Texas Instruments ABT245B

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Item Description:







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.

 
  
  
SCBS081L − JANUARY 1991 − REVISED APRIL 2005
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
D Typical V
OLP
(Output Ground Bounce)
<1 V at V
CC
= 5 V, T
A
= 25°C
D I
off
and Power-Up 3-State Support Hot
Insertion
D High-Drive Outputs (−32-mA I
OH
, 64-mA I
OL
)
D Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD 17
D ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
SN54ABT245A ...J OR W PACKAGE
SN74ABT245B . . . DB, DGV, DW, N, NS,
OR PW PACKAGE
(TOP VIEW)
3212019
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
A2
A1
DIR
B7
B6 OE
A8
GND
B8
V
CC
SN54ABT245B . . . 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
SN74ABT245B . . . RGY PACKAGE
(TOP VIEW)
120
10 11
2
3
4
5
6
7
8
9
19
18
17
16
15
14
13
12
OE
B1
B2
B3
B4
B5
B6
B7
A1
A2
A3
A4
A5
A6
A7
A8
DIR
B8
V
G
ND
CC
description/ordering information
These octal bus transceivers are designed for asynchronous communication between data buses. The devices
transmit 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. The output-enable (OE
) input can be used to disable the device so the buses are
effectively isolated.
ORDERING INFORMATION
T
A
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N Tube SN74ABT245BN SN74ABT245BN
QFN − RGY Tape and reel SN74ABT245BRGYR AB245B
SOIC − DW
Tube SN74ABT245BDW
ABT245B
SOIC − DW
Tape and reel SN74ABT245BDWR
ABT245B
SOP − NS Tape and reel SN74ABT245BNSR ABT245B
−40°C to 85°C
SSOP − DB Tape and reel SN74ABT245BDBR AB245B
−40 C to 85 C
TSSOP − PW
Tube SN74ABT245BPW
AB245B
TSSOP − PW
Tape and reel SN74ABT245BPWR
AB245B
TVSOP − DGV Tape and reel SN74ABT245BDGVR AB245B
VFBGA − GQN
Tape and reel
SN74ABT245BGQNR
AB245B
VFBGA − ZQN (Pb-free)
Tape and ree
l
SN74ABT245BZQNR
AB245B
CDIP − J Tube SNJ54ABT245AJ SNJ54ABT245AJ
−55°C to 125°C
CFP − W Tube SNJ54ABT245AW SNJ54ABT245AW
−55 C to 125 C
LCCC − FK Tube SNJ54ABT245AFK SNJ54ABT245AFK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available
at www.ti.com/sc/package.
Copyright 2005, Texas Instruments Incorporated
  ! " #$%! "  &$'(#! )!%*
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!%"!/  (( &%!%"*
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.
 &)$#!" #&(! ! 012 (( &%!%" % !%"!%)
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 
  
  
SCBS081L − JANUARY 1991 − REVISED APRIL 2005
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
description/ordering information (continued)
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.
This device is fully specified for hot-insertion applications using I
off
and power-up 3-state. The I
off
circuitry
disables the outputs, preventing damaging current backflow through the device when it is powered down. The
power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
terminal assignments
1234
A A1
DIR V
CC
OE
B A3 B2 A2 B1
C A5 A4 B4 B3
D A7 B6 A6 B5
E GND A8 B8 B7
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 (positive logic)
DIR
OE
A1
B1
To Seven Other Channels
1
2
19
18
Pin numbers shown are for the DB, DGV, DW, FK, J, N, NS, PW, RGY, and W packages.
SN74ABT245B . . . GQN OR ZQN PACKAGE
(TOP VIEW)
1234
A
B
C
D
E
 
  
  
SCBS081L − JANUARY 1991 − REVISED APRIL 2005
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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
(except I/O ports) (see Note 1) −0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high or power-off state, V
O
−0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . .
Current into any output in the low state, I
O
: SN54ABT245A 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ABT245B 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0) −18 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0) −50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Note 2): DB package 70°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 2): DGV package 92°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 2): DW package 58°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 2): GQN/ZQN package 78°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 2): N package 69°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 2): NS package 60°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 2): PW package 83°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 3): RGY package 37°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 negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
3. The package thermal impedance is calculated in accordance with JESD 51-5.
recommended operating conditions (see Note 4)
SN54ABT245A SN74ABT245B
UNIT
MIN MAX MIN MAX
UNIT
V
CC
Supply voltage 4.5 5.5 4.5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.8 0.8 V
V
I
Input voltage 0 V
CC
0 V
CC
V
I
OH
High-level output current −24 −32 mA
I
OL
Low-level output current 48 64 mA
t/v Input transition rise or fall rate 5 5 ns/V
t/V
CC
Power-up ramp rate 200 µs/V
T
A
Operating free-air temperature −55 125 −40 85 °C
NOTE 4: 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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