SN54LS245, SN74LS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDLS146A – OCTOBER 1976 – REVISED FEBRUAR Y 2002
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
TYPE
I
OL
(SINK
CURRENT)
I
OH
(SOURCE
CURRENT)
SN54LS245 12 mA –12 mA
SN74LS245 24 mA –15 mA
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.
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N Tube SN74LS245N SN74LS245N
Tube SN74LS245DW
0°C to 70°C
–
Tape and reel SN74LS245DWR
SOP – NS Tape and reel SN74LS245NSR 74LS245
SSOP – DB Tape and reel SN74LS245DBR LS245
Tube SN54LS245J SN54LS245J
°
°
–
Tube SNJ54LS245J SNJ54LS245J
–
CFP – W Tube SNJ54LS245W SNJ54LS245W
LCCC – FK Tube SN54LS245FK SN54LS245FK
†
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.
3 2 1 20 19
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
SN54LS245 . . . FK PACKAGE
(TOP VIEW)
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
SN54LS245 ...J OR W PACKAGE
SN74LS245 ... DB, DW, N, OR NS PACKAGE
(TOP VIEW)
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.
