74ACT11244
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS006C − AUGUST 1987 − REVISED APRIL 1996
D 3-State Outputs Drive Bus Lines or Buffer
DB, DW, NT, OR PW PACKAGE
(TOP VIEW)
Memory Address Registers
Inputs Are TTL-Voltage Compatible
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin VCC and GND Configurations to
Minimize High-Speed Switching Noise
EPICt (Enhanced-Performance Implanted
CMOS) 1-mm Process
500-mA Typical Latch-Up Immunity at
125°C
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, and Standard Plastic 300-mil
DIPs (NT)
D
D
D
D
D
D
1Y1
1Y2
1Y3
1Y4
GND
GND
GND
GND
2Y1
2Y2
2Y3
2Y4
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
1OE
1A1
1A2
1A3
1A4
VCC
VCC
2A1
2A2
2A3
2A4
2OE
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. Together with the
’ACT11240, this device provides the choice of various combinations of inverting and noninverting outputs.
The 74ACT11244 is characterized for operation from −40°C to 85°C.
FUNCTION TABLE
OUTPUT
ENABLE
1OE, 2OE
DATA
INPUT
A
OUTPUT
Y
H
X
Z
L
L
L
L
H
H
logic symbol†
1OE
1A1
1A2
1A3
1A4
†
24
23
2OE
EN
1
20
22
2
21
3
20
4
1Y1
2A1
1Y2
2A2
1Y3
2A3
1Y4
2A4
13
EN
17
9
16
10
15
11
14
12
2Y1
2Y2
2Y3
2Y4
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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.
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
74ACT11244
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS006C − AUGUST 1987 − REVISED APRIL 1996
logic diagram (positive logic)
1OE
1A1
1A2
1A3
1A4
24
2OE
23
22
21
20
1
2
1Y1
2A1
1Y2
2A2
1Y3
2A3
1Y4
2A4
13
17
9
16
10
15
11
14
12
3
4
2Y1
2Y2
2Y3
2Y4
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 6 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
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
PW package . . . . . . . . . . . . . . . . . . . 0.7 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 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
2
MIN
MAX
4.5
5.5
UNIT
VCC
Supply voltage
VIH
High-level input voltage
VIL
Low-level input voltage
0.8
V
VI
Input voltage
0
VCC
V
VO
Output voltage
0
VCC
V
IOH
High-level output current
−24
mA
IOL
Low-level output current
24
mA
Dt/Dv
Input transition rise or fall rate
0
10
ns/V
TA
Operating free-air temperature
−40
85
°C
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
V
V
74ACT11244
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS006C − AUGUST 1987 − REVISED APRIL 1996
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
IOH = −50
50 mA
A
VOH
24 mA
IOH = −24
IOH = −75 mA{
IOL = 24 mA
MIN
4.5 V
4.4
4.4
5.5 V
5.4
5.4
4.5 V
3.94
3.8
5.5 V
4.94
4.8
MAX
UNIT
V
3.85
4.5 V
0.1
5.5 V
0.1
0.1
0.1
4.5 V
0.36
0.44
5.5 V
0.36
0.44
V
5.5 V
IOZ
VO = VCC or GND
5.5 V
±0.5
±5
mA
II
VI = VCC or GND
5.5 V
±0.1
±1
mA
DICC
‡
MAX
IOL = 75 mA{
ICC
†
TYP
5.5 V
IOL = 50 mA
A
VOL
TA = 25°C
MIN
}
1.65
VI = VCC or GND,
IO = 0
5.5 V
8
80
mA
One input at 3.4 V,
Other inputs at GND or VCC
5.5 V
0.9
1
mA
Ci
VI = VCC or GND
5V
4
pF
Co
VO = VCC or GND
5V
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,
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
FROM
(INPUT)
TO
(OUTPUT)
A
Y
OE
Y
OE
Y
TA = 25°C
MIN
MAX
8.9
1.5
9.9
8.6
1.5
9.2
6.6
11.3
1.5
12.5
6.7
10.5
1.5
11.4
1.5
7.4
9.8
1.5
10.4
1.5
7.8
10.6
1.5
11.2
MIN
TYP
MAX
1.5
6
1.5
5.4
1.5
1.5
UNIT
ns
ns
ns
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
Outputs enabled
Cpd
Power dissipation capacitance per buffer
POST OFFICE BOX 655303
Outputs disabled
• DALLAS, TEXAS 75265
TYP
UNIT
27
CL = 50 pF,
pF
f = 1 MHz
9
pF
3
74ACT11244
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS006C − AUGUST 1987 − REVISED APRIL 1996
PARAMETER MEASUREMENT INFORMATION
2 × VCC
S1
500 Ω
From Output
Under Test
Open
GND
CL = 50 pF
(see Note A)
Output
Control
(low-level
enabling)
3V
1.5 V
1.5 V
0V
tPLH
tPHL
VOH
Output
S1
Open
2 × VCC
GND
500 Ω
LOAD CIRCUIT
Input
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
50% VCC
50% VCC
VOL
3V
0V
tPZL
tPLZ
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
1.5 V
1.5 V
50% VCC
20% VCC
VOL
tPHZ
tPZH
VOLTAGE WAVEFORMS
[ VCC
50% VCC
80% VCC
VOH
[0V
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
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
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)
(4/5)
(6)
74ACT11244DBR
ACTIVE
SSOP
DB
24
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AT244
74ACT11244DW
ACTIVE
SOIC
DW
24
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ACT11244
74ACT11244DWR
ACTIVE
SOIC
DW
24
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ACT11244
74ACT11244PW
ACTIVE
TSSOP
PW
24
60
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AT244
74ACT11244PWR
ACTIVE
TSSOP
PW
24
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AT244
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
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
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