SN54ABT241, SN74ABT241A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS184D – JANUARY 1991 – REVISED JANUARY 1997
D
D
D
D
D
D
State-of-the-Art
EPIC-
ΙΙ
B
™
BiCMOS Design
Significantly Reduces Power Dissipation
Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD-17
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Typical V
OLP
(Output Ground Bounce) < 1 V
at V
CC
= 5 V, T
A
= 25°C
High-Drive Outputs (–32-mA I
OH
, 64-mA I
OL
)
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK),
Plastic (N) and Ceramic (J) DIPs, and
Ceramic Flat (W) Package
SN54ABT241 . . . J OR W PACKAGE
SN74ABT241A . . . DB, DW, N, OR PW PACKAGE
(TOP VIEW)
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
SN54ABT241 . . . FK PACKAGE
(TOP VIEW)
description
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 SN54ABT240,
SN74ABT240A, and ’ABT244A, these devices
provide the choice of selected combinations of
inverting and noninverting outputs, symmetrical
active-low output-enable (OE) inputs, and
complementary OE and OE inputs.
1A2
2Y3
1A3
2Y2
1A4
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
2Y4
1A1
1OE
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
To ensure the high-impedance state during power up or power down, 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. OE
should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the
current-sourcing capability of the driver.
The SN54ABT241 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74ABT241A is characterized for operation from –40°C to 85°C.
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-ΙΙB is a trademark of 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.
Copyright
©
1997, Texas Instruments Incorporated
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
2Y1
GND
2A1
1Y4
2A2
1
SN54ABT241, SN74ABT241A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS184D – JANUARY 1991 – REVISED JANUARY 1997
FUNCTION TABLES
INPUTS
1OE
L
L
H
1A
H
L
X
OUTPUT
1Y
H
L
Z
INPUTS
2OE
H
H
L
2A
H
L
X
OUTPUT
2Y
H
L
Z
logic symbol
†
1OE
1
EN
18
16
14
12
2OE
19
EN
9
7
5
3
1A1
1A2
1A3
1A4
2
4
6
8
1Y1
1Y2
1Y3
1Y4
2A1
2A2
2A3
2A4
11
13
15
17
2Y1
2Y2
2Y3
2Y4
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
1OE
1
2OE
19
1A1
2
18
1Y1
2A1
11
9
2Y1
1A2
4
16
1Y2
2A2
13
7
2Y2
1A3
6
14
1Y3
2A3
15
5
2Y3
1A4
8
12
1Y4
2A4
17
3
2Y4
2
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
SN54ABT241, SN74ABT241A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS184D – JANUARY 1991 – REVISED JANUARY 1997
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
: SN54ABT241 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74ABT241A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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,
θ
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 EIA/JEDEC Std JESD51, except for through-hole packages,
which use a trace length of zero.
recommended operating conditions (see Note 3)
SN54ABT241
MIN
VCC
VIH
VIL
VI
IOH
IOL
∆t/∆v
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Outputs enabled
–55
0
4.5
2
0.8
VCC
–24
48
5
125
–40
0
MAX
5.5
SN74ABT241A
MIN
4.5
2
0.8
VCC
–32
64
5
85
MAX
5.5
UNIT
V
V
V
V
mA
mA
ns/V
°C
TA
Operating free-air temperature
NOTE 3: Unused inputs must be held high or low to prevent them from floating.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
3
SN54ABT241, SN74ABT241A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS184D – JANUARY 1991 – REVISED JANUARY 1997
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 5 V,
VCC = 4 5 V
4.5
VOL
Vhys
II
IOZH
IOZL
Ioff
ICEX
IO‡
ICC
VCC = 4 5 V
4.5
TEST CONDITIONS
II = –18 mA
IOH = –3 mA
IOH = –3 mA
IOH = –24 mA
IOH = –32 mA
IOL = 48 mA
IOL = 64 mA
100
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 0,
VCC = 5.5 V, VO = 5.5 V
VCC = 5.5 V,
VCC = 5.5 V, IO = 0
55V
0,
VI = VCC or GND
VI = VCC or GND
VO = 2.7 V
VO = 0.5 V
VI or VO
≤
4.5 V
Outputs high
VO = 2.5 V
Outputs high
Outputs low
Outputs disabled
–50
–100
1
24
0.5
±1
10
–10
±100
50
–180
250
30
250
1.5
0.05
1.5
4
5.5
–50
50
–180
250
30
250
1.5
0.05
1.5
–50
±1
10
–10
±1
10
–10
±100
50
–180
250
30
250
1.5
0.05
1.5
pF
pF
mA
TA = 25°C
MIN TYP†
MAX
–1.2
2.5
3
2
2*
0.55
0.55*
0.55
0.55
2.5
3
2
2
V
mV
µA
µA
µA
µA
µA
mA
µA
mA
µA
SN54ABT241
MIN
MAX
–1.2
2.5
3
V
SN74ABT241A
MIN
MAX
–1.2
UNIT
V
VOH
∆I
CC§
Data
inputs
Control
inputs
VCC = 5.5 V,
Outputs enabled
One input at 3.4 V,
,
Other inputs at
Outputs disabled
VCC or GND
VCC = 5.5 V, One input at 3.4 V,
Other inputs at VCC or GND
VI = 2.5 V or 0.5 V
VO = 2.5 V or 0.5 V
Ci
Co
* On products compliant to MIL-PRF-38535, this parameter does not apply.
† 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.
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
SN54ABT241, SN74ABT241A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS184D – JANUARY 1991 – REVISED JANUARY 1997
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
L
= 50 pF (unless otherwise noted) (see Figure 1)
SN54ABT241
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
TA = 25°C
MIN
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
A
Y
Y
Y
1
1
1.1
1.3
1.1
1
TYP
2.6
2.9
4.8
4.3
4.6
3.9
MAX
4.1
4.2
6.3
5.8
6.1
5.4
0.8
0.8
1
1
0.8
0.8
5.3
5
7
7
7.9
6.2
ns
ns
ns
MIN
MAX
UNIT
OE or OE
OE or OE
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C
L
= 50 pF (unless otherwise noted) (see Figure 1)
SN74ABT241A
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
TA = 25°C
MIN
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
A
Y
Y
Y
1
1
1.1
1.3
1.6
1
TYP
2.6
2.9
4.8
4.3
4.6
3.9
MAX
4.1
4.4
6.3
5.8
6.1
5.4
1
1
1.1
1.3
1.6
1
4.6
4.6
6.8
6.8
7.1
5.9
ns
ns
ns
MIN
MAX
UNIT
OE or OE
OE or OE
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
5
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