SN54BCT245, SN74BCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS013H – SEPTEMBER 1998 – REVISED MAY 2002
D
D
SN54BCT245 . . . J OR W PACKAGE
SN74BCT245 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
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 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.
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
OE
B1
B2
B3
B4
B5
B6
B7
B8
A2
A1
DIR
VCC
OE
SN54BCT245 . . . FK PACKAGE
(TOP VIEW)
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
B1
B2
B3
B4
B5
A8
GND
B8
B7
B6
A3
A4
A5
A6
A7
ORDERING INFORMATION
PDIP – N
–55°C to 125°C
TOP-SIDE
MARKING
Tube
SN74BCT245N
Tube
SN74BCT245DW
Tape and reel
SN74BVT245DWR
SOP – NS
Tape and reel
SN74BCT245NSR
BCT245
SSOP – DB
Tape and reel
SN74BCT245DBR
BT245
TSSOP – PW
Tape and reel
SN74BCT245PWR
BT245
CDIP – J
Tube
SNJ54BCT245J
SNJ54BCT245J
CFP – W
Tube
SNJ54BCT245W
SNJ54BCT245W
LCCC – FK
Tube
SNJ54BCT245FK
SOIC – DW
0°C to 70°C
ORDERABLE
PART NUMBER
PACKAGE†
TA
SN74BCT245N
BCT245
SNJ54BCT245FK
† 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 2002, 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
SN54BCT245, SN74BCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS013H – SEPTEMBER 1998 – REVISED MAY 2002
FUNCTION TABLE
INPUTS
OE
DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
logic diagram (positive logic)
DIR
1
19
A1
OE
2
18
B1
To Seven Other Channels
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: 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 7 V
Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC
Current into any output in the low state, IO: SN54BCT245 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74BCT245 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°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.
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SN54BCT245, SN74BCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS013H – SEPTEMBER 1998 – REVISED MAY 2002
recommended operating conditions (see Note 3)
SN54BCT245
SN74BCT245
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
High level output current
High-level
A port
–3
–3
B port
–12
–15
IOL
Low level output current
Low-level
A port
20
24
B port
48
64
High-level input voltage
2
2
V
V
mA
mA
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.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VCC = 4.5 V,
A port
VCC = 4
4.5
5V
VOH
B port
A port
VCC = 4.5 V
A or B port
II
IIH‡
IIL‡
IOS§
ICCL
ICCH
ICCZ
Ci
Ciio
Control input
A or B port
Control input
A or B port
Control input
A port
B port
A to B
IOH = – 3 mA
IOH = – 3 mA
IOH = –12 mA
IOH = – 15 mA
3.4
2.5
3.4
2.4
3.3
2.4
3.3
2.4
3.3
2.4
3.3
2
3.2
2
3.1
VCC = 4
4.5
5V
IOL = 48 mA
IOL = 64 mA
0.38
0.55
VI = 5
5.5
5V
5V
VCC = 5
5.5
V,
7V
VI = 2
2.7
VCC = 5
5.5
5V
V,
VI = 0
0.5
5V
VCC = 5
5.5
5V
V,
VO = 0
Control input
VCC = 5.5 V
VCC = 5 V,
VCC = 5 V
V,
–1.2
2.5
0.5
VCC = 5
5.5
5V
V,
SN74BCT245
TYP†
MAX
MIN
–1.2
0.3
VCC = 5.5 V
VCC = 5.5 V
B to A
II = –18 mA
IOH = –1 mA
IOL = 20 mA
IOL = 24 mA
A to B
A to B
MIN
VCC = 4
4.5
5V
VOL
B port
SN54BCT245
TYP†
MAX
TEST CONDITIONS
0.35
0.5
0.42
0.55
1
1
0.1
0.1
70
70
20
20
– 0.65
– 0.65
–1.2
–1.2
–150
– 60
–150
–100
– 225
–100
– 225
VO = 2
2.5
5 V or 0.5
05V
V
V
– 60
VI = 2.5 V or 0.5 V
UNIT
V
mA
µA
mA
mA
57
90
57
90
mA
36
57
36
57
mA
10
15
10
15
mA
7
7
9
9
12
12
pF
pF
† 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SN54BCT245, SN74BCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS013H – SEPTEMBER 1998 – REVISED MAY 2002
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†
′BCT245
tPLH
tPHL
A or B
B or A
tPZH
tPZL
OE
A or B
tPHZ
tPLZ
OE
A or B
SN54BCT245
SN74BCT245
MIN
TYP
MAX
MIN
MAX
MIN
MAX
1
4.4
6
1
7.2
1
7
1.5
4.8
6.6
1.5
7.6
1.5
7
1.5
8
9.4
1.5
11.2
1.5
10.9
1.5
8
10.2
1.5
11.8
1.5
11.6
1.5
5.8
8.3
1.5
9.7
1.5
9.3
1.5
5.1
7.8
1.5
9.6
1.5
9.1
† 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
SN54BCT245, SN74BCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS013H – SEPTEMBER 1998 – REVISED MAY 2002
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.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
SN54BCT245, SN74BCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS013H – SEPTEMBER 1998 – REVISED MAY 2002
TYPICAL CHARACTERISTICS†
Figures 2 through 5 show the typical power dissipation for an SN74BCT245 over variations in outputs switching,
output frequency, and capacitive load.
POWER DISSIPATION
vs
FREQUENCY
POWER DISSIPATION
vs
FREQUENCY
1400
900
750
VCC = 5.5 V
TA = 70°C
RL = 500 Ω
Air Flow = 0
CL = 50 pF
Eight Switching
VCC = 5.5 V
TA = 70°C
RL = 500 Ω
Air Flow = 0
CL = 15 pF
PD – Power Dissipation – mW
PD – Power Dissipation – mW
1050
Four Switching
600
450
One Switching
300
150
1200
1000
800
Four Switching
600
One Switching
400
200
0
0
0
10
20
30
40
50
10
0
f – Frequency – MHz
20
1750
VCC = 5.5 V
TA = 70°C
RL = 500 Ω
Air Flow = 0
CL = 150 pF
Eight Switching
1500
PD – Power Dissipation – mW
PD – Power Dissipation – mW
1250
50
POWER DISSIPATION
vs
FREQUENCY
1750
1500
40
Figure 3
POWER DISSIPATION
vs
FREQUENCY
VCC = 5.5 V
TA = 70°C
RL = 500 Ω
Air Flow = 0
CL = 100 pF
30
f – Frequency – MHz
Figure 2
Four Switching
1000
750
One Switching
500
1250
Eight Switching
Four Switching
1000
750
One Switching
500
250
250
0
0
0
10
20
30
f – Frequency – MHz
40
50
0
Figure 4
10
20
30
40
f – Frequency – MHz
Figure 5
† The dashed lines are for the DB package only.
6
Eight Switching
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
50
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-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)
5962-9051401M2A
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629051401M2A
SNJ54
BCT245FK
5962-9051401MRA
ACTIVE
CDIP
J
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9051401MR
A
SNJ54BCT245J
5962-9051401MSA
ACTIVE
CFP
W
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9051401MS
A
SNJ54BCT245W
SN74BCT245DBR
ACTIVE
SSOP
DB
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BT245
Samples
SN74BCT245DW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BCT245
Samples
SN74BCT245DWR
ACTIVE
SOIC
DW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BCT245
Samples
SN74BCT245N
ACTIVE
PDIP
N
20
20
RoHS &
Non-Green
NIPDAU
N / A for Pkg Type
0 to 70
SN74BCT245N
Samples
SN74BCT245NSR
ACTIVE
SO
NS
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BCT245
Samples
SN74BCT245PW
ACTIVE
TSSOP
PW
20
70
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BT245
Samples
SN74BCT245PWR
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BT245
Samples
SNJ54BCT245FK
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629051401M2A
SNJ54
BCT245FK
SNJ54BCT245J
ACTIVE
CDIP
J
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9051401MR
A
SNJ54BCT245J
SNJ54BCT245W
ACTIVE
CFP
W
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9051401MS
A
SNJ54BCT245W
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
Addendum-Page 1
Samples
Samples
Samples
Samples
Samples
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
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)
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