SN54BCT240, SN74BCT240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS004F – OCTOBER 1987 – REVISED MARCH 2003
D
Operating Voltage Range of 4.5 V to 5.5 V
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
D
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
SN54BCT240 . . . J OR W PACKAGE
SN74BCT240 . . . DB, DW, N, OR NS PACKAGE
(TOP VIEW)
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
2Y4
1A1
1OE
VCC
1
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
1A2
2Y3
1A3
2Y2
1A4
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
1Y1
2A4
1Y2
2A3
1Y3
2Y1
GND
2A1
1Y4
2A2
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
SN54BCT240 . . . FK PACKAGE
(TOP VIEW)
2OE
D
D
description/ordering information
These octal buffers and line drivers are designed specifically to improve both the performance and density of
3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. Together with the
’BCT241 and ’BCT244 devices, these devices provide the choice of selected combinations of inverting and
noninverting outputs, symmetrical OE (active-low output-enable) inputs, and complementary OE and OE
inputs. These devices feature high fan-out and improved fan-in.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
PDIP – N
0°C to 70°C
–55°C to 125°C
ORDERABLE
PART NUMBER
PACKAGE†
TA
TOP-SIDE
MARKING
Tube
SN74BCT240N
Tube
SN74BCT240DW
Tape and reel
SN74BCT240DWR
SOP – NS
Tape and reel
SN74BCT240NSR
BCT240
SSOP – DB
Tape and reel
SN74BCT240DBR
BT240
CDIP – J
Tube
SNJ54BCT240J
SNJ54BCT240J
CFP – W
Tube
SNJ54BCT240W
SNJ54BCT240W
SOIC – DW
SN74BCT240N
BCT240
LCCC – FK
Tube
SNJ54BCT240FK
SNJ54BCT240FK
† 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
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.
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SN54BCT240, SN74BCT240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS004F – OCTOBER 1987 – REVISED MARCH 2003
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
Y
OE
A
L
H
L
L
L
H
H
X
Z
logic diagram (positive logic)
1
1OE
2
18
4
16
6
14
8
12
1A1
1A2
1A3
1A4
1Y1
1Y2
1Y3
1Y4
19
2OE
11
9
13
7
15
5
17
3
2A1
2A2
2A3
2A4
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
2Y1
2Y2
2Y3
2Y4
SN54BCT240, SN74BCT240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS004F – OCTOBER 1987 – REVISED MARCH 2003
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, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 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: SN54BCT240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74BCT240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Package thermal impedance, θJA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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.
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.
recommended operating conditions (see Note 3)
SN54BCT240
SN74BCT240
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
UNIT
VCC
VIH
Supply voltage
VIL
IIK
Low-level input voltage
0.8
0.8
V
Input clamp current
–18
–18
mA
IOH
IOL
High-level output current
–12
–15
mA
Low-level output current
48
64
mA
High-level input voltage
2
2
V
V
TA
Operating free-air temperature
–55
125
0
70
°C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SN54BCT240, SN74BCT240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS004F – OCTOBER 1987 – REVISED MARCH 2003
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
SN54BCT240
TYP†
MAX
TEST CONDITIONS
VCC = 4.5 V,
VCC = 4.5 V
MIN
II = –18 mA
IOH = –3 mA
SN74BCT240
TYP†
MAX
MIN
–1.2
IOH = –12 mA
IOH = –15 mA
2.4
3.3
2
3.2
–1.2
2.4
V
3.3
V
2
0.38
UNIT
3.1
VOL
VCC = 4
4.5
5V
IOL = 48 mA
IOL = 64 mA
0.55
II
IIH
VCC = 5.5 V,
VCC = 5.5 V,
VI = 7 V
VI = 2.7 V
0.1
0.1
mA
20
20
µA
IIL
IOZH
VCC = 5.5 V,
VCC = 5.5 V,
VI = 0.5 V
VO = 2.7 V
–1
–1
mA
50
50
µA
IOZL
IOS‡
VCC = 5.5 V,
VCC = 5.5 V,
VO = 0.5 V
VO = 0
–50
–50
µA
–225
mA
ICCH
ICCL
VCC = 5.5 V,
VCC = 5.5 V,
Outputs open
19
31
19
31
mA
Outputs open
46
71
46
71
mA
ICCZ
Ci
VCC = 5.5 V,
VCC = 5 V,
Outputs open
6
9
6
9
mA
VI = 2.5 V or 0.5 V
VO = 2.5 V or 0.5 V
6
0.42
–100
–225
–100
Co
VCC = 5 V,
11
† All typical values are at VCC = 5 V.
‡ Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
0.55
V
6
pF
11
pF
switching characteristics (see Figure 1)
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§
’BCT240
tPLH
tPHL
A
Y
tPZH
tPZL
OE
Y
tPHZ
tPLZ
OE
Y
SN54BCT240
SN74BCT240
MIN
TYP
MAX
MIN
MAX
MIN
MAX
0.5
3.3
4.8
0.5
6.4
0.5
5.6
0.4
1.8
3.5
0.4
4.5
0.4
4
1
6.4
7.9
1
9.2
1
8.8
1
7.5
9.4
1
10.8
1
10.5
1
6
6.8
1
8.5
1
8.1
1
6.7
8.1
1
10.6
1
9.5
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
4
POST OFFICE BOX 655303
UNIT
• DALLAS, TEXAS 75265
ns
ns
ns
SN54BCT240, SN74BCT240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS004F – OCTOBER 1987 – REVISED MARCH 2003
PARAMETER MEASUREMENT INFORMATION
7 V (tPZL, tPLZ, O.C.)
S1
Open
(all others)
From Output
Under Test
Test
Point
CL
(see Note A)
R1
From Output
Under Test
R1
Test
Point
CL
(see Note A)
R2
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
RL = R1 = R2
LOAD CIRCUIT FOR
3-STATE AND OPEN-COLLECTOR OUTPUTS
High-Level
Pulse
(see Note B)
3V
Timing Input
(see Note B)
3V
1.5 V
1.5 V
0V
1.5 V
tw
0V
Data Input
(see Note B)
3V
th
tsu
Low-Level
Pulse
3V
1.5 V
1.5 V
0V
1.5 V
1.5 V
VOLTAGE WAVEFORMS
PULSE DURATION
0V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
3V
3V
Input
(see Note B)
1.5 V
1.5 V
0V
tPLH
In-Phase
Output
(see Note D)
VOH
1.5 V
1.5 V
VOL
VOH
1.5 V
1.5 V
0V
tPLZ
1.5 V
Waveform 1
(see Notes C and D)
3.5 V
VOL
tPHZ
tPLH
1.5 V
1.5 V
tPZL
tPHL
tPHL
Out-of-Phase
Output
(see Note D)
Output
Control
(low-level enable)
0.3 V
tPZH
Waveform 2
(see Notes C and D)
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES (see Note D)
VOH
1.5 V
0.3 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, tr = tf ≤ 2.5 ns, duty cycle = 50%.
C. 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.
D. The outputs are measured one at a time with one transition per measurement.
E. When measuring propagation delay times of 3-state outputs, switch S1 is open.
F. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
PACKAGE OPTION ADDENDUM
www.ti.com
10-Jun-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
5962-9074201M2A
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629074201M2A
SNJ54
BCT240FK
5962-9074201MRA
ACTIVE
CDIP
J
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9074201MR
A
SNJ54BCT240J
5962-9074201MSA
ACTIVE
CFP
W
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9074201MS
A
SNJ54BCT240W
SN74BCT240DW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BCT240
Samples
SN74BCT240N
ACTIVE
PDIP
N
20
20
RoHS &
Non-Green
NIPDAU
N / A for Pkg Type
0 to 70
SN74BCT240N
Samples
SN74BCT240NSR
ACTIVE
SO
NS
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BCT240
Samples
SNJ54BCT240FK
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629074201M2A
SNJ54
BCT240FK
SNJ54BCT240J
ACTIVE
CDIP
J
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9074201MR
A
SNJ54BCT240J
SNJ54BCT240W
ACTIVE
CFP
W
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9074201MS
A
SNJ54BCT240W
(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.
Addendum-Page 1
Samples
Samples
Samples
Samples
Samples
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
10-Jun-2022
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of