SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
•
•
SN54ALS244C, SN54AS244A . . . J PACKAGE
SN74ALS244C, SN74AS244A . . . DW OR N PACKAGE
(TOP VIEW)
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
pnp Inputs Reduce dc Loading
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic (N)
and Ceramic (J) 300-mil DIPs
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
description
These octal buffers and line drivers are designed
specifically to improve the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and
transmitters. With the ′ALS240A, ′ALS241C,
′AS240A, and ′AS241A, these devices provide the
choice of selected combinations of inverting
outputs, symmetrical active-low output-enable
(OE) inputs, and complementary OE and OE
inputs.
1
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
20
11
2Y4
1A1
1OE
VCC
SN54ALS244C, SN54AS244A . . . FK PACKAGE
(TOP VIEW)
1A2
2Y3
1A3
2Y2
1A4
The -1 version of SN74ALS244C is identical to the
standard version, except that the recommended
maximum IOL for the -1 version is 48 mA. There is
no -1 version of the SN54ALS244C.
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
1Y1
2A4
1Y2
2A3
1Y3
2Y1
GND
2A1
1Y4
2A2
The SN54ALS244C and SN54AS244A are
characterized for operation over the full military
temperature range of – 55°C to 125°C. The
SN74ALS244C
and
SN74AS244A
are
characterized for operation from 0°C to 70°C.
2OE
•
FUNCTION TABLE
(each buffer)
INPUTS
OE
A
OUTPUT
Y
L
H
H
L
L
L
H
X
Z
Copyright © 1995, 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
