Datasheet


 
SCLS555 − JUNE 2004
www.ti.com
8
PARAMETER MEASUREMENT INFORMATION
(PUSH-PULL OUTPUT)
50% V
CC1
t
PLH
t
PHL
t
PHL
t
PLH
V
OH
V
OH
V
OL
V
OL
V
CC1
0 V
50% V
CC1
50% V
CC1
Input
Out-of-Phase
Output
In-Phase
Output
50% V
CC1
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
Output
Control
Output
Waveform 1
S1 at V
CC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
V
OL
V
OH
t
PZL
t
PZH
t
PLZ
t
PHZ
≈V
CC
1
0 V
50% V
CC1
V
OL
+ 0.3 V
50% V
CC1
≈0 V
V
CC1
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
t
PLH
/t
PHL
t
PLZ
/t
PZL
t
PHZ
/t
PZH
Open
V
CC1
GND
TEST S1
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: Z
O
= 50 Ω, t
r
≤ 3 ns, t
f
≤ 3 ns.
D. The outputs are measured one at a time, with one input transition per measurement.
E. t
PLZ
and t
PHZ
are the same as t
dis
.
F. t
PZL
and t
PZH
are the same as t
en
.
G. t
PHL
and t
PLH
are the same as t
pd
.
H. All parameters and waveforms are not applicable to all devices.
From Output
Under Test
C
L
= 50 pF
(see Note A)
LOAD CIRCUIT
S1
V
CC1
R
L
= 1 kΩ
GND
Open
50% V
CC1
50% V
CC1
50% V
CC1
50% V
CC1
V
OH
− 0.3 V
Figure 1. Load Circuit and Voltage Waveforms