SN74F245NE4 [TI]
八路总线收发器 | N | 20 | 0 to 70;
| 型号： | SN74F245NE4 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 八路总线收发器 | N | 20 | 0 to 70 驱动 光电二极管 逻辑集成电路 触发器 总线驱动器 总线收发器 |
| 文件： | 总7页 (文件大小：100K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
SN54F245 . . . J PACKAGE
SN74F245 . . . DB, DW, OR N PACKAGE
(TOP VIEW)
• 3-State Outputs Drive Bus Lines Directly
• Package Options Include Plastic
Small-Outline (SOIC) and Shrink
Small-Outline (SSOP) Packages, Ceramic
Chip Carriers, and Plastic and Ceramic
DIPs
DIR
A1
A2
A3
A4
A5
A6
A7
A8
V
CC
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
OE
B1
B2
B3
B4
B5
description
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 upon the logic level at the
direction-control (DIR) input. The output enable
(OE)inputcanbeusedtodisablethedevicesothe
buses are effectively isolated.
13 B6
12 B7
11 B8
GND 10
SN54F245 . . . FK PACKAGE
(TOP VIEW)
The SN74F245 is available in TI’s shrink
small-outline package (DB), which provides the
same I/O pin count and functionality of standard
small-outline packages in less than half the
printed-circuit-board area.
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
The SN54F245 is characterized for operation over
the full military temperature range of –55°C to
125°C. The SN74F245 is characterized for
operation from 0°C to 70°C.
9 10 11 12 13
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
L
L
L
B data to A bus
A data to B bus
Isolation
H
H
X
Copyright 1993, 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.
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
†
logic symbol
logic diagram (positive logic)
19
1
DIR
G3
OE
1
DIR
3EN1[BA]
3EN2[AB]
19
18
OE
B1
2
18
A1
B1
1
2
A1
2
3
4
5
6
7
8
9
17
16
15
14
13
12
11
A2
A3
A4
A5
A6
A7
A8
B2
B3
B4
B5
B6
B7
B8
To Seven Other Channels
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
‡
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 (except I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.2 V to 7 V
I
Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA to 5 mA
Voltage range applied to any output in the disabled or power-off state . . . . . . . . . . . . . . . . . . . –0.5 V to 5.5 V
Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
CC
Current into any output in the low state: SN54F245 (A1 thru A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA
SN54F245 (B1 thru B8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74F245 (A1 thru A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA
SN74F245 (B1 thru B8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54F245 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
SN74F245 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
recommended operating conditions
SN54F245
MIN NOM
SN74F245
UNIT
MAX
MIN NOM
MAX
V
V
V
Supply voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
IH
IL
High-level input voltage
Low-level input voltage
Input clamp current
0.8
–18
– 3
0.8
–18
– 3
– 15
24
V
I
IK
mA
A1 thru A8
B1 thru B8
A1 thru A8
B1 thru B8
I
High-level output current
mA
OH
OL
– 12
20
I
Low-level output current
mA
48
64
T
A
Operating free-air temperature
–55
125
0
70
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54F245
SN74F245
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
V
V
V
= 4.5 V,
= 4.5 V
I = –18 mA
–1.2
–1.2
V
IK
CC
I
I
I
I
I
I
I
I
I
I
= – 1 mA
= – 3 mA
2.5
2.4
2
3.4
3.3
3.2
2.5
2.4
3.4
3.3
OH
OH
OH
OH
OH
OL
OL
OL
OL
A1 thru A8
CC
V
OH
= – 12 mA
= – 15 mA
= –1 mA to – 3 mA
= 20 mA
V
V
B1 thru B8
Any output
A1 thru A8
V
CC
V
CC
V
CC
= 4.5 V
= 4.75 V,
= 4.5 V
2
3.1
2.7
0.3
0.5
= 24 mA
0.35
0.42
0.5
V
OL
= 48 mA
0.38
0.55
B1 thru B8
V
CC
V
CC
V
CC
V
CC
V
CC
= 4.5 V
= 5.5 V
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 64 mA
0.55
1
A and B
V = 5.5 V
I
1
0.1
I
I
mA
µA
DIR, OE
A and B
V = 7 V
I
0.1
70
70
‡
V = 2.7 V
I
I
I
I
IH
DIR, OE
A and B
20
20
–0.65
– 1.2
–150
–0.65
– 1.2
–150
–225
90
‡
V = 0.5 V
I
mA
mA
IL
DIR, OE
A1 thru A8
B1 thru B8
–60
–60
§
V
O
= 0
OS
–100
–225 –100
Outputs high
Outputs low
70
95
85
90
120
110
70
95
85
I
V
CC
= 5.5 V
120
110
mA
CC
Outputs disabled
†
‡
§
All typical values are at V
= 5 V, T = 25°C.
A
CC
For I/O ports, the parameters I and I include the off-state output current.
IH
IL
Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
switching characteristics (see Note 2)
V
C
R
= 5 V,
= 50 pF,
= 500 Ω,
= 25°C
V
C
R
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
L
CC
L
L
= 500Ω,
FROM
(INPUT)
TO
(OUTPUT)
†
PARAMETER
UNIT
T
A
T
A
= MIN to MAX
′F245
TYP
3.8
SN54F245
SN74F245
MIN
1.7
1.7
2.2
2.7
2.2
1.2
MAX
6
MIN
1.2
1.2
1.7
2.2
1.7
1.2
MAX
MIN
1.7
1.7
2.2
2.7
2.2
1.2
MAX
t
t
7.5
7.5
9
7
7
PLH
PHL
PZH
A or B
B or A
A or B
A or B
ns
ns
ns
4.2
6
t
4.9
7
8
OE
OE
t
5.6
8
10
9
9
PZL
t
4.6
6.5
6.5
7.5
7.5
PHZ
t
4.6
10
PLZ
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and waveforms are shown in Section 1.
2–4
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
LCCC
CDIP
CFP
Drawing
85511012A
8551101RA
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
OBSOLETE
ACTIVE
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
8551101SA
W
FK
J
JM38510/34803B2A
JM38510/34803BRA
JM38510/34803BSA
SN54F245J
LCCC
CDIP
CFP
W
J
CDIP
SSOP
SSOP
SN74F245DBLE
SN74F245DBR
DB
DB
2000
25
Pb-Free
(RoHS)
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
SN74F245DW
SN74F245DWR
SN74F245N
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
SN74F245N3
OBSOLETE
ACTIVE
PDIP
SO
N
20
20
None
Call TI
Call TI
SN74F245NSR
NS
2000
Pb-Free
(RoHS)
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
SNJ54F245FK
SNJ54F245J
SNJ54F245W
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.
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
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
28-Feb-2005
to Customer on an annual basis.
Addendum-Page 2
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
and conditions of sale supplied at the time of order acknowledgment.
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.
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Post Office Box 655303 Dallas, Texas 75265
Copyright 2005, Texas Instruments Incorporated
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