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SCAS459D − NOVEMBER 1994 − REVISED OCTOBER 2003
SN54ACT1284 . . . J OR W PACKAGE
SN74ACT1284 . . . DB, DW, NS, OR PW PACKAGE
(TOP VIEW)
D
D
D
D
D
D
D
4.5-V to 5.5-V V
Operation
CC
Inputs Accept Voltages to 5.5 V
Max t of 20 ns at 5 V
pd
3-State Outputs Directly Drive Bus Lines
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A1
A2
A3
B1
B2
B3
B4
Flow-Through Architecture Optimizes PCB
Layout
A4
Center-Pin V
and GND Configurations
CC
GND
GND
A5
A6
A7
V
V
CC
CC
Minimize High-Speed Switching Noise
ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
B5
B6
B7
HD
D
Designed for the IEEE 1284-I (Level-1 Type)
and IEEE 1284-II (Level-2 Type) Electrical
Specifications
DIR
SN54ACT1284 . . . FK PACKAGE
(TOP VIEW)
description/ordering information
The ’ACT1284 devices are designed for
asynchronous two-way communication between
data buses. The control function minimizes
external timing requirements.
3
2
1 20 19
18
B3
B4
V
A4
GND
GND
A5
4
5
6
7
8
17
16
15
14
CC
The devices allow data transmission in either the
A-to-B or the B-to-A direction for bits 1, 2, 3, and
4, depending on the logic level at the
direction-control (DIR) input. Bits 5, 6, and 7,
however, always transmit in the A-to-B direction.
V
CC
B5
A6
9 10 11 12 13
The output drive for each mode is determined by the high-drive (HD) control pin. When HD is high, the high drive
is delivered by the totem-pole configuration, and when HD is low, the outputs are open drain. This meets the
drive requirements as specified in the IEEE 1284-I (level-1 type) and the IEEE 1284-II (level-2 type) parallel
peripheral-interface specification.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
Tube
SN74ACT1284DW
SN74ACT1284DWR
SN74ACT1284NSR
SN74ACT1284DBR
SN74ACT1284PW
SN74ACT1284PWR
SNJ54ACT1284J
SOIC − DW
ACT1284
Tape and reel
Tape and reel
Tape and reel
Tube
SOP − NS
ACT1284
AU284
0°C to 70°C
SSOP − DB
TSSOP − PW
AU284
Tape and reel
Tube
CDIP − J
CFP − W
LCCC − FK
SNJ54ACT1284J
SNJ54ACT1284W
SNJ54ACT1284FK
Tube
SNJ54ACT1284W
SNJ54ACT1284FK
−55°C to 125°C
Tube
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2003, Texas Instruments Incorporated
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1
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