54AC11241, 74AC11241
OCTAL BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCAS032A – JULY 1987 – REVISED APRIL 1993
•
•
•
•
•
•
54AC11241 . . . JT PACKAGE
74AC11241 . . . DB, DW OR NT PACKAGE
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin VCC and GND Configurations
Minimize High-Speed Switching Noise
EPIC (Enhanced-Performance Implanted
CMOS) 1-mm Process
500-mA Typical Latch-Up Immunity
at 125°C
Package Options Include Plastic SmallOutline Packages, Plastic Shrink
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
(TOP VIEW)
1Y1
1Y2
1Y3
1Y4
GND
GND
GND
GND
2Y1
2Y2
2Y3
2Y4
t
description
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
1G
1A1
1A2
1A3
1A4
VCC
VCC
2A1
2A2
2A3
2A4
2G
54AC11241 . . . FK PACKAGE
(TOP VIEW)
1A2
1A1
1G
NC
1Y1
1Y2
1Y3
The 54AC11241 is characterized for operation
over the full military temperature range of – 55°C
to 125°C. The 74AC11241 is characterized for
operation from – 40°C to 85°C.
NC – No internal connection
1A3
1A4
VCC
NC
VCC
2A1
2A2
This octal buffer or line driver is designed
specifically to improve both the performance
and density of three-state memory address
drivers, clock drivers, and bus-oriented receivers
and transmitters.
Taken together with the
AC11240 and AC11244, these devices provide
the choice of selected combinations of inverting
and noninverting outputs, symmetrical G (activelow output control) inputs, and complementary
G and G inputs. This device features a high
fan-out.
4
5
3 2 1 28 27 26
25
6
24
7
23
8
22
9
21
10
20
1Y4
GND
GND
NC
GND
GND
2Y1
11
19
12 13 14 15 16 17 18
2A3
2A4
2G
NC
2Y4
2Y3
2Y2
FUNCTION TABLE
OUTPUT
CONTROL
1G
DATA
INPUT
1A
OUTPUT
1Y
H
X
L
L
L
H
OUTPUT
CONTROL
2G
DATA
INPUT
2A
OUTPUT
2Y
Z
L
X
Z
L
H
L
L
H
H
H
H
EPIC is a trademark of Texas Instruments Incorporated.
Copyright 1993, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
2–1
54AC11241, 74AC11241
OCTAL BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCAS032A – JULY 1987 – REVISED APRIL 1993
logic symbol†
1G
1A1
1A2
1A3
1A4
2G
2A1
2A2
2A3
2A4
24
logic diagram (positive logic)
EN
1G
23
1
22
2
21
3
20
4
13
1Y1
1A1
24
23
1
22
2
21
3
20
4
1Y1
1Y2
1Y3
1A2
1Y2
1Y4
1A3
1Y3
EN
17
9
16
10
15
11
14
12
1A4
1Y4
2Y1
2Y2
2G
13
2Y3
2Y4
† This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
2A1
17
2A2 16
2A3
2A4
9
2Y1
10 2Y2
15
11
14
12
2Y3
2Y4
Pin numbers shown are for the DW, JT, and NT packages.
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 VCC + 0.5 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 50 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 50 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 200 mA
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.
2–2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
54AC11241, 74AC11241
OCTAL BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCAS032A – JULY 1987 – REVISED APRIL 1993
recommended operating conditions
54AC11241
VCC
Supply voltage
VIH
High-level input voltage
VCC = 3 V
VCC = 4.5 V
VCC = 5.5 V
VCC = 3 V
MIN
NOM
MAX
3
5
5.5
0
TA
Operating free-air temperature
5.5
3.85
Output voltage
Input transition rise or fall rate
5
3.15
0
Dt /Dv
3
3.85
Input voltage
Low-level output current
MAX
3.15
VI
VO
IOL
NOM
2.1
Low-level input voltage
High-level output current
MIN
2.1
VIL
IOH
74AC11241
VCC = 4.5 V
VCC = 5.5 V
V
V
0.9
9.9
1.35
1.35
1.65
V
1.65
VCC
VCC
VCC = 3 V
VCC = 4.5 V
UNIT
0
VCC
VCC
0
–4
–4
– 24
– 24
VCC = 5.5 V
VCC = 3 V
– 24
– 24
12
12
VCC = 4.5 V
VCC = 5.5 V
24
24
24
24
Data
0
10
0
10
G
0
5
0
5
– 55
125
– 40
85
V
V
mA
mA
ns/ V
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = – 50 mA
VOH
IOH = – 4 mA
IOH = – 24 mA
IOH = – 50 mA{
IOH = – 75 mA{
IOL = 50 mA
VOL
IOL = 12 mA
IOL = 24 mA
IOL = 50 mA{
IOL = 75 mA{
VCC
MIN
TA = 25°C
TYP
MAX
54AC11241
MIN
MAX
74AC11241
MIN
3V
2.9
2.9
2.9
4.5 V
4.4
4.7
4.4
5.5 V
5.4
5.4
5.4
3V
2.58
2.4
2.48
4.5 V
3.94
3.7
3.8
5.5 V
4.94
4.7
4.8
5.5 V
MAX
V
3.85
5.5 V
3.85
3V
0.1
0.1
0.1
4.5 V
0.1
0.1
0.1
5.5 V
0.1
0.1
0.1
3V
0.36
0.5
0.44
4.5 V
0.36
0.5
0.44
5.5 V
0.36
0.5
0.44
5.5 V
1.65
IOZ
II
VO = VCC or GND
VI = VCC or GND
5.5 V
± 0.5
5.5 V
ICC
Ci
VI = VCC or GND, IO = 0
VI = VCC or GND
5.5 V
± 10
±5
± 0.1
±1
±1
8
160
80
4
Co
VO = VCC or GND
5V
10
† Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
POST OFFICE BOX 655303
V
1.65
5.5 V
5V
UNIT
• DALLAS, TEXAS 75265
mA
mA
mA
pF
pF
2–3
54AC11241, 74AC11241
OCTAL BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCAS032A – JULY 1987 – REVISED APRIL 1993
switching characteristics over recommended operating free-air temperature range,
VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
tPLH
tPHL
A
Y
tPZH
tPZL
G or G
Y
tPHZ
tPLZ
G or G
Y
MIN
TA = 25°C
TYP
MAX
1.5
7
1.5
54AC11241
74AC11241
MIN
MAX
MIN
MAX
10
1.5
12.2
1.5
11.4
6.2
8.4
1.5
10.2
1.5
9.2
1.5
7.8
11.4
1.5
13.8
1.5
12.9
1.5
7.7
10.6
1.5
12.6
1.5
11.7
1.5
5.8
7.6
1.5
8.2
1.5
7.9
1.5
7.1
9.3
1.5
10.3
1.5
9.9
UNIT
ns
ns
ns
switching characteristics over recommended operating free-air temperature range,
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
tPLH
tPHL
A
Y
tPZH
tPZL
G or G
Y
tPHZ
tPLZ
G or G
Y
TA = 25°C
MIN
TYP
MAX
54AC11241
74AC11241
MIN
MAX
MIN
MAX
1.5
4.9
7.1
1.5
8.5
1.5
8
1.5
4.5
6.3
1.5
7.2
1.5
6.8
1.5
5.4
8
1.5
9.7
1.5
9
1.5
5.3
7.6
1.5
9
1.5
8.4
1.5
4.9
6.6
1.5
7.2
1.5
6.9
1.5
5.6
7.5
1.5
8.3
1.5
8
UNIT
ns
ns
ns
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
Cpd
d
2–4
Power dissipation capacitance per buffer
TEST CONDITIONS
Outputs enabled
Outputs disabled
POST OFFICE BOX 655303
CL = 50 pF,
pF
• DALLAS, TEXAS 75265
f = 1 MHz
TYP
26
10
UNIT
pF
54AC11241, 74AC11241
OCTAL BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCAS032A – JULY 1987 – REVISED APRIL 1993
PARAMETER MEASUREMENT INFORMATION
2 × VCC
S1
500 Ω
From Output
Under Test
Open
GND
LOAD CIRCUIT
Output
Control
(low-level
enabling)
VCC
50%
50%
0V
tPLH
tPHL
VOH
Output
S1
Open
2 × VCC
GND
50%
50%
500 Ω
CL = 50 pF
(see Note A)
Input
(see Note B)
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
50% VCC
50% VCC
VOL
VCC
0V
tPZL
Output
Waveform 2
S1 at GND
(see Note C)
[ VCC
tPLZ
Output
Waveform 1
S1 at 2 × VCC
(see Note C)
50% VCC
VOL
tPHZ
tPZH
VOLTAGE WAVEFORMS
20% VCC
50% VCC
80% VCC
VOH
[0V
VOLTAGE WAVEFORMS
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
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 input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
2–5
54AC11241, 74AC11241
OCTAL BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCAS032A – JULY 1987 – REVISED APRIL 1993
2–6
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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pertaining to warranty, patent infringement, and limitation of liability.
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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
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Copyright 1998, Texas Instruments Incorporated