SCBS025C − SEPTEMBER 1988 − REVISED APRIL 1994
Copyright 1994, Texas Instruments Incorporated
2−1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
•State-of-the-Art BiCMOS Design
Substantially Reduces Standby Current
•Outputs Have Undershoot-Protection
Circuitry
•Power-Up High-Impedance State
•Buffered Control Inputs to Reduce DC
Loading Effects
•ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
•Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)
description
The ′BCT640 bus transceiver is designed for
asynchronous communication between data
buses. These devices transmit data from the A
bus to the B bus or from the B bus to the A bus
depending upon the 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.
The SN54BCT640 is characterized for operation
over the full military temperature range of −55°C
to 125°C. The SN74BCT640 is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
OE DIR
OPERATION
L L B data to A bus
LHA 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
VCC
OE
B1
B2
B3
B4
B5
B6
B7
B8
SN54BCT640 ...J OR W PACKAGE
SN74BCT640 . . . DW OR N PACKAGE
(TOP VIEW)
3212019
910 11 12 13
4
5
6
7
8
18
17
16
15
14
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
SN54BCT640 . . . FK PACKAGE
(TOP VIEW)
A2
A1
DIR
B7
B6 OE
A8
G
ND
B8 VCC
!"# $ %&'# "$ (&)*%"# +"#',
+&%#$ %! # $('%%"#$ (' #-' #'!$ '."$ $#&!'#$
$#"+"+ /""#0, +&%# (%'$$1 +'$ # '%'$$"*0 %*&+'
#'$#1 "** (""!'#'$,
SCBS025C − SEPTEMBER 1988 − REVISED APRIL 1994
2−2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
logic symbol†logic diagram (positive logic)
1
2
A1 B1
3 EN1 [BA]
1
DIR
3 EN2 [AB]
2
A1
3
A2
B1
18
4
A3 5
A4 6
A5 7
A6 8
A7 9
A8
B2
17
B3
16
B5
14 B4
15
B6
13
B8
11 B7
12
OE
1
19
1
182
G3
19 OE
DIR
1
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, VCC − 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range: Control inputs (see Note 1) − 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O ports (see Note 1) − 0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the disabled or power-off state, VO− 0.5 V to 5.5 V. . . . . . . . . . . . . . .
Voltage range applied to any output in the high state, VO− 0.5 V to VCC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, IIK −30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state: SN54BCT640 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT640 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54BCT640 − 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT640 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 and output voltage ratings may be exceeded if the input and output current ratings are observed.
SCBS025C − SEPTEMBER 1988 − REVISED APRIL 1994
2−3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
recommended operating conditions
SN54BCT640 SN74BCT640
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
A port −3 −3
mA
IOH High-level output current B port −12 −15 mA
IOL
Low-level output current
A port 20 24
mA
IOL Low-level output current B port 48 64 mA
TAOperating free-air temperature −55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54BCT640 SN74BCT640
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP†MAX MIN TYP†MAX
UNIT
VIK VCC = 4.5 V, II = −18 mA −1.2 −1.2 V
A port
VCC = 4.5 V
IOH = −1 mA 2.5 3.4 2.5 3.4
A port VCC = 4.5 V IOH = −3 mA 2.4 3.3 2.4 3.3
V
OH
IOH = −3 mA 2.4 3.3 2.4 3.3 V
VOH
B port V
CC
= 4.5 V IOH = −12 mA 2 3.2
V
B port
VCC = 4.5 V
IOH = −15 mA 2 3.1
A port
VCC = 4.5 V
IOL = 20 mA 0.3 0.5
VOL
A port VCC = 4.5 V IOL = 24 mA 0.35 0.5
V
VOL
B port
VCC = 4.5 V
IOL = 48 mA 0.38 0.55 V
B port VCC = 4.5 V IOL = 64 mA 0.42 0.55
II
A or B port
VCC = 5.5 V,
VI = 5.5 V
1 1
mA
IIControl inputs VCC = 5.5 V, VI = 5.5 V 0.1 0.1 mA
IIH‡
A or B port
VCC = 5.5 V,
VI = 2.7 V
70 70
A
IIH
‡
Control inputs VCC = 5.5 V, VI = 2.7 V 20 20 µA
IIL‡
A or B port
VCC = 5.5 V,
VI = 0.5 V
−0.6 −0.6
mA
IIL
‡
Control inputs VCC = 5.5 V, VI = 0.5 V −0.65 −0.65 mA
IOS§
A port
VCC = 5.5 V,
VO = 0
−60 −150 −60 −150
mA
IOS
§
B port VCC = 5.5 V, VO = 0 −100 −225 −100 −225 mA
ICCL A to B VCC = 5.5 V 53 84 53 94 mA
ICCH A to B VCC = 5.5 V 23 37 23 41 mA
ICCZ VCC = 5.5 V 4 10 4 11 mA
†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 tested at a time, and the duration of the test should not exceed one second.
SCBS025C − SEPTEMBER 1988 − REVISED APRIL 1994
2−4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
switching characteristics (see Note 2)
PARAMETER FROM
(INPUT) TO
(OUTPUT)
VCC = 5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = 25°C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX†UNIT
(INPUT)
(OUTPUT)
′BCT640 SN54BCT640 SN74BCT640
MIN TYP MAX MIN MAX MIN MAX
tPLH
A or B
B or A
0.5 3.6 5.6 0.5 7 0.5 6.5
ns
tPHL A or B B or A 0.5 1.9 3.4 0.5 3.8 0.5 3.7 ns
tPZH
OE
A or B
3.1 6.4 8.9 2.6 10.5 2.6 10.2
ns
tPZL
OE
A or B 4.1 6.9 9.5 3.5 12.3 3.5 10.7 ns
tPHZ
OE
A or B
1.9 5 7.9 1.4 12.2 1.4 10.2
ns
tPLZ
OE
A or B
1.8 4.3 6.8 1.5 8.3 1.5 7.8
ns
†For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
PACKAGE OPTION ADDENDUM
www.ti.com 25-Sep-2013
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
5962-9075201M2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 5962-
9075201M2A
SNJ54BCT
640FK
5962-9075201MRA ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type -55 to 125 5962-9075201MR
A
SNJ54BCT640J
5962-9075201MSA ACTIVE CFP W 20 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9075201MS
A
SNJ54BCT640W
SN74BCT640DW ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 BCT640
SN74BCT640DWE4 ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 BCT640
SN74BCT640DWG4 ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 BCT640
SN74BCT640N ACTIVE PDIP N 20 20 Pb-Free
(RoHS) CU NIPDAU N / A for Pkg Type 0 to 70 SN74BCT640N
SN74BCT640NE4 ACTIVE PDIP N 20 20 Pb-Free
(RoHS) CU NIPDAU N / A for Pkg Type 0 to 70 SN74BCT640N
SN74BCT640NSR ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 BCT640
SN74BCT640NSRE4 ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 BCT640
SN74BCT640NSRG4 ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 BCT640
SNJ54BCT640FK ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 5962-
9075201M2A
SNJ54BCT
640FK
SNJ54BCT640J ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type -55 to 125 5962-9075201MR
A
SNJ54BCT640J
SNJ54BCT640W ACTIVE CFP W 20 1 TBD Call TI N / A for Pkg Type -55 to 125 5962-9075201MS
A
PACKAGE OPTION ADDENDUM
www.ti.com 25-Sep-2013
Addendum-Page 2
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
SNJ54BCT640W
(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.
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.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
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.
OTHER QUALIFIED VERSIONS OF SN54BCT640, SN74BCT640 :
•Catalog: SN74BCT640
•Military: SN54BCT640
PACKAGE OPTION ADDENDUM
www.ti.com 25-Sep-2013
Addendum-Page 3
NOTE: Qualified Version Definitions:
•Catalog - TI's standard catalog product
•Military - QML certified for Military and Defense Applications
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
SN74BCT640NSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
SN74BCT640NSR SO NS 20 2000 367.0 367.0 45.0
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 2
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