74AC11240
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
SCAS448A 鈥?MAY 1987 鈥?REVISED APRIL 1996
D
D
D
D
D
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin V
CC
and GND Configurations
Minimize High-Speed Switching Noise
EPIC
t
(Enhanced-Performance Implanted
CMOS) 1-
m
m Process
500-mA Typical Latch-Up Immunity at
125擄C
Package Options Include Plastic
Small-Outline (DW) and Shrink
Small-Outline (DB) Packages, and Standard
Plastic 300-mil DIPs (NT)
DB, DW, OR NT PACKAGE
(TOP VIEW)
description
This octal buffer/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.
1Y1
1Y2
1Y3
1Y4
GND
GND
GND
GND
2Y1
2Y2
2Y3
2Y4
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
1OE
1A1
1A2
1A3
1A4
V
CC
V
CC
2A1
2A2
2A3
2A4
2OE
The 74AC11240 is organized as two 4-bit buffers/line drivers with separate OE inputs. When OE is low, the
device passes inverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
The 74AC11240 is characterized for operation from 鈥?0擄C to 85擄C.
FUNCTION TABLE
(each buffer)
INPUTS
OE
L
L
H
A
H
L
X
OUTPUT
Y
L
H
Z
logic symbol
鈥?/div>
1OE
1A1
1A2
1A3
1A4
24
23
22
21
20
EN
1
1
2
3
4
1Y1
1Y2
1Y3
1Y4
2OE
2A1
2A2
2A3
2A4
13
17
16
15
14
EN
1
9
10
11
12
2Y1
2Y2
2Y3
2Y4
鈥?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.
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
漏
1996, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1
1
2
3
4
5
6
