SN54ABT541, SN74ABT541B
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS093K JANUARY 1991 REVISED OCTOBER 1998
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
State-of-the-Art
EPIC-
B
TM
BiCMOS Design
Significantly Reduces Power Dissipation
D
Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD-17
D
Typical V
OLP
(Output Ground Bounce) < 1 V
at V
CC
= 5 V, T
A
= 25
C
D
High-Impedance State During Power Up
and Power Down
D
High-Drive Outputs (32-mA I
OH
, 64-mA I
OL
)
D
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK),
Ceramic Flat (W) Package, and Plastic (N)
and Ceramic (J) DIPs
description
The SN54ABT541 and SN74ABT541B octal
buffers and line drivers are ideal for driving bus
lines or buffering memory address registers. The
devices feature inputs and outputs on opposite
sides of the package to facilitate printed circuit
board layout.
The 3-state control gate is a two-input AND gate
with active-low inputs so that if either
output-enable (OE1 or OE2) input is high, all eight
outputs are in the high-impedance state.
When V
CC
is between 0 and 2.1 V, the device is in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 2.1 V, OE should be tied to V
CC
through a pullup resistor;
the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN54ABT541 is characterized for operation over the full military temperature range of 55
C to 125
C.
The SN74ABT541B is characterized for operation from 40
C to 85
C.
FUNCTION TABLE
INPUTS
OUTPUT
OE1
OE2
A
Y
L
L
L
L
L
L
H
H
H
X
X
Z
X
H
X
Z
Copyright
1998, 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.
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.
EPIC-
B is a trademark of Texas Instruments Incorporated.
SN54ABT541 . . . J OR W PACKAGE
SN74ABT541B . . . DB, DW, N, OR PW PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
Y1
Y2
Y3
Y4
Y5
A3
A4
A5
A6
A7
SN54ABT541 . . . FK PACKAGE
(TOP VIEW)
A2
A1
OE1
Y7
Y6
OE2
A8
GND
Y8
V
CC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE1
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OE2
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
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.
SN54ABT541, SN74ABT541B
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS093K JANUARY 1991 REVISED OCTOBER 1998
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic symbol
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
Y1
18
Y2
17
Y3
16
Y4
15
Y5
14
Y6
13
Y7
12
Y8
11
1
19
OE1
OE2
EN
&
1
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
logic diagram (positive logic)
OE1
OE2
To Seven Other Channels
A1
Y1
1
19
2
18
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
(see Note 1)
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high or power-off state, V
O
0.5 V to 5.5 V
. . . . . . . . . . . . . . . . . . .
Current into any output in the low state, I
O
: SN54ABT541 96
mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ABT541B 128
mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0)
18 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0)
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Note 2): DB package
115
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package
97
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
67
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package
128
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
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 negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
recommended operating conditions (see Note 3)
SN54ABT541
SN74ABT541B
UNIT
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
4.5
5.5
4.5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.8
0.8
V
IOH
High-level output current
24
32
mA
IOL
Low-level output current
48
64
mA
TA
Operating free-air temperature
55
125
40
85
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.
SN54ABT541, SN74ABT541B
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS093K JANUARY 1991 REVISED OCTOBER 1998
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TA = 25
C
SN54ABT541
SN74ABT541B
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
VIK
VCC = 4.5 V,
II = 18 mA
1.2
1.2
1.2
V
VCC = 4.5 V,
IOH = 3 mA
2.5
2.5
2.5
VOH
VCC = 5 V,
IOH = 3 mA
3
3
3
V
VOH
VCC = 4 5 V
IOH = 24 mA
2
2
V
VCC = 4.5 V
IOH = 32 mA
2*
2
VOL
VCC = 4 5 V
IOL = 48 mA
0.55
0.55
V
VOL
VCC = 4.5 V
IOL = 64 mA
0.55*
0.55
V
Vhys
100
mV
II
VCC = 5.5 V,
VI = VCC or GND
1
1
1
A
IOZPU
VCC = 0 to 2.1 V, VO = 0.5 V to 2.7 V, OE = X
50**
50**
50
A
IOZPD
VCC = 2.1 V to 0, VO = 0.5 V to 2.7 V, OE = X
50**
50**
50
A
IOZH
VCC = 5.5 V,
VO = 2.7 V
10
10
10
A
IOZL
VCC = 5.5 V,
VO = 0.5 V
10
10
10
A
Ioff
VCC = 0,
VI or VO
4.5 V
100
100
A
ICEX
VCC = 5.5 V, VO = 5.5 V
Outputs high
50
50
50
A
IO
VCC = 5.5 V,
VO = 2.5 V
50
140
180
50
180
50
180
mA
V
5 5 V I
0
Outputs high
5
250
250
250
A
ICC
VCC = 5.5 V, IO = 0,
VI = VCC or GND
Outputs low
22
30
30
30
mA
VI = VCC or GND
Outputs disabled
1
250
250
250
A
VCC = 5.5 V,
Outputs enabled
1.5
1.5
1.5
mA
ICC
VCC = 5.5 V,
One input at 3.4 V,
Outputs disabled
50
50
50
A
CC
Other inputs at VCC or GND
Control inputs
1.5
1.5
1.5
mA
Ci
VI = 2.5 V or 0.5 V
3
pF
Co
VO = 2.5 V or 0.5 V
6
pF
* On products compliant to MIL-PRF-38535, this parameter does not apply.
** On products compliant to MIL-PRF-38535, this parameter is not production tested.
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.
This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
L
= 50 pF (unless otherwise noted) (see Figure 1)
FROM
TO
SN54ABT541
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
TA = 25
C
MIN
MAX
UNIT
MIN
TYP
MAX
tPLH
A
Y
1
2.6
4.1
1
4.6
ns
tPHL
A
Y
1
2.9
4.2
1
4.7
ns
tPZH
OE
Y
1.1
3.1
4.8
1.1
5.4
ns
tPZL
OE
Y
2.1
4.4
5.9
2.1
7
ns
tPHZ
OE
Y
2.1
5.1
6.6
2.1
7.5
ns
tPLZ
OE
Y
1.7
4.7
6.2
1.7
6.7
ns
SN54ABT541, SN74ABT541B
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS093K JANUARY 1991 REVISED OCTOBER 1998
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
L
= 50 pF (unless otherwise noted) (see Figure 1)
SN74ABT541B
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
TA = 25
C
MIN
MAX
UNIT
MIN
TYP
MAX
tPLH
A
Y
1
2
3.2
1
3.6
ns
tPHL
A
Y
1
2.6
3.5
1
3.9
ns
tPZH
OE
Y
2
3.5
4.5
2
4
ns
tPZL
OE
Y
1.9
4
5.1
1.9
5.9
ns
tPHZ
OE
Y
2.2
4.4
5.4
2.2
5.8
ns
tPLZ
OE
Y
1.5
3
4
1.5
4.4
ns
tsk(o)
0.5
0.5
ns
Skew between any two outputs of the same package switching in the same direction
SN54ABT541, SN74ABT541B
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS093K JANUARY 1991 REVISED OCTOBER 1998
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
1.5 V
th
tsu
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
7 V
Open
GND
500
500
Data Input
Timing Input
1.5 V
3 V
0 V
1.5 V
1.5 V
3 V
0 V
3 V
0 V
1.5 V
tw
Input
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
VOLTAGE WAVEFORMS
PULSE DURATION
tPLH
tPHL
tPHL
tPLH
VOH
VOH
VOL
VOL
1.5 V
1.5 V
3 V
0 V
1.5 V
1.5 V
Input
1.5 V
Output
Control
Output
Waveform 1
S1 at 7 V
(see Note B)
Output
Waveform 2
S1 at Open
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
1.5 V
1.5 V
3.5 V
0 V
1.5 V
VOL + 0.3 V
1.5 V
VOH 0.3 V
0 V
3 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
Output
Output
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
7 V
Open
TEST
S1
NOTES: A. CL includes probe and jig capacitance.
B. 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.
C. All input pulses are supplied by generators having the following characteristics: PRR
10 MHz, ZO = 50
, tr
2.5 ns, tf
2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
1.5 V
Figure 1. Load Circuit and Voltage Waveforms
IMPORTANT NOTICE
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any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL
APPLICATIONS"). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER'S RISK.
In order to minimize risks associated with the customer's applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
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semiconductor products or services might be or are used. TI's publication of information regarding any third
party's products or services does not constitute TI's approval, warranty or endorsement thereof.
Copyright
1998, Texas Instruments Incorporated
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