74ACT1284TTR [STMICROELECTRONICS]
QUAD LINE TRANSCEIVER, PDSO20, TSSOP-20;
| 型号： | 74ACT1284TTR |
| 厂家： | 
ST |
| 描述： | QUAD LINE TRANSCEIVER, PDSO20, TSSOP-20 驱动 光电二极管 接口集成电路 驱动器 |
| 文件： | 总11页 (文件大小：242K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74ACT1284
HIGH SPEED IEEE1284 TRANSCEIVER
■
■
■
■
HIGH SPEED:
= 6.5 ns (Max. 85°C) at V = 4.5V
T
PD
CC
LOW POWER DISSIPATION:
= 80 µA (MAX.) at V = 5.5V T = 85 °C
I
CC
CC
TTL COMPATIBLE INPUTS
= 2V (Min.) V = 0.8V (Max.)
V
IH
IL
SOP
TSSOP
OPERATING VOLTAGE RANGE:
(OPR.) = 4.5V to 5.5V
V
CC
■
■
A Port have standard 4mA totem pole output
B Port high drive source/sink capability of
14mA
Support IEEE Std 1284-I (level 1 type) and
IEEE Std 1284-II (level 2 type) for bidirectional
parallel communications between personal
computer and printing peripherals.
ORDER CODES
PACKAGE
TUBE
T & R
■
SOP
74ACT1284M
74ACT1284MTR
74ACT1284TTR
TSSOP
PIN CONNECTION
DESCRIPTION
The 74ACT1284 contains four high-speed non-in-
verting bidirectional buffers and three non-invert-
ing buffers with open drain outputs fabricated in
2
silicon gate C MOS technology.
It’s intended to provide a standard signaling meth-
od for a bidirection parallel peripheral in an Ex-
tended Capabilities Port mode (ECP).
The HD (active High) input pin enables the B ports
to switch from Open Drain to a high drive totem
pole output, capable of sourcing 14mA on all sev-
en buffers. The DIR input determines the direction
of data flow on the bidirectional buffers.
DIR (active High) enables data flow from A Port to
B Port. DIR (active Low) enables data flow from B
Port to A Port.
ESD protection is greater than 2000V per Method
3015.7 of MIL-STD-883B. It’s available in the
commercial temperature ranges.
July 2003
1/11
74ACT1284
LOGIC DIAGRAM
PIN DESCRIPTION
PIN N.
SYMBOL
NAME AND FUNCTION
Side A Input or Output
1 - 4
5, 6
A1 - A4
GND
Ground
7 - 9
10
A5 - A7
DIR
Side A Input
Direction Control Input
High Drive Enable Input
Side B Output
11
HD
12 - 14
15, 16
B5 - B7
V
Power Supply
CC
TRUTH TABLE
INPUT
FUNCTION
OUTPUTS
DIR
HD
L
L
L
H
L
B5 - B7 Open Drain
B5 - B7 Totem Pole
B1 - B7 Open Drain
B1 - B7 Totem Pole
B1 - B4 Data to A1 - A4
A5 - A7 Data to B5 - B7
H
H
A1 - A7 Data to B1 - B7
H
2/11
74ACT1284
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
Supply Voltage
-0.5 to +7
V
V
CC
V
DC Input Voltage A Side
DC Input Voltage B Side
DC Output Voltage A Side
DC Output Voltage B Side
DC Input Diode Current
DC Output Diode Current
DC Output Current
-0.5 to V + 0.5
IA
IB
CC
(1)
V
V
-2 to +7
V
V
I
-0.5 to V + 0.5
V
OA
OB
IK
CC
(1)
V
-2 to +7
± 20
± 50
mA
mA
mA
mA
°C
°C
I
OK
I
± 50
O
I
or I
DC V or Ground Current
± 200
CC
GND
CC
T
Storage Temperature
-65 to +150
300
STG
T
Lead Temperature (10 sec)
L
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
(1) The AC input voltage pulse width is limited to 20ns if the input voltage goes more negative than -0.5V.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
Supply Voltage
4.5 to 5.5
V
V
CC
V
Input Voltage
0 to V
I
CC
V
Output Voltage
HD = LOW
0 to 5.5
V
O
T
Operating Temperature
-40 to 85
°C
op
3/11
74ACT1284
DC ELECTRICAL CHARACTERISTICS
Test Condition
Value
= 25°C
T
Symbol
Parameter
-40 to 85°C Unit
A
V
CC
(V)
Min. Typ. Max. Min. Max.
V
High Level Input Voltage
Low Level Input Voltage
4.5 to 5.5
4.5 to 5.5
2.0
2.0
V
V
IH
V
0.8
0.8
0.4
IL
V
High Level Output Voltage
B Port
OHB
I
= -14mA
4.5
4.5
4.5
4.5
5.5
3.86
3.76
V
V
OH
V
High Level Output Voltage
A Port
I
= -50µA
4.4
4.4
OHA
O
I
= -4mA
3.86
3.76
O
V
V
Low Level Output Voltage
B Port
OLB
OLA
I
= 14mA
0.4
V
OH
Low Level Output Voltage
A Port
I
= 50µA
0.1
0.1
O
V
I
= 4mA
0.36
0.44
O
I
Input Current
V = V or GND
I CC
I
± 0.1
± 1
µA
(DIR,A5,A6,A7,HD)
V = V - 2.1V
I
Max I /Input
5.5
5.5
5.5
0.6
0.4
1.5
80
mA
µA
µA
CCT
CC
I
CC
I
Quiescent Supply Current
Output Leakage Current
V = V or GND
8
CC
I
CC
I
V
= V or GND
± 0.5
± 5
OZ
O
CC
I
B Side Power Down Leakage
Current
OFF
0
4
40
24
µA
V
= 5.25V
O
+
V
Input HysteresIs
5.0
5.0
0.35
V
HYS
V
V
= V
T
T
Z
Output Impedance B Port
= V
OH
8
Ω
O
B
AC ELECTRICAL CHARACTERISTICS (f = 1MHz, t = t = 2.5ns)
r
f
Test Condition
Value
T
= 25°C
Symbol
Parameter
-40 to 85°C Unit
A
V
CC
(V)
Min. Typ. Max. Min. Max.
t
Propagation Delay Time
A1 - A7 to B1 - B7
1
1
1
1
5.6
5.6
7.5
7.5
1
1
1
1
6.5
6.5
8.5
8.5
R =500Ω, C =50pF
PLH
L
L
4.5 to 5.5
4.5 to 5.5
ns
ns
(fig. 1-2)
t
PHL
t
Propagation Delay Time
B1 - B4 to A1 - A4
PLH
R =500Ω, C =50pF
L
L
(fig. 3)
t
PHL
t
Enable Delay Time
HD to B1 - B7
EN
1
1
7.5
7.5
1
1
8.5
8.5
ns
ns
R =33Ω, R =62Ω
S
L
4.5 to 5.5
4.5 to 5.5
C =50pF (fig. 2)
t
Disable Delay Time
HD to B1 - B7
L
DIS
t t
t
, t B1 - B7 Open Drain
R
=500Ω
r,
f
rise fall
PULL_UP
120
120
ns
C =50pF (fig. 4)
L
C
Control Input Capacitance
(HD, DIR, A5 - A7)
I
Open
5.0
4
pF
pF
C
I/O Pin Capacitance
12
I/O
4/11
74ACT1284
TEST CIRCUIT
TEST
(A1-A7 to B1-B7) R = 62Ω, R = 33Ω (see waveform 1)
S1
S2
S2
t
t
t
V
V
OPEN
CLOSED
CLOSED
CLOSED
OPEN
PHL
L
1
CC
CC
(A1-A7 to B1-B7) R = 62Ω (see waveform 1)
GND
GND
GND
GND
PLH
L
, t
(B1-B4 to A1-A4) R = 500Ω (see waveform 2)
L
PHL PLH
t , t (A1-A7 to B1-B7) R = 500Ω (see waveform 1)
V
V
r
f
L
CC
CC
t
t
(HD to B1-B7) R = 62Ω, R = 33Ω (see waveform 3)
GND
GND
GND
GND
EN
L
1
(HD to B1-B7) R = 62Ω (see waveform 3)
CLOSED
DIS
L
C
R
= 50 pF or equivalent (includes jig and probe capacitance)
L
T
= Z
of pulse generator (typically 50Ω)
OUT
Figure 1 : Propagation Delay Time
5/11
74ACT1284
Figure 2 : Propagation Delay Time
V
MO
= 50%V
CC
Figure 3 : Enable and Disable Time
6/11
74ACT1284
SO-20 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
2.65
0.2
MIN.
MAX.
0.104
0.008
0.096
0.019
0.012
A
a1
a2
b
0.1
0.004
2.45
0.49
0.32
0.35
0.23
0.014
0.009
b1
C
0.5
0.020
c1
D
45˚ (typ.)
12.60
10.00
13.00
10.65
0.496
0.393
0.512
0.419
E
e
1.27
0.050
0.450
e3
F
11.43
7.40
0.50
7.60
1.27
0.75
0.291
0.020
0.300
0.050
0.029
L
M
S
˚ (max.)
8
PO13L
7/11
74ACT1284
TSSOP20 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
1.2
MIN.
MAX.
0.047
0.006
0.041
0.012
0.0079
0.260
0.260
0.176
A
A1
A2
b
0.05
0.8
0.15
1.05
0.30
0.20
6.6
0.002
0.031
0.007
0.004
0.252
0.244
0.169
0.004
0.039
1
0.19
0.09
6.4
c
D
6.5
6.4
0.256
0.252
E
6.2
6.6
E1
e
4.3
4.4
4.48
0.173
0.65 BSC
0.0256 BSC
K
0˚
8˚
0˚
8˚
L
0.45
0.60
0.75
0.018
0.024
0.030
A2
A
K
L
b
e
A1
E
c
D
E1
PIN 1 IDENTIFICATION
1
0087225C
8/11
74ACT1284
Tape & Reel SO-20 MECHANICAL DATA
mm.
TYP
inch
TYP.
DIM.
MIN.
MAX.
330
MIN.
MAX.
12.992
0.519
A
C
12.8
20.2
60
13.2
0.504
0.795
2.362
D
N
T
30.4
11
1.197
0.433
0.528
0.130
0.161
0.476
Ao
Bo
Ko
Po
P
10.8
13.2
3.1
0.425
0.520
0.122
0.153
0.468
13.4
3.3
3.9
4.1
11.9
12.1
9/11
74ACT1284
Tape & Reel TSSOP20 MECHANICAL DATA
mm.
TYP
inch
TYP.
DIM.
MIN.
MAX.
330
MIN.
MAX.
12.992
0.519
A
C
12.8
20.2
60
13.2
0.504
0.795
2.362
D
N
T
22.4
7
0.882
0.276
0.280
0.075
0.161
0.476
Ao
Bo
Ko
Po
P
6.8
6.9
0.268
0.272
0.067
0.153
0.468
7.1
1.9
4.1
12.1
1.7
3.9
11.9
10/11
74ACT1284
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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11/11
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