SN74LV161284
19-BIT BUS INTERFACE


SCLS426C – OCTOBER 1998 – REVISED NOVEMBER 2002
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C0068 4.5-V to 5.5-V V
CC
Operation
C0068 1.4-kΩ Pullup Resistors Integrated on All
Open-Drain Outputs Eliminate the Need for
Discrete Resistors
C0068 Designed for IEEE Std 1284-I (Level-1 Type)
and IEEE Std 1284-II (Level-2 Type)
Electrical Specifications
C0068 Flow-Through Architecture Optimizes PCB
Layout
C0068 Latch-Up Performance Exceeds 250 mA Per
JEDEC 17
C0068 ESD Protection Exceeds JESD 22
– 4000-V Human-Body Model (A114-A)
– 300-V Machine Model (A115-A)
– 2000-V Charged-Device Model (C101)
description/ordering information
The SN74LV161284 is designed for 4.5-V to
5.5-V V
CC
operation. This device provides
asynchronous two-way communication between
data buses. The control-function implementation
minimizes external timing requirements.
This device has eight bidirectional bits; data can
flow in the A-to-B direction when DIR is high, and
in the B-to-A direction when DIR is low. This
device also has five drivers, which drive the cable
side, and four receivers. The SN74LV161284 has
one receiver dedicated to the HOST LOGIC line
and a driver to drive the PERI LOGIC line.
The output drive mode is determined by the high-drive (HD) control pin. When HD is high, the B, Y, and
PERI LOGIC OUT outputs are in a totem-pole configuration, and in an open-drain configuration when HD is low.
This meets the drive requirements as specified in the IEEE Std 1284-I (level-1 type) and IEEE Std 1284-II
(level-2 type) parallel peripheral-interface specifications. Except for HOST LOGIC IN and PERI LOGIC OUT,
all cable-side pins have a 1.4-kΩ integrated pullup resistor. The pullup resistor is switched off if the associated
output driver is in the low state or if the output voltage is above V
CC
CABLE. If V
CC
CABLE is off,
PERI LOGIC OUT is set to low.
The device has two supply voltages. V
CC
is designed for 4.5-V to 5.5-V operation. V
CC
CABLE supplies the
output buffers of the cable side only and is designed for 4.5-V to 5.5-V operation.
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SSOP DL
Tube SN74LV161284DL
LV161284
–40°C to 85°C
–
Tape and reel SN74LV161284DLR
TSSOP – DGG Tape and reel SN74LV161284DGGR LV161284
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Copyright  2002, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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.
DGG OR DL PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
HD
A9
A10
A11
A12
A13
V
CC
A1
A2
GND
A3
A4
A5
A6
GND
A7
A8
V
CC
PERI LOGIC IN
A14
A15
A16
A17
HOST LOGIC OUT
DIR
Y9
Y10
Y11
Y12
Y13
V
CC
CABLE
B1
B2
GND
B3
B4
B5
B6
GND
B7
B8
V
CC
CABLE
PERI LOGIC OUT
C14
C15
C16
C17
HOST LOGIC IN