SN54F245, SN74F245
OPERATION
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCT OBER 1993
• 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.
SN54F245 ...J PACKAGE
SN74F245 . . . DB, DW, OR N PACKAGE
A3
A4
A5
A6
A7
(TOP VIEW)
DIR
1
A1
2
A2
3
A3
4
A4
5
A5
6
A6
7
A7
8
9
A8
GND
SN54F245 . . . FK PACKAGE
10
(TOP VIEW)
A2A1DIR
3212019
4
5
6
7
8
910 11 12 13
20
19
18
17
16
15
14
13
12
11
V
CC
V
OE
B1
B2
B3
B4
B5
B6
B7
B8
18
17
16
15
14
CC
B1
B2
B3
B4
B5
FUNCTION TABLE
INPUTS
OE DIR
L L B data to A bus
L H A data to B bus
H X Isolation
A8
GND
B8
B7
B6 OE
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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1993, Texas Instruments Incorporated
2–1
SN54F245, SN74F245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCT OBER 1993
19
1
2
3
4
5
6
7
8
9
†
G3
3EN1[BA]
3EN2[AB]
1
2
18
17
16
15
14
13
12
11
logic diagram (positive logic)
1
DIR
B1
B2
B3
B4
B5
B6
B7
B8
A1
2
To Seven Other Channels
19
18
OE
B1
logic symbol
OE
DIR
A1
A2
A3
A4
A5
A6
A7
A8
†
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
Input voltage range, 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
Current into any output in the low state: SN54F245 (A1 thru A8) 40 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54F245 –55°C to 125°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.
–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
(except I/O ports) (see Note 1) –1.2 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN54F245 (B1 thru B8) 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F245 (A1 thru A8) 48 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F245 (B1 thru B8) 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F245 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‡
CC
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54F245, SN74F245
UNIT
IOHHigh-level output current
mA
IOLLow-level output current
mA
PARAMETER
TEST CONDITIONS
UNIT
A1 thru A8
V
V
B1 thru B8
V
V
A1 thru A8
V
4.5 V
V
V
B1 thru B8
V
V
I
V
V
mA
I
‡
V
5.5 V
V
2.7 V
A
I
‡
V
V
V
mA
I
§
V
V
0
mA
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
recommended operating conditions
SN54F245 SN74F245
MIN NOM MAX MIN NOM MAX
V
CC
V
IH
V
IL
I
IK
T
A
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
V
IK
V
OH
OL
I
IH
IL
OS
I
CC
†
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.
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
High-level input voltage 2 2 V
Low-level input voltage 0.8 0.8 V
Input clamp current –18 –18 mA
p
p
Operating free-air temperature –55 125 0 70 °C
VCC = 4.5 V, II = –18 mA –1.2 –1.2 V
= 4.5
CC
= 4.5
CC
Any output VCC = 4.75 V, IOH = –1 mA to – 3 mA 2.7
=
CC
= 4.5
CC
A and B
DIR, OE
A and B
DIR, OE
A and B
DIR, OE
A1 thru A8
B1 thru B8
= 5.5
CC
=
CC
= 5.5 V,
CC
= 5.5 V,
CC
VCC = 5.5 V
,
IOH = – 1 mA 2.5 3.4 2.5 3.4
IOH = – 3 mA 2.4 3.3 2.4 3.3
IOH = – 12 mA 2 3.2
IOH = – 15 mA 2 3.1
IOL = 20 mA 0.3 0.5
IOL = 24 mA 0.35 0.5
IOL = 48 mA 0.38 0.55
IOL = 64 mA 0.42 0.55
VI = 5.5 V 1 1
VI = 7 V 0.1 0.1
=
I
= 0.5
I
O
Outputs high 70 90 70 90
Outputs low 95 120 95 120
Outputs disabled 85 110 85 110
A1 thru A8 –3 –3
B1 thru B8 –12 –15
A1 thru A8 20 24
B1 thru B8 48 64
SN54F245 SN74F245
MIN TYP†MAX MIN TYP†MAX
70 70
20 20
–0.65 –0.65
– 1.2 – 1.2
=
–60 –150 –60 –150
–100 –225 –100 –225
V
µ
mA
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–3
SN54F245, SN74F245
(
)
(
)
(INPUT)
(OUTPUT)
A or B
B or A
ns
OE
A or B
ns
OE
A or B
ns
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCT OBER 1993
switching characteristics (see Note 2)
VCC = 5 V,
CL = 50 pF,
PARAMETER
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
†
NOTE 2: Load circuits and waveforms are shown in Section 1.
PLZ
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
FROM
INPUT
TO
OUTPUT
RL = 500 Ω,
TA = 25°C
′F245 SN54F245 SN74F245
MIN TYP MAX MIN MAX MIN MAX
1.7 3.8 6 1.2 7.5 1.7 7
1.7 4.2 6 1.2 7.5 1.7 7
2.2 4.9 7 1.7 9 2.2 8
2.7 5.6 8 2.2 10 2.7 9
2.2 4.6 6.5 1.7 9 2.2 7.5
1.2 4.6 6.5 1.2 10 1.2 7.5
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500Ω,
TA = MIN to MAX
†
UNIT
2–4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
8-Jun-2005
PACKAGING INFORMATION
Orderable Device Status
(1)
Package
Type
Package
Drawing
Pins Package
Qty
Eco Plan
85511012A ACTIVE LCCC FK 20 1 TBD Call TI Level-NC-NC-NC
8551101RA ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC
8551101SA ACTIVE CFP W 20 1 TBD Call TI Level-NC-NC-NC
JM38510/34803B2A ACTIVE LCCC FK 20 1 TBD Call TI Level-NC-NC-NC
JM38510/34803BRA ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC
JM38510/34803BSA ACTIVE CFP W 20 1 TBD Call TI Level-NC-NC-NC
SN54F245J ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC
SN74F245DBLE OBSOLETE SSOP DB 20 TBD Call TI Call TI
SN74F245DBR ACTIVE SSOP DB 20 2000 Pb-Free
SN74F245DBRE4 ACTIVE SSOP DB 20 2000 Pb-Free
SN74F245DBRG4 ACTIVE SSOP DB 20 2000 Green (RoHS &
no Sb/Br)
SN74F245DW ACTIVE SOIC DW 20 25 Pb-Free
SN74F245DWE4 ACTIVE SOIC DW 20 25 Pb-Free
SN74F245DWR ACTIVE SOIC DW 20 2000 Green (RoHS &
no Sb/Br)
SN74F245DWRE4 ACTIVE SOIC DW 20 2000 Green (RoHS &
no Sb/Br)
SN74F245N ACTIVE PDIP N 20 20 Pb-Free
SN74F245N3 OBSOLETE PDIP N 20 TBD Call TI Call TI
SN74F245NE4 ACTIVE PDIP N 20 20 Pb-Free
SN74F245NSR ACTIVE SO NS 20 2000 Pb-Free
SN74F245NSRE4 ACTIVE SO NS 20 2000 Pb-Free
SNJ54F245FK ACTIVE LCCC FK 20 1 TBD Call TI Level-NC-NC-NC
SNJ54F245J ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC
SNJ54F245W ACTIVE CFP W 20 1 TBD 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.
(RoHS)
(RoHS)
(RoHS)
(RoHS)
(RoHS)
(RoHS)
(RoHS)
(RoHS)
(2)
Lead/Ball Finish MSL Peak Temp
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CU NIPDAU Level-2-260C-1YEAR
CU NIPDAU Level-2-250C-1 YEAR/
Level-1-235C-UNLIM
CU NIPDAU Level-2-250C-1 YEAR/
Level-1-235C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-NC-NC-NC
CU NIPDAU Level-NC-NC-NC
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
CU NIPDAU Level-2-260C-1 YEAR/
Level-1-235C-UNLIM
(3)
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
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.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
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.
8-Jun-2005
Addendum-Page 2
MECHANICAL DATA
MLCC006B – OCTOBER 1996
FK (S-CQCC-N**) LEADLESS CERAMIC CHIP CARRIER
28 TERMINAL SHOWN
A SQ
B SQ
19
20
21
22
23
24
25
12826 27
12
1314151618 17
0.020 (0,51)
0.010 (0,25)
MIN
0.342
(8,69)
0.442
0.640
0.739
0.938
1.141
A
0.358
(9,09)
0.458
(11,63)
0.660
(16,76)
0.761
(19,32)(18,78)
0.962
(24,43)
1.165
(29,59)
NO. OF
TERMINALS
**
11
10
9
8
7
6
5
432
20
28
44
52
68
84
0.020 (0,51)
0.010 (0,25)
(11,23)
(16,26)
(23,83)
(28,99)
MINMAX
0.307
(7,80)
0.406
(10,31)
0.495
(12,58)
0.495
(12,58)
0.850
(21,6)
1.047
(26,6)
0.080 (2,03)
0.064 (1,63)
B
MAX
0.358
(9,09)
0.458
(11,63)
0.560
(14,22)
0.560
(14,22)
0.858
(21,8)
1.063
(27,0)
0.055 (1,40)
0.045 (1,14)
0.028 (0,71)
0.022 (0,54)
0.050 (1,27)
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
0.045 (1,14)
0.035 (0,89)
0.045 (1,14)
0.035 (0,89)
4040140/D 10/96
MECHANICAL DATA
MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001
DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE
28 PINS SHOWN
0,65
28
1
2,00 MAX
0,38
0,22
15
14
A
0,05 MIN
0,15
5,60
5,00
M
8,20
7,40
Seating Plane
0,10
0,25
0,09
0°–ā8°
Gage Plane
0,25
0,95
0,55
PINS **
DIM
A MAX
A MIN
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
14
6,50
6,50
5,905,90
2016
7,50
6,90
24
8,50
28
10,50
9,907,90
30
10,50
9,90
38
12,90
12,30
4040065 /E 12/01
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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