74F244 Philips, 74F244 Datasheet - Page 7

• Manufacturer Part Number: 74F244
• Description: Octal buffers 3-State
• Manufacturer: Philips

Philips Semiconductors
AC WAVEFORMS
For all waveforms, V
TEST CIRCUIT AND WAVEFORMS
1994 Dec 5
SWITCH POSITION
Octal buffers (3-State)
DEFINITIONS:
R
C
R
t
All other
Ian, Ibn
PLZ
T
L
L
TEST
OEn
Waveform 2. 3-State output enable time to high level
GENERATOR
Waveform 1. Propagation Delay for data to outputs
Yn
= Load resistor; see AC electrical characteristics for
= Load capacitance includes jig and probe
= Termination resistance should be equal to Z
, t
PULSE
Yn
PZL
value.
capacitance; see AC electrical characteristics for
value
pulse generators.
and output disable time from high level
Test circuit for 3-State outputs
SWITCH
closed
open
V
M
IN
= 1.5V.
V
M
V
t
PZH
t
M
PLH
R
T
D.U.T.
V
CC
V
V
M
V
M
OUT
V
M
t
V
PHZ
C
M
t
PHL
L
R
R
L
L
OUT
SF00231
V
V
M
OH
SF00233
of
–0.3V
7.0V
0V
NEGATIVE
PULSE
POSITIVE
PULSE
7
family
74F
90%
10%
OEn
amplitude
Yn
Waveform 4. 3-State output enable time to low level
3.0V
Yn, Yn
Yn, Yn
V
V
M
90%
M
INPUT PULSE REQUIREMENTS
10%
and output disable time from low level
t
t
THL (
TLH (
Input pulse definition
1.5V
V
M
Waveform 3. Output skew
t
t
f
r
V
)
)
M
t
PZL
rep. rate
t
t
V
1MHz
w
w
t
M
sk
(0)
V
t
M
t
TLH (
THL (
V
74F244/74F244B
M
t
t
500ns 2.5ns
10%
r
90%
f
)
)
t
w
V
V
V
M
M
M
t
PLZ
SF00232
t
TLH
Product specification
90%
10%
V
2.5ns
t
OL
THL
SF000235
AMP (V)
0V
0V
+0.3V
AMP (V)
SF00234
3.5V