SN54LS245, SN74LS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDLS146A – OCTOBER 1976 – REVISED FEBRUARY 2002
D
D
D
D
3-State Outputs Drive Bus Lines Directly
PNP Inputs Reduce dc Loading on Bus
Lines
Hysteresis at Bus Inputs Improves Noise
Margins
Typical Propagation Delay Times Port to
Port, 8 ns
IOL
(SINK
CURRENT)
12 mA
24 mA
IOH
(SOURCE
CURRENT)
–12 mA
–15 mA
SN54LS245 . . . J OR W PACKAGE
SN74LS245 . . . DB, DW, N, OR NS PACKAGE
(TOP VIEW)
TYPE
SN54LS245
SN74LS245
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
description
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 on the logic level at the
direction-control (DIR) input. The output-enable
(OE) input can disable the device so that the
buses are effectively isolated.
SN54LS245 . . . FK PACKAGE
(TOP VIEW)
A2
A1
DIR
VCC
OE
A3
A4
A5
A6
A7
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
B1
B2
B3
B4
B5
ORDERING INFORMATION
TA
PDIP – N
SOIC – DW
0°C to 70°C
SOP – NS
SSOP – DB
CDIP – J
–55°C to 125°C
CFP – W
LCCC – FK
PACKAGE†
Tube
Tube
Tape and reel
Tape and reel
Tape and reel
Tube
Tube
Tube
Tube
ORDERABLE
PART NUMBER
SN74LS245N
SN74LS245DW
SN74LS245DWR
SN74LS245NSR
SN74LS245DBR
SN54LS245J
SNJ54LS245J
SNJ54LS245W
SN54LS245FK
74LS245
LS245
SN54LS245J
SNJ54LS245J
SNJ54LS245W
SN54LS245FK
TOP-SIDE
MARKING
SN74LS245N
LS245
† 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
2002, Texas Instruments Incorporated
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.
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.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
A8
GND
B8
B7
B6
1
TI [ TEXAS INSTRUMENTS ]
