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SN74AC245PWR

Part # SN74AC245PWR
Description OCTAL TRANSCEIVER - Tape andReel
Category IC
Availability Out of Stock
Qty 0
Qty Price
1 + $0.27136

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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.

 
  
  
SCAS461F − FEBRUARY 1995 − REVISED OCTOBER 2003
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D 2-V to 6-V V
CC
Operation
D Inputs Accept Voltages to 6 V
D Max t
pd
of 7 ns at 5 V
description/ordering information
The ’AC245 octal bus transceivers are designed
for asynchronous two-way communication
between data buses. The control-function
implementation minimizes external timing
requirements.
When the output-enable (OE
) is low, the device
passes noninverted data 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.
A high on
OE disables the device so that the buses
are effectively isolated.
To ensure the high-impedance state during power
up or power down, OE
should be tied to V
CC
through a pullup resistor; the minimum value of
the resistor is determined by the current-sinking
capability of the driver.
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N Tube SN74AC245N SN74AC245N
SOIC − DW
Tube SN74AC245DW
AC245
SOIC − DW
Tape and reel SN74AC245DWR
AC245
−40°C to 85°C
SOP − NS Tape and reel SN74AC245NSR AC245
−40 C to 85 C
SSOP − DB Tape and reel SN74AC245DBR AC245
TSSOP − PW
Tube SN74AC245PW
AC245
TSSOP − PW
Tape and reel SN74AC245PWR
AC245
CDIP − J Tube SNJ54AC245J SNJ54AC245J
−55°C to 125°C
CFP − W Tube SNJ54AC245W SNJ54AC245W
−55 C to 125 C
LCCC − FK Tube SNJ54AC245FK SNJ54AC245FK
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Copyright 2003, Texas Instruments Incorporated
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!%"!/  (( &%!%"*
SN54AC245 ...J OR W PACKAGE
SN74AC245 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
3 2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
SN54AC245...FK PACKAGE
(TOP VIEW)
A2
A1
DIR
B7
B6 OE
A8
G
ND
B8
V
CC
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
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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 
  
  
SCAS461F − FEBRUARY 1995 − REVISED OCTOBER 2003
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
OPERATION
L
L
H
L
H
X
B data to A bus
A data to B bus
Isolation
logic diagram (positive logic)
DIR
OE
A1
B1
1
2
18
19
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
−0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1) −0.5 V to V
CC
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
(see Note 1) −0.5 V to V
CC
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(V
O
= 0 to V
CC
) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CC
or GND ±200 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Note 2): DB package 70°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package 58°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 69°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NS package 60°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package 83°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
−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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
 
  
  
SCAS461F − FEBRUARY 1995 − REVISED OCTOBER 2003
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
SN54AC245 SN74AC245
UNIT
MIN MAX MIN MAX
UNIT
V
CC
Supply voltage 2 6 2 6 V
V
CC
= 3 V 2.1 2.1
V
IH
High-level input voltage
V
CC
= 4.5 V
3.15 3.15
V
V
IH
V
CC
= 5.5 V 3.85 3.85
V
V
CC
= 3 V 0.9 0.9
V
IL
Low-level input voltage
V
CC
= 4.5 V
1.35 1.35
V
V
IL
V
CC
= 5.5 V 1.65 1.65
V
V
I
Input voltage 0 V
CC
0 V
CC
V
V
O
Output voltage 0 V
CC
0 V
CC
V
V
CC
= 3 V −12 −12
I
OH
High-level output current
V
CC
= 4.5 V
−24 −24
mA
I
OH
V
CC
= 5.5 V −24 −24
mA
V
CC
= 3 V 12 12
I
OL
Low-level output current
V
CC
= 4.5 V
24 24
mA
I
OL
V
CC
= 5.5 V 24 24
mA
Dt/Dv Input transition rise or fall rate 8 8 ns/V
T
A
Operating free-air temperature −55 125 −40 85 °C
NOTE 3: 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.
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