Texas Instruments 74ACT11240NT, 74ACT11240DWR, 74ACT11240DW, 74ACT11240DBR, 74ACT11240DBLE Datasheet
74ACT11240
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS210A – MAY 1987 – REVISED APRIL 1996
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Inputs Are TTL-Voltage Compatible
D
Flow-Through Architecture Optimizes
PCB Layout
D
Center-Pin VCC and GND Configurations
Minimize High-Speed Switching Noise
D
EPIC
t
(Enhanced-Performance Implanted
CMOS) 1-mm Process
D
500-mA Typical Latch-Up Immunity at
125°C
D
Package Options Include Plastic
Small-Outline (DW) and Shrink
Small-Outline (DB) Packages, and Standard
Plastic 300-mil DIPs (NT)
description
This octal buffer or line driver is designed specifically to improve both the performance and density of 3-state
memory address drivers, clock drivers, and bus-oriented receivers and transmitters. This device provides
inverting outputs and symmetrical active-low output-enable (OE) inputs. This device features high fan-out and
improved fan-in.
The 74ACT11240 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
OE A
Y
L H L
L LH
H X Z
logic symbol
†
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2A4
2A3
2A2
2A1
2OE
1A4
1A3
1A2
1A1
1OE
2Y4
2Y3
2Y2
2Y1
1Y4
1Y3
1Y2
1Y1
12
11
10
9
4
3
2
1
14
15
16
17
13
EN
20
21
22
23
24
EN
1
1
Copyright 1996, 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 is a trademark of Texas Instruments Incorporated.
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
1Y1
1Y2
1Y3
1Y4
GND
GND
GND
GND
2Y1
2Y2
2Y3
2Y4
1OE
1A1
1A2
1A3
1A4
V
CC
V
CC
2A1
2A2
2A3
2A4
2OE
DB, DW, OR NT PACKAGE
(TOP VIEW)
74ACT11240
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS210A – MAY 1987 – REVISED APRIL 1996
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
1OE
24
1A1
1A2
1A3
1A4
23
22
21
20
1Y1
1Y2
1Y3
1Y4
1
2
3
4
2OE
13
2A1
2A2
2A3
2A4
17
16
15
14
2Y1
2Y2
2Y3
2Y4
9
10
11
12
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
–0.5 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI (see Note 1) –0.5 V to V
CC
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, VO (see Note 1) –0.5 V to V
CC
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0 or VI > VCC) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0 or VO > VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(V
O
= 0 to VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through VCC or GND ±200 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum power dissipation at TA = 55°C (in still air) (see Note 2):DB package 0.65 W. . . . . . . . . . . . . . . . .
DW package 1.7 W. . . . . . . . . . . . . . . . .
NT package 1.3 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 voltage ratings may be exceeded if the input and output current ratings are observed.
2. The maximum package power dissipation is calculated using a junction temperature of 150_C and a board trace length of 750 mils,
except for the NT package, which has a trace length of zero.
recommended operating conditions
MIN NOM MAX UNIT
V
CC
Supply voltage 4.5 5 5.5 V
V
IH
High-level input voltage 2 V
V
IL
Low-level input voltage 0.8 V
V
I
Input voltage 0 V
CC
V
V
O
Output voltage 0 V
CC
V
I
OH
High-level output current –24 mA
I
OL
Low-level output current 24 mA
Dt/D
v Input transition rise or fall rate 0 10 ns/V
T
A
Operating free-air temperature –40 85 °C
74ACT11240
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS210A – MAY 1987 – REVISED APRIL 1996
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
TA = 25°C
PARAMETER
TEST CONDITIONS
V
CC
MIN TYP MAX MIN MAX
UNIT
4.5 V 4.4 4.4
I
OH
= –50
m
A
5.5 V 5.4 5.4
V
OH
4.5 V 3.94 3.8
V
OH
I
OH
= –24
mA
5.5 V 4.94 4.8
IOH = –75 mA
{
5.5 V 3.85
4.5 V 0.1 0.1
I
OL
= 50
m
A
5.5 V 0.1 0.1
V
OL
4.5 V 0.36 0.44
V
OL
I
OL
=
24 mA
5.5 V 0.36 0.44
IOL = 75 mA
{
5.5 V 1.65
I
OZ
VO = VCC or GND 5.5 V ±0.5 ±5
m
A
I
I
VI = VCC or GND 5.5 V ±0.1 ±1
m
A
I
CC
VI = VCC or GND, IO = 0 5.5 V 8 80
m
A
D
I
CC
‡
One input at 3.4 V , Other inputs at GND or V
CC
5.5 V 0.9 1 mA
C
i
VI = VCC or GND 5 V 4 pF
C
o
VI = VCC or GND 5 V 10 pF
†
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
‡
This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC.
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V ± 0.5 V (unless otherwise noted)
FROM TO
TA = 25°C
PARAMETER
(INPUT) (OUTPUT)
MIN TYP MAX
MIN
MAX
UNIT
t
PLH
1.5 6.5 9.9 1.5 10.6
t
PHL
A
Y
1.5 6 8 1.5 8.7
ns
t
PZH
1.5 7.5 11.7 1.5 12.5
t
PZL
OE
Y
1.5 7.3 11.5 1.5 12.3
ns
t
PHZ
1.5 7.3 9.4 1.5 10
t
PLZ
OE
Y
1.5 7.9 10.3 1.5 10.8
ns
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
p
p
p
Outputs enabled
p
47
p
CpdPower dissipation capacitance per buffer
Outputs disabled
C
L
=
50 pF
,
f
= 1 MHz
13
pF
74ACT11240
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS210A – MAY 1987 – REVISED APRIL 1996
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
t
PHL
t
PLH
Output
Input
1.5 V 1.5 V
3 V
0 V
50% V
CC
50% V
CC
V
OH
V
OL
t
PLH/tPHL
t
PLZ/tPZL
t
PHZ/tPZH
Open
2 × V
CC
GND
TEST S1
VOLTAGE WAVEFORMS
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
2 × V
CC
500 Ω
500 Ω
GND
Open
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2 × V
CC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
V
OL
V
OH
t
PZL
t
PZH
t
PLZ
t
PHZ
1.5 V
1.5 V
[
V
CC
0 V
50% V
CC
20% V
CC
50% V
CC
80% V
CC
[
0 V
3 V
VOLTAGE WAVEFORMS
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 ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
D. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
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Copyright 1998, Texas Instruments Incorporated
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