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SN74ALS245ADWR

Part # SN74ALS245ADWR
Description OCTAL BUS TRANSCEIVER - Tapeand Reel
Category IC
Availability Out of Stock
Qty 0
Qty Price
1 + $0.08774

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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

SN54ALS245A, SN54AS245, SN74ALS245A, SN74AS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDAS272A – NOVEMBER 1994 – REVISED JANUARY 2003
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
4.5-V to 5.5-V V
CC
Operation
Max t
pd
of 5.5 ns at 5 V
3-State Outputs Drive Bus Lines Directly
pnp Inputs Reduce dc Loading
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
SN54ALS245A ...J OR W PACKAGE
SN54AS245 ...J PACKAGE
SN74ALS245A . . . DB, DW, N, OR NS PACKAGE
SN74AS245 ...DW, N, OR NS PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
A2
A1
DIR
B7
B6
OE
A8
GND
B8
V
CC
SN54ALS245A, SN54AS245 . . . FK PACKAGE
(TOP VIEW)
description/ordering information
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SN74ALS245A-1N SN74ALS245A-1N
PDIP – N Tube
SN74ALS245AN SN74ALS245AN
SN74AS245N SN74AS245N
Tube SN74ALS245ADW
ALS245A
Tape and reel SN74ALS245ADWR
ALS245A
SOIC DW
Tube SN74ALS245A-1DW
ALS245A 1
0°C to 70°C
SOIC
–
DW
Tape and reel SN74ALS245A-1DWR
ALS245A
-
1
Tube SN74AS245DW
AS245
Tape and reel SN74AS245DWR
AS245
Tape and reel SN74ALS245ANSR ALS245A
SOP – NS
Tape and reel SN74ALS245A-1NSR ALS245A-1
Tape and reel SN74AS245NSR 74AS245
SSOP – DB Tape and reel SN74ALS245ADBR G245A
CDIP J
Tube
SNJ54ALS245AJ SNJ54ALS245AJ
CDIP
–
J
Tube
SNJ54AS245J SNJ54AS245J
–55°C to 125°C
CFP – W Tube SNJ54ALS245AW SNJ54ALS245AW
LCCC FK
Tube
SNJ54ALS245AFK SNJ54ALS245AFK
LCCC
–
FK
Tube
SNJ54AS245FK SNJ54AS245FK
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.
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
Copyright 2003, Texas Instruments Incorporated
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.
SN54ALS245A, SN54AS245, SN74ALS245A, SN74AS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDAS272A – NOVEMBER 1994 – REVISED JANUARY 2003
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description/ordering information(continued)
These octal bus transceivers are designed for asynchronous two-way communication between data buses. The
control-function implementation minimizes external timing requirements.
The devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon
the logic level at the direction-control (DIR) input. The output-enable (OE
) input can be used to disable the
device so that the buses are effectively isolated.
The -1 version of the SN74ALS245A is identical to the standard version, except that the recommended
maximum I
OL
is increased to 48 mA. There is no -1 version of the SN54ALS245A.
FUNCTION TABLE
INPUTS
OPERATION
OE DIR
OPERATION
L L B data to A bus
L H A data to B bus
H X Isolation
logic diagram, each gate (positive logic)
DIR
OE
A1
B1
1
2
18
19
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (SN54ALS245A,
SN74ALS245A) (unless otherwise noted)
†
Supply voltage, V
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
: All inputs 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O ports 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Note 1): DB package 70°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package 58°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 69°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NS package 60°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” 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.
NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7.
SN54ALS245A, SN54AS245, SN74ALS245A, SN74AS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDAS272A – NOVEMBER 1994 – REVISED JANUARY 2003
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 2)
SN54ALS245A SN74ALS245A
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.7 0.8 V
I
OH
High-level output current –12 –15 mA
I
OL
Low level out
p
ut current
12 24
mA
I
OL
Low
-
level
output
current
48
†
mA
T
A
Operating free-air temperature –55 125 0 70 °C
†
Applies only to the -1 version and only if V
CC
is between 4.75 V and 5.25 V
NOTE 2: All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
SN54ALS245A SN74ALS245A
UNIT
PARAMETER
MIN TYP
‡
MAX MIN TYP
‡
MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.5 –1.5 V
V
CC
= 4.5 V to 5.5 V, I
OH
= –0.4 mA V
CC
–2 V
CC
–2
V
OH
I
OH
= –3 mA 2.4 3.2 2.4 3.2
V
V
OH
V
CC
= 4.5 V
I
OH
= –12 mA 2
V
I
OH
= –15 mA 2
I
OL
= 12 mA 0.25 0.4 0.25 0.4
V
OL
V
CC
= 4.5 V
I
OL
= 24 mA
0.35 0.5
V
I
OL
= 48 mA
†
0.35 0.5
I
I
Control inputs
V
CC
=55V
V
I
= 7 V 0.1 0.1
mA
I
I
A or B ports
V
CC
=
5
.
5
V
V
I
= 5.5 V 0.1 0.1
mA
I
IH
Control inputs
V
CC
=55V
V
I
=27V
20 20
µA
I
IH
A or B ports
§
V
CC
=
5
.
5
V
,
V
I
=
2
.
7
V
20 20
µ
A
I
IL
Control inputs
V
CC
=55V
V
I
=04V
–0.1 –0.1
mA
I
IL
A or B ports
§
V
CC
=
5
.
5
V
,
V
I
=
0
.
4
V
–0.1 –0.1
mA
I
O
V
CC
= 5.5 V, V
O
= 2.25 V –20 –112 –30 –112 mA
Outputs high 30 48 30 45
I
CC
V
CC
= 5.5 V
Outputs low 36 60 36 55
mA
Outputs disabled 38 63 38 58
†
Applies only to the -1 version and only if V
CC
is between 4.75 V and 5.25 V
‡
All typical values are V
CC
= 5 V, T
A
= 25°C.
§
For I/O ports, the parameters I
IH
and I
IL
include the off-state output current.
The output conditions have been chosen to produce a current that closely approximates one-half of the true short-circuit output current, I
OS
.
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