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ꢇ ꢋ ꢌꢍꢎ ꢏ ꢍꢐꢀ ꢎꢁ ꢏꢑ ꢒꢓꢔ ꢆꢑ
SCAS583J − NOVEMBER 1996 − REVISED FEBRUARY 2005
DGG OR DL PACKAGE
(TOP VIEW)
D
D
D
1.4-kΩ Pullup Resistors Integrated on All
Open-Drain Outputs Eliminate the Need for
Discrete Resistors
HD
A9
1
48 DIR
47 Y9
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
2
A10
A11
A12
A13
3
46 Y10
45 Y11
4
Designed for the IEEE Std 1284-I (Level 1
Type) and IEEE Std 1284-II (Level 2 Type)
Electrical Specifications
5
44
Y12
6
43 Y13
7
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
V
V
CABLE
CC
CC
A1
D
D
Flow-Through Architecture Optimizes PCB
Layout
8
B1
B2
GND
B3
B4
B5
B6
GND
B7
B8
9
A2
GND
A3
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin-Shrink
Small-Outline (DGG) Packages
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
A4
A5
A6
description/ordering information
GND
A7
The SN74LVC161284 is designed for 3-V to 3.6-V
V
operation.
This
device
provides
CC
A8
asynchronous two-way communication between
data buses. The control-function implementation
minimizes external timing requirements.
V
V
CABLE
CC
CC
PERI LOGIC IN
PERI LOGIC OUT
C14
C15
C16
A14
A15
A16
A17
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 SN74LVC161284
has one receiver dedicated to the HOST LOGIC
line and a driver to drive the PERI LOGIC line.
C17
HOST LOGIC OUT
HOST LOGIC IN
The output drive mode is determined by the high-drive (HD) control pin. When HD is high, the 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
CABLE. If V
CABLE is off, PERI LOGIC OUT is set to low.
CC
CC
The device has two supply voltages. V
is designed for 3-V to 3.6-V operation. V
CABLE supplies the inputs
CC
CC
and output buffers of the cable side only and is designed for 3-V to 3.6-V and for 4.7-V to 5.5-V operation. Even
when V CABLE is 3 V to 3.6 V, the cable-side I/O pins are 5-V tolerant.
CC
The SN74LVC161284 is characterized for operation from 0°C to 70°C.
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.
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Copyright 2005 Texas Instruments Incorporated
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1
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