74lvc1284 NXP Semiconductors, 74lvc1284 Datasheet - Page 5

• Manufacturer Part Number: 74lvc1284
• Description: 3.3v Parallel Printer Interface Transceiver/buffer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
AC WAVEFORMS
V
V
V
V
output load. (V
1995 Nov 10
M
X
Y
OL
LOW-to-OFF
OFF-to-LOW
OFF-to-HIGH
HIGH-to-OFF
3.3V Parallel printer interface transceiver/buffer
= V
= V
= 1.5V
Waveform 1. Input Bn to output An propagation delays
and V
OUTPUTS
OUTPUT
OUTPUT
INPUTS
OL
OH
DIR
to A
DIR
to B
HD
to B
GND
V
V
Waveform 2. 3-State enable and disable times
V
OH
GND
V
V
"0.3V
OH
–0.3V
CC
OH
OL
OL
are the typical output voltage drops that occur with the
CC
outputs
enabled
never goes below 3.0V).
V
V
V
t
t
PLZ
M
M
M
PHZ
t
V
PHL
M
V
V
M
X
V
Y
outputs
disabled
t
PLH
t
PZL
t
PZH
V
M
V
M
SY00001
outputs
enabled
SY00002
V = 2.7V
5
(Input pulse rise and fall time are 3ns, 150ns t pulse width t10 s,
for both a Low to High and a High to Low transition.)
Slew Rate measured between 0.4V and 0.9V - rising.
Slew Rate measured between 2.4V and 1.9V - falling.
Slew Rate measured at TP1.
Waveform 3. Voltage Waveforms Propagation Delay Times
OUTPUT
Waveform 4. Slew Rate Waveforms Voltage Waveforms
OUTPUT
INPUT
(A To B) Measured at Output Pin
INPUT
0.4V
0.9V
t
PLH
1.4V
t1 t2
1.4V
1.4V
t
PHL
74LVC1284
Product specification
t1 t2
V
OUT
SY00008
–1.4V
2.4V
2.4V
0.4V
V
SY00007
OUT
1.9V
2.4V
0.4V