH OPEN-COLLECTOR OUTPUTS
SCBS056B – OCTOBER 1990 – REVISED JULY 1997
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
t
PLH
t
PHL
t
PHL
t
PLH
V
OH
V
OH
V
OL
V
OL
3 V
0 V
Input
Out-of-Phase
Output
In-Phase
Output
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
Output
Control
(low-level
enable)
High-Level
Pulse
Output
Waveform 2
(see Note B)
V
OL
V
OH
t
PZL
t
PZH
t
PLZ
t
PHZ
3.5 V
0 V
0 V
3 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
NOTES: A. C
L
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 ≤ 10 MHz, t
r
=t
f
≤ 2.5 ns, duty cycle = 50%.
D. The outputs are measured one at a time with one input transition per measurement.
0.3 V
0.3 V
1.5 V 1.5 V
1.5 V
1.5 V
1.5 V 1.5 V
1.5 V 1.5 V
1.5 V 1.5 V
0 V
0 V
t
h
t
su
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Data Input
Timing Input
3 V
3 V
1.5 V
1.5 V 1.5 V
C
L
(see Note A)
LOAD CIRCUIT
VOLTAGE WAVEFORMS
PULSE DURATION
3 V
0 V
1.5 V 1.5 V
3 V
0 V
1.5 V 1.5 V
Low-Level
Pulse
t
w
From Output
Under Test
7 V
(t
PZL
, t
PLZ
, O.C.)
Open
(all others)
Test
Point
R2
R
L
= R1 = R2
S1
R1
Output
Waveform 1
(see Note B)
Figure 1. Load Circuit and Voltage Waveforms