Philips Semiconductors
Product specification
3.3V Parallel printer interface transceiver/buffer
74LVC1284
PIN DESCRIPTION
FUNCTION TABLE
PIN NUMBER
SYMBOL
FUNCTION
INPUTS
OUTPUTS
INPUTS/OUTPUTS
1,2,3,4
A1 - A4
B1 - B4
Data inputs/outputs
DIR
L
HD
L
A5-7
L
Y5-7
L
A1-4
A = B
A = B
A = B
A = B
B1-4
Inputs
Inputs
Inputs
Inputs
IEEE 1284 Std.
outputs/inputs
20,19,18,17
L
L
H
Z
7,8,9
14,13,12
10
A5 - A7
Y5 - Y7
DIR
Data inputs
L
H
H
L
L
L
IEEE 1284 Std. outputs
Direction selection
L
H
H
L
H
H
H
H
L
Inputs Low Outputs Low
B/Y–side high drive
enable/disable
11
HD
L
H
Z
Inputs High
Inputs
Outputs Z
B = A
5,6
GND
Ground (0V)
H
H
L
L
15,16
V
CC
Positive supply voltage
H
H
Inputs
B = A
H = High Voltage
L = Low Voltage
Z = High Impedance, Off-State
1, 2
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
kV
V
ESD Immunity, per Mil Std 883C method 3015
DC supply voltage
"2
V
I
–0.5 to +4.6
"20
CC
DC input diode current
V < 0
I
mA
mA
V
IK
I
DC output diode current
V
O
< 0
"50
OK
3
V
IN
DC input voltage
–0.5 to +5.5
–0.5 to +5.5
–2 to +7
3
V
OUT
B/Y
DC output voltage on B/Y side
V
DC
4
V
B/Y (tr) Transient output voltage on B/Y side
40ns transient
V
OUT
V
A side
DC output voltage on A side
DC output current
–0.5 to V +0.5
V
OUT
CC
I
Outputs in High or Low state
"50
–60 to +150
"200
mA
°C
mA
O
T
Storage temperature range
stg
I
/I
Continuous current through V or GND
CC
CC GND
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
4. V
B/Y (tr) guarantees only that this part will not be damaged by reflections in application so long as the voltage levels remain in the
OUT
specified range.
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
UNIT
MIN
3.0
0
MAX
V
CC
DC supply voltage
3.6
V
V
V
I
Input voltage
V
CC
V
OUT
V
OUT
B/Y output voltage
–0.5
0
5.5
V
A side output voltage
V
CC
V
I
B/Y side output current High
B/Y side output current Low
Operating free-air temperature range
–14
mA
mA
°C
OH
I
14
OL
T
amb
0
+70
3
1995 Nov 10