SN54ACT245 [TI]
OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS; 八路总线收发器与3态输出
| 型号： | SN54ACT245 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
| 文件： | 总15页 (文件大小：510K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54ACT245, SN74ACT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS452E – SEPTEMBER 1994 – REVISED OCTOBER 2002
4.5-V to 5.5-V V
Operation
Max t of 8 ns at 5 V
pd
CC
Inputs Accept Voltages to 5.5 V
Inputs Are TTL-Voltage Compatible
SN54ACT245 . . . J OR W PACKAGE
SN74ACT245 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
SN54ACT245 . . . FK PACKAGE
(TOP VIEW)
DIR
A1
A2
A3
A4
A5
A6
A7
A8
V
CC
1
2
3
4
5
6
7
8
9
20
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
3
2
1
20 19
18
4
5
6
7
8
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
17
16
15
14
9 10 11 12 13
GND 10
description/ordering information
These 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 upon 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 through a pullup
CC
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP – N
Tube
SN74ACT245N
SN74ACT245N
Tube
SN74ACT245DW
SN74ACT245DWR
SN74ACT245NSR
SN74ACT245DBR
SN74ACT245PWR
SNJ54ACT245J
SNJ54ACT245W
SNJ54ACT245K
SOIC – DW
ACT245
Tape and reel
Tape and reel
Tape and reel
Tape and reel
Tube
–40°C to 85°C
SOP – NS
SSOP – DB
TSSOP – PW
CDIP – J
ACT245
AD245
AD245
SNJ54ACT245J
SNJ54ACT245W
SNJ54ACT245FK
–55°C to 125°C
CFP – W
Tube
LCCC – FK
Tube
†
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ACT245, SN74ACT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS452E – SEPTEMBER 1994 – REVISED OCTOBER 2002
FUNCTION TABLE
(each transceiver)
INPUTS
OPERATION
OE
L
DIR
L
B data to A bus
A data to B bus
Isolation
L
H
H
X
logic diagram (positive logic)
1
DIR
19
18
OE
B1
2
A1
To Seven Other Channels
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
CC
Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
+ 0.5 V
+ 0.5 V
I
CC
CC
Output voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
O
Input clamp current, I (V < 0 or V > V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
IK
I
I
CC
Output clamp current, I
(V < 0 or V > V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
OK
O O CC
Continuous output current, I (V = 0 to V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous current through V
Package thermal impedance, θ (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
O
O
CC
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±200 mA
JA
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
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.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ACT245, SN74ACT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS452E – SEPTEMBER 1994 – REVISED OCTOBER 2002
recommended operating conditions (see Note 3)
SN54ACT245 SN74ACT245
UNIT
MIN
4.5
2
MAX
MIN
4.5
2
MAX
V
V
V
V
V
Supply voltage
5.5
5.5
V
V
CC
IH
IL
High-level input voltage
Low-level input voltage
Input voltage
0.8
0.8
V
0
0
V
V
0
0
V
V
V
I
CC
CC
Output voltage
V
O
CC
CC
I
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
–24
24
–24
24
8
mA
mA
ns/V
°C
OH
I
OL
t/ v
8
T
–55
125
–40
85
A
NOTE 3: All unused inputs of the device must be held at V
or GND to ensure proper device operation. Refer to the TI application report
CC
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
T
A
= 25°C
TYP
SN54ACT245 SN74ACT245
PARAMETER
TEST CONDITIONS
V
UNIT
CC
MIN
4.4
MAX
MIN
4.4
MAX
MIN
4.4
MAX
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
4.49
I
I
= –50
A
OH
5.4
5.49
5.4
5.4
3.88
4.86
3.7
3.76
4.76
V
OH
= –24 mA
V
OH
4.7
†
†
I
I
= –50 mA
= –75 mA
3.85
OH
3.85
OH
0.001
0.001
0.1
0.1
0.1
0.1
0.1
0.1
I
= 50 A
OL
OL
0.36
0.36
0.5
0.44
0.44
V
OL
I
= 24 mA
V
0.5
†
†
I
I
= 50 mA
1.65
OL
= 75 mA
1.65
±5
OL
‡
I
I
I
A or B ports
OE or DIR
V
= V or GND
CC
±0.5
±0.1
4
±10
±1
A
A
A
OZ
O
V = V
or GND
or GND,
±1
I
I
CC
CC
V = V
I = 0
O
80
40
CC
I
One input at 3.4 V,
Other inputs at GND or V
§
5.5 V
0.6
1.6
1.5
mA
I
CC
CC
C
C
V = V
or GND
5 V
5 V
4.5
15
pF
pF
i
I
CC
= V or GND
CC
V
O
io
†
‡
§
Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.
For I/O ports, the parameter I includes the input leakage current.
This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or V
OZ
.
CC
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ACT245, SN74ACT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS452E – SEPTEMBER 1994 – REVISED OCTOBER 2002
switching characteristics over recommended operating free-air temperature range,
V
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
CC
T = 25°C
A
SN54ACT245 SN74ACT245
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
ns
MIN
1
TYP
4
MAX
7.5
8
MIN
1
MAX
9
MIN
1.5
1
MAX
8
t
t
t
t
t
t
PLH
PHL
PZH
PZL
PHZ
PLZ
A or B
B or A
A or B
A or B
1
4
1
10
12
13
12
12
9
1
5
10
1
1.5
1.5
1
11
12
11
11
ns
OE
OE
1
5.5
5.5
5
10
1
1
10
1
ns
1
10
1
1.5
operating characteristics, V
= 5 V, T = 25°C
A
CC
PARAMETER
TEST CONDITIONS
TYP
UNIT
C
Power dissipation capacitance
C
= 50 pF,
f = 1 MHz
45
pF
pd
L
PARAMETER MEASUREMENT INFORMATION
2 × V
CC
Open
TEST
S1
S1
500 Ω
t
/t
Open
From Output
Under Test
PLH PHL
t
/t
2 × V
CC
Open
PLZ PZL
t
/t
PHZ PZH
C
= 50 pF
L
500 Ω
(see Note A)
Output
Control
(low-level
enabling)
3 V
0 V
1.5 V
1.5 V
LOAD CIRCUIT
t
t
PLZ
PZL
Output
Waveform 1
3 V
0 V
≈V
CC
Input
1.5 V
1.5 V
50% V
CC
S1 at 2 × V
(see Note B)
CC
V + 0.3 V
OL
V
OL
t
t
PHL
PLH
t
t
PZH
PHZ
Output
Waveform 2
S1 at Open
(see Note B)
V
V
OH
OH
V
OH
– 0.3 V
50% V
CC
50% V
50% V
Output
CC
CC
V
OL
≈0 V
VOLTAGE WAVEFORMS
C includes probe and jig capacitance.
L
VOLTAGE WAVEFORMS
NOTES: A.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, Z = 50 Ω, t ≤ 2.5 ns, t ≤ 2.5 ns.
O
r
f
D. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
6-Dec-2006
PACKAGING INFORMATION
Orderable Device
Status (1)
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
LCCC
CDIP
CFP
Drawing
5962-8766301M2A
5962-8766301MRA
5962-8766301MSA
5962-8766301SRA
5962-8766301SSA
SN74ACT245DBLE
SN74ACT245DBR
ACTIVE
ACTIVE
FK
J
20
20
20
20
20
20
20
1
1
1
1
1
TBD
TBD
TBD
TBD
TBD
TBD
POST-PLATE N / A for Pkg Type
A42 SNPB
A42
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
Call TI
ACTIVE
W
J
ACTIVE
CDIP
CFP
A42 SNPB
A42
ACTIVE
W
DB
DB
OBSOLETE
ACTIVE
SSOP
SSOP
Call TI
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SN74ACT245DBRE4
SN74ACT245DW
SN74ACT245DWE4
SN74ACT245DWR
SN74ACT245DWRE4
SN74ACT245N
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
SSOP
SOIC
SOIC
SOIC
SOIC
PDIP
PDIP
SO
DB
DW
DW
DW
DW
N
20
20
20
20
20
20
20
20
20
20
20
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
25 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
25 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
20
Pb-Free
(RoHS)
CU NIPDAU N / A for Pkg Type
SN74ACT245NE4
SN74ACT245NSR
SN74ACT245NSRG4
SN74ACT245PW
N
20
Pb-Free
(RoHS)
CU NIPDAU N / A for Pkg Type
NS
NS
PW
PW
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SO
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
TSSOP
TSSOP
70 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SN74ACT245PWE4
70 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SN74ACT245PWLE
SN74ACT245PWR
OBSOLETE TSSOP
PW
PW
20
20
TBD
Call TI
Call TI
ACTIVE
TSSOP
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SN74ACT245PWRE4
ACTIVE
TSSOP
PW
20
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SNJ54ACT245FK
SNJ54ACT245J
SNJ54ACT245W
ACTIVE
ACTIVE
ACTIVE
LCCC
CDIP
CFP
FK
J
20
20
20
1
1
1
TBD
TBD
TBD
POST-PLATE N / A for Pkg Type
A42 SNPB
A42
N / A for Pkg Type
N / A for Pkg Type
W
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
6-Dec-2006
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 2
MECHANICAL DATA
MLCC006B – OCTOBER 1996
FK (S-CQCC-N**)
LEADLESS CERAMIC CHIP CARRIER
28 TERMINAL SHOWN
A
B
NO. OF
TERMINALS
**
18 17 16 15 14 13 12
MIN
MAX
MIN
MAX
0.342
(8,69)
0.358
(9,09)
0.307
(7,80)
0.358
(9,09)
19
20
11
10
9
20
28
44
52
68
84
0.442
(11,23)
0.458
(11,63)
0.406
(10,31)
0.458
(11,63)
21
B SQ
22
0.640
(16,26)
0.660
(16,76)
0.495
(12,58)
0.560
(14,22)
8
A SQ
23
0.739
(18,78)
0.761
(19,32)
0.495
(12,58)
0.560
(14,22)
7
24
25
6
0.938
(23,83)
0.962
(24,43)
0.850
(21,6)
0.858
(21,8)
5
1.141
(28,99)
1.165
(29,59)
1.047
(26,6)
1.063
(27,0)
26 27 28
1
2
3
4
0.080 (2,03)
0.064 (1,63)
0.020 (0,51)
0.010 (0,25)
0.020 (0,51)
0.010 (0,25)
0.055 (1,40)
0.045 (1,14)
0.045 (1,14)
0.035 (0,89)
0.045 (1,14)
0.035 (0,89)
0.028 (0,71)
0.022 (0,54)
0.050 (1,27)
4040140/D 10/96
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a metal lid.
D. The terminals are gold plated.
E. Falls within JEDEC MS-004
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001
DB (R-PDSO-G**)
PLASTIC SMALL-OUTLINE
28 PINS SHOWN
0,38
0,22
0,65
28
M
0,15
15
0,25
0,09
5,60
5,00
8,20
7,40
Gage Plane
1
14
0,25
A
0°–ā8°
0,95
0,55
Seating Plane
0,10
2,00 MAX
0,05 MIN
PINS **
14
16
20
24
28
30
38
DIM
6,50
5,90
6,50
5,90
7,50
8,50
7,90
10,50
9,90
10,50 12,90
A MAX
A MIN
6,90
9,90
12,30
4040065 /E 12/01
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-150
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999
PW (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0,30
0,19
M
0,10
0,65
14
8
0,15 NOM
4,50
4,30
6,60
6,20
Gage Plane
0,25
1
7
0°–8°
A
0,75
0,50
Seating Plane
0,10
0,15
0,05
1,20 MAX
PINS **
8
14
16
20
24
28
DIM
3,10
2,90
5,10
4,90
5,10
4,90
6,60
6,40
7,90
9,80
9,60
A MAX
A MIN
7,70
4040064/F 01/97
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-153
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
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enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
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TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
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www.ti.com/digitalcontrol
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logic.ti.com
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power.ti.com
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Security
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www.ti.com/security
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microcontroller.ti.com
Low Power Wireless www.ti.com/lpw
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