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SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A MARCH 1987 REVISED OCTOBER 1993
Copyright
1993, Texas Instruments Incorporated
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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
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) input can be used to disable the device so the
buses are effectively isolated.
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.
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.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
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
SN54F245 . . . J PACKAGE
SN74F245 . . . DB, DW, OR N 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
A2
A1
DIR
B7
B6
OE
A8
GND
B8
V
CC
SN54F245 . . . FK PACKAGE
(TOP VIEW)
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.
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A MARCH 1987 REVISED OCTOBER 1993
22
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic symbol
logic diagram (positive logic)
A5
6
A6
7
A7
8
A8
9
A2
3
A3
4
A4
5
OE
A1
2
G3
19
3EN2[AB]
B5
14
B6
13
B7
12
B8
11
B1
18
B2
17
B3
16
B4
15
3EN1[BA]
1
DIR
DIR
OE
A1
B1
1
2
18
19
To Seven Other Channels
1
2
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
CC
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(except I/O ports) (see Note 1)
1.2 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A MARCH 1987 REVISED OCTOBER 1993
23
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
SN54F245
SN74F245
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.8
0.8
V
IIK
Input clamp current
18
18
mA
IOH
High level output current
A1 thru A8
3
3
mA
IOH
High-level output current
B1 thru B8
12
15
mA
IOL
Low level output current
A1 thru A8
20
24
mA
IOL
Low-level output current
B1 thru B8
48
64
mA
TA
Operating free-air temperature
55
125
0
70
C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F245
SN74F245
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = 18 mA
1.2
1.2
V
A1 thru A8
VCC = 4 5 V
IOH = 1 mA
2.5
3.4
2.5
3.4
A1 thru A8
VCC = 4.5 V
IOH = 3 mA
2.4
3.3
2.4
3.3
VOH
B1 thru B8
VCC = 4 5 V
IOH = 12 mA
2
3.2
V
B1 thru B8
VCC = 4.5 V
IOH = 15 mA
2
3.1
Any output
VCC = 4.75 V,
IOH = 1 mA to 3 mA
2.7
A1 thru A8
VCC = 4 5 V
IOL = 20 mA
0.3
0.5
VOL
A1 thru A8
VCC = 4.5 V
IOL = 24 mA
0.35
0.5
V
VOL
B1 thru B8
VCC = 4 5 V
IOL = 48 mA
0.38
0.55
V
B1 thru B8
VCC = 4.5 V
IOL = 64 mA
0.42
0.55
II
A and B
VCC = 5 5 V
VI = 5.5 V
1
1
mA
II
DIR, OE
VCC = 5.5 V
VI = 7 V
0.1
0.1
mA
I
A and B
VCC = 5 5 V
VI = 2 7 V
70
70
A
IIH
DIR, OE
VCC = 5.5 V,
VI = 2.7 V
20
20
A
I
A and B
VCC = 5 5 V
VI = 0 5 V
0.65
0.65
mA
IIL
DIR, OE
VCC = 5.5 V,
VI = 0.5 V
1.2
1.2
mA
IOS
A1 thru A8
VCC = 5 5 V
VO = 0
60
150
60
150
mA
IOS
B1 thru B8
VCC = 5.5 V,
VO = 0
100
225
100
225
mA
Outputs high
70
90
70
90
ICC
VCC = 5.5 V
Outputs low
95
120
95
120
mA
Outputs disabled
85
110
85
110
All typical values are at VCC = 5 V, TA = 25
C.
For I/O ports, the parameters IIH and IIL include the off-state output current.
Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A MARCH 1987 REVISED OCTOBER 1993
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics (see Note 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
CL = 50 pF,
RL = 500
,
TA = 25
C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500
,
TA = MIN to MAX
UNIT
(INPUT)
(OUTPUT)
F245
SN54F245
SN74F245
MIN
TYP
MAX
MIN
MAX
MIN
MAX
tPLH
A or B
B or A
1.7
3.8
6
1.2
7.5
1.7
7
ns
tPHL
A or B
B or A
1.7
4.2
6
1.2
7.5
1.7
7
ns
tPZH
OE
A or B
2.2
4.9
7
1.7
9
2.2
8
ns
tPZL
OE
A or B
2.7
5.6
8
2.2
10
2.7
9
ns
tPHZ
OE
A or B
2.2
4.6
6.5
1.7
9
2.2
7.5
ns
tPLZ
OE
A or B
1.2
4.6
6.5
1.2
10
1.2
7.5
ns
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.
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package
Type
Package
Drawing
Pins Package
Qty
Eco Plan
(2)
Lead/Ball Finish
MSL Peak Temp
(3)
85511012A
ACTIVE
LCCC
FK
20
1
None
Call TI
Level-NC-NC-NC
8551101RA
ACTIVE
CDIP
J
20
1
None
Call TI
Level-NC-NC-NC
8551101SA
ACTIVE
CFP
W
20
1
None
Call TI
Level-NC-NC-NC
JM38510/34803B2A
ACTIVE
LCCC
FK
20
1
None
Call TI
Level-NC-NC-NC
JM38510/34803BRA
ACTIVE
CDIP
J
20
1
None
Call TI
Level-NC-NC-NC
JM38510/34803BSA
ACTIVE
CFP
W
20
1
None
Call TI
Level-NC-NC-NC
SN54F245J
ACTIVE
CDIP
J
20
1
None
Call TI
Level-NC-NC-NC
SN74F245DBLE
OBSOLETE
SSOP
DB
20
None
Call TI
Call TI
SN74F245DBR
ACTIVE
SSOP
DB
20
2000
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
SN74F245DW
ACTIVE
SOIC
DW
20
25
Pb-Free
(RoHS)
CU NIPDAU
Level-2-250C-1 YEAR/
Level-1-235C-UNLIM
SN74F245DWR
ACTIVE
SOIC
DW
20
2000
Pb-Free
(RoHS)
CU NIPDAU
Level-2-250C-1 YEAR/
Level-1-235C-UNLIM
SN74F245N
ACTIVE
PDIP
N
20
20
Pb-Free
(RoHS)
CU NIPDAU
Level-NC-NC-NC
SN74F245N3
OBSOLETE
PDIP
N
20
None
Call TI
Call TI
SN74F245NSR
ACTIVE
SO
NS
20
2000
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
SNJ54F245FK
ACTIVE
LCCC
FK
20
1
None
Call TI
Level-NC-NC-NC
SNJ54F245J
ACTIVE
CDIP
J
20
1
None
Call TI
Level-NC-NC-NC
SNJ54F245W
ACTIVE
CFP
W
20
1
None
Call TI
Level-NC-NC-NC
(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
PACKAGE OPTION ADDENDUM
www.ti.com
28-Feb-2005
Addendum-Page 1
to Customer on an annual basis.
PACKAGE OPTION ADDENDUM
www.ti.com
28-Feb-2005
Addendum-Page 2
IMPORTANT NOTICE
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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.
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Copyright
2005, Texas Instruments Incorporated