SN54HCT245J [TI]
OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS; 八路总线收发器与3态输出
| 型号： | SN54HCT245J |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
| 文件： | 总16页 (文件大小：527K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54HCT245, SN74HCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS020E – MARCH 1984 – REVISED AUGUST 2003
SN54HCT245 . . . J OR W PACKAGE
SN74HCT245 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
Operating Voltage Range of 4.5 V to 5.5 V
High-Current 3-State Outputs Drive Bus
Lines Directly or Up To 15 LSTTL Loads
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DIR
A1
V
CC
Low Power Consumption, 80-µA Max I
Typical t = 14 ns
pd
6-mA Output Drive at 5 V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
A2
A3
Low Input Current of 1 µA Max
Inputs Are TTL-Voltage Compatible
A4
A5
A6
description/ordering information
A7
A8
These octal bus transceivers are designed for
asynchronous two-way communication between
data buses. The control-function implementation
minimizes external timing requirements.
GND
SN54HCT245 . . . FK PACKAGE
(TOP VIEW)
The ’HCT245 devices allow data transmission
from the Abus to the B bus or from the B bus to the
A bus, depending upon the logic level at the
direction-control (DIR) input. The output-enable
(OE) input can be used to disable the device so
that the buses are effectively isolated.
3
2
1
20 19
18
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
4
5
6
7
8
17
16
15
14
9 10 11 12 13
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP – N
Tube of 20
Tube of 25
Reel of 2000
Reel of 2000
Reel of 2000
Tube of 70
Reel of 2000
Reel of 250
Tube of 20
Tube of 85
Tube of 55
SN74HCT245N
SN74HCT245N
SN74HCT245DW
SN74HCT245DWR
SN74HCT245NSR
SN74HCT245DBR
SN74HCT245PW
SN74HCT245PWR
SN74HCT245PWT
SNJ54HCT245J
SOIC – DW
HCT245
SOP – NS
HCT245
HT245
–40°C to 85°C
SSOP – DB
TSSOP – PW
HT245
CDIP – J
CFP – W
LCCC – FK
SNJ54HCT245J
SNJ54HCT245W
SNJ54HCT245FK
–55°C to 125°C
SNJ54HCT245W
SNJ54HCT245FK
†
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 2003, 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
SN54HCT245, SN74HCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS020E – MARCH 1984 – REVISED AUGUST 2003
FUNCTION TABLE
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
I
Input clamp current, I (V < 0 or V > V ) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
IK
I
CC
Output clamp current, I
(V < 0 or V > V ) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
OK
O O CC
Continuous output current, I (V = 0 to V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 mA
Continuous current through V
O
O
CC
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 mA
Package thermal impedance, θ (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
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
SN54HCT245, SN74HCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS020E – MARCH 1984 – REVISED AUGUST 2003
recommended operating conditions (see Note 3)
SN54HCT245
SN74HCT245
MIN NOM MAX
UNIT
MIN NOM
MAX
V
V
V
V
V
Supply voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
IH
IL
I
High-level input voltage
Low-level input voltage
Input voltage
V
V
= 4.5 V to 5.5 V
= 4.5 V to 5.5 V
CC
0.8
0.8
V
CC
0
0
V
V
0
0
V
V
V
CC
CC
Output voltage
V
O
CC
CC
∆t/∆v
Input transition rise/fall time
Operating free-air temperature
500
125
500
85
ns
°C
T
A
–55
–40
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
= 25°C
SN54HCT245 SN74HCT245
A
PARAMETER
TEST CONDITIONS
V
UNIT
V
CC
MIN
TYP
MAX
MIN
4.4
MAX
MIN
4.4
MAX
I
I
I
I
= –20 µA
= –6 mA
= 20 µA
= 6 mA
4.4 4.499
OH
OH
OL
OL
V
V
V = V or V
IH
4.5 V
4.5 V
OH
I
IL
IL
3.98
4.3
0.001
0.17
0.1
3.7
3.84
0.1
0.26
100
0.5
8
0.1
0.4
0.1
0.33
1000
5
V = V or V
V
OL
I
IH
I
I
I
DIR or OE V = V
or 0
5.5 V
5.5 V
5.5 V
1000
10
nA
µA
µA
I
I
CC
A or B
V
O
= V or 0
CC
0.01
OZ
CC
V = V
I
or 0,
I
O
= 0
160
80
CC
One input at 0.5 V or 2.4 V,
Other inputs at 0 or V
†
5.5 V
1.4
3
2.4
10
3
2.9
10
mA
pF
∆I
CC
CC
4.5 V
to 5.5 V
‡
C
DIR or OE
10
i
†
‡
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
.
CC
Parameter C does not apply to transceiver I/O ports.
i
switching characteristics over recommended operating free-air temperature range, C = 50 pF
L
(unless otherwise noted) (see Figure 1)
T
A
= 25°C
TYP
16
SN54HCT245 SN74HCT245
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
V
UNIT
ns
CC
MIN
MAX
22
MIN
MAX
33
MIN
MAX
28
4.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
t
t
t
t
A or B
OE
B or A
A or B
A or B
A or B
pd
en
dis
t
14
20
30
25
25
46
69
58
ns
22
41
62
52
26
40
60
50
ns
OE
23
36
54
45
9
12
18
15
ns
8
11
16
14
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54HCT245, SN74HCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS020E – MARCH 1984 – REVISED AUGUST 2003
switching characteristics over recommended operating free-air temperature range, C = 150 pF
L
(unless otherwise noted) (see Figure 1)
T
A
= 25°C
TYP
20
SN54HCT245 SN74HCT245
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
V
UNIT
ns
CC
MIN
MAX
30
MIN
MAX
45
MIN
MAX
38
4.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
t
pd
t
en
t
t
A or B
OE
B or A
A or B
A or B
18
27
41
34
36
59
89
74
ns
30
53
80
67
17
42
63
53
ns
14
38
57
48
operating characteristics, T = 25°C
A
PARAMETER
TEST CONDITIONS
TYP
UNIT
C
Power dissipation capacitance per transceiver
No load
40
pF
pd
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54HCT245, SN74HCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS020E – MARCH 1984 – REVISED AUGUST 2003
PARAMETER MEASUREMENT INFORMATION
V
CC
PARAMETER
R
C
S1
S2
L
L
50 pF
or
150 pF
t
Open
Closed
Closed
Open
S1
S2
PZH
Test
Point
t
t
1 kΩ
1 kΩ
en
R
t
L
PZL
From Output
Under Test
t
t
Open
Closed
Open
PHZ
PLZ
50 pF
C
dis
L
Closed
(see Note A)
50 pF
or
150 pF
t
or t
––
Open
Open
pd
t
LOAD CIRCUIT
Input
3 V
2.7 V
2.7 V
1.3 V
0.3 V
1.3 V
0.3 V
0 V
t
t
r
f
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
3 V
0 V
Output
Control
(Low-Level
Enabling)
3 V
0 V
Input
1.3 V
1.3 V
1.3 V
1.3 V
t
t
PLH
PHL
90%
t
t
PLZ
PZL
V
V
OH
In-Phase
Output
≈V
CC
Output
Waveform 1
(See Note B)
90%
t
1.3 V
10%
1.3 V
10%
1.3 V
10%
t
OL
V
OL
OH
t
r
f
f
t
t
t
PHL
90%
PLH
PZH
PHZ
Out-of-
Phase
Output
V
V
OH
V
Output
Waveform 2
(See Note B)
90%
t
90%
1.3 V
10%
1.3 V
10%
1.3 V
OL
≈0 V
t
r
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES
NOTES: A.
C includes probe and test-fixture capacitance.
L
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. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, Z = 50 Ω, t = 6 ns, t = 6 ns.
O
r
f
D. The outputs are measured one at a time with one input transition per measurement.
E.
F.
G.
t
t
t
and t
and t
and t
are the same as t
are the same as t
are the same as t
.
dis
PLZ
PZL
PLH
PHZ
PZH
PHL
.
en
.
pd
Figure 1. Load Circuit and Voltage Waveforms
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
28-Feb-2005
PACKAGING INFORMATION
Orderable Device
Status (1)
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
CDIP
CFP
Drawing
5962-8550601VRA
5962-8550601VSA
85506012A
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
OBSOLETE
ACTIVE
J
W
FK
J
20
20
20
20
20
20
20
20
20
1
1
1
1
1
1
1
None
None
None
None
None
None
None
None
Call TI
Call TI
Call TI
Call TI
Call TI
Call TI
Call TI
Call TI
Level-NC-NC-NC
Level-NC-NC-NC
Level-NC-NC-NC
Level-NC-NC-NC
Level-NC-NC-NC
Level-NC-NC-NC
Level-NC-NC-NC
Call TI
LCCC
CDIP
CDIP
CFP
8550601RA
JM38510/65553BRA
JM38510/65553BSA
SN54HCT245J
J
W
J
CDIP
SSOP
SSOP
SN74HCT245DBLE
SN74HCT245DBR
DB
DB
2000
25
Pb-Free
(RoHS)
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
SN74HCT245DW
SN74HCT245DWR
SN74HCT245N
ACTIVE
ACTIVE
ACTIVE
SOIC
SOIC
PDIP
DW
DW
N
20
20
20
Pb-Free
(RoHS)
CU NIPDAU Level-2-250C-1 YEAR/
Level-1-235C-UNLIM
2000
20
Pb-Free
(RoHS)
CU NIPDAU Level-2-250C-1 YEAR/
Level-1-235C-UNLIM
Pb-Free
(RoHS)
CU NIPDAU Level-NC-NC-NC
SN74HCT245N3
OBSOLETE
ACTIVE
PDIP
SO
N
20
20
None
Call TI
Call TI
SN74HCT245NSR
NS
2000
70
Pb-Free
(RoHS)
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
SN74HCT245PW
ACTIVE
TSSOP
PW
20
Pb-Free
(RoHS)
CU NIPDAU Level-1-250C-UNLIM
SN74HCT245PWLE
SN74HCT245PWR
OBSOLETE TSSOP
PW
PW
20
20
None
Call TI
Call TI
ACTIVE
TSSOP
2000
250
Pb-Free
(RoHS)
CU NIPDAU Level-1-250C-UNLIM
SN74HCT245PWT
ACTIVE
TSSOP
PW
20
Pb-Free
(RoHS)
CU NIPDAU Level-1-250C-UNLIM
SNJ54HCT245FK
SNJ54HCT245J
SNJ54HCT245W
ACTIVE
ACTIVE
ACTIVE
LCCC
CDIP
CFP
FK
J
20
20
20
1
1
1
None
None
None
Call TI
Call TI
Call TI
Level-NC-NC-NC
Level-NC-NC-NC
Level-NC-NC-NC
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 - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional
product content details.
None: Not yet available Lead (Pb-Free).
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.
Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder
temperature.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
28-Feb-2005
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
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
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
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms
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相关型号：
SN54HCT273FKR
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