54AC11240, 74AC11240
OCTAL BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCAS169 – MAY 1987 – REVISED APRIL 1993
54AC11240 . . . JT PACKAGE
74AC11240 . . . DB, DW OR NT PACKAGE
• Flow-Through Architecture Optimizes
PCB Layout
(TOP VIEW)
• Center-Pin V
and GND Configurations
Minimize High-Speed Switching Noise
CC
1
24
23
22
21
20
19
18
17
16
15
14
13
1Y1
1Y2
1Y3
1G
• EPIC (Enhanced-Performance Implanted
2
1A1
1A2
1A3
1A4
CMOS) 1- m Process
3
• 500-mA Typical Latch-Up Immunity
at 125°C
4
1Y4
5
GND
GND
GND
GND
2Y1
2Y2
2Y3
2Y4
6
V
• Package Options Include Plastic Small-
Outline Packages, Plastic Shrink
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
CC
7
V
CC
8
2A1
2A2
2A3
2A4
2G
9
10
11
12
description
These octal buffers/line drivers are designed
specifically to improve both the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and transmit-
ters. These devices provide inverting outputs and
symmetrical G (active-low output control) inputs.
These devices feature high fan-out and improved
fan-in.
54AC11240 . . . FK PACKAGE
(TOP VIEW)
4
3
2 1 28 27 26
5
25
24
23
22
21
20
19
1A2
1A1
1G
2A3
2A4
2G
6
7
The 54AC11240 is characterized for operation
over the full military temperature range of – 55°C
to 125°C. The 74AC11240 is characterized for
operation from – 40°C to 85°C.
8
NC
NC
9
1Y1
1Y2
1Y3
2Y4
2Y3
2Y2
10
11
12 13 14 15 16 17 18
†
logic symbol
24
1G
EN
NC – No internal connection
23
22
21
20
1
2
3
4
1
1Y1
1Y2
1Y3
1Y4
1A1
1A2
1A3
1A4
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
13
Y
G
A
H
L
2G
EN
L
L
L
H
Z
17
16
15
14
9
10
11
12
1
2Y1
2Y2
2Y3
2Y4
2A1
2A2
2A3
2A4
H
X
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Pin numbers shown are for the DW, JT, and NT packages.
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.
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265