Texas Instruments 74ACT11244DBLE, 74ACT11244PWR, 74ACT11244PWLE, 74ACT11244NT, 74ACT11244DWR Datasheet
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74ACT11244
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS006C – AUGUST 1987 – REVISED APRIL 1996
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
D
Inputs Are TTL-Voltage Compatible
D
Flow-Through Architecture Optimizes
PCB Layout
D
Center-Pin VCC and GND Configurations to
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), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
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. 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
DATA
INPUT
OUTPUT
1OE, 2OE
A
Y
H X Z
L L L
L H H
logic symbol
†
1OE
20
23
1A1
22
1A2
21
1A3
20
1A4
EN
24
1Y1
1
1Y2
2
1Y3
3
1Y4
4
2OE
17
2A1
16
2A2
15
2A3
14
2A4
EN
13
2Y1
9
2Y2
10
2Y3
11
2Y4
12
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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, NT, OR PW PACKAGE
(TOP VIEW)
74ACT11244
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS006C – AUGUST 1987 – REVISED APRIL 1996
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
24
23
22
21
20
13
17
16
15
14
12
11
10
9
4
3
2
1
1A1
1A2
1A3
1A4
1Y1
2A1
2A2
2A3
2A4
2Y1
1Y2
1Y3
1Y4
2Y2
2Y3
2Y4
1OE
2OE
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 VCC+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, VO (see Note 1) –0.5 V to VCC+ 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. . . . . . . . . . . . . . . . . . .
PW package 0.7 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 MAX UNIT
V
CC
Supply voltage 4.5 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
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