Datasheet

SN54ALS38B, SN74ALS38B
QUADRUPLE 2-INPUT POSITIVE-NAND BUFFERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS196B – APRIL 1982 – REVISED DECEMBER 1994
Copyright  1994, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
• Package Options Include Plastic
Small-Outline (D) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
description
These devices contain four independent 2-input
positive-NAND buffers with open-collector
outputs. They perform the Boolean functions
Y = A
• B or Y = A + B in positive logic. The
open-collector outputs require pullup resistors to
perform correctly. These outputs may be
connected to other open-collector outputs to
implement active-low wired-OR or active-high
wired-AND functions. Open-collector devices
often are used to generate higher V
OH
levels.
The SN54ALS38B is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74ALS38B is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
(each gate)
INPUTS
OUTPUT
A B
Y
H H L
L XH
XLH
logic symbol
†
logic diagram (positive logic)
1
1A
2
1B
4
2A
5
2B
9
3A
10
3B
12
4A
13
4B
1Y
3
2Y
6
3Y
8
4Y
11
&
1
1A
2
1B
4
2A
5
2B
9
3A
10
3B
12
4A
13
4B
1Y
3
2Y
6
3Y
8
4Y
11
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
SN54ALS38B ...J PACKAGE
SN74ALS38B ...D OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1A
1B
1Y
2A
2B
2Y
GND
V
CC
4B
4A
4Y
3B
3A
3Y
SN54ALS38B . . . FK PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
4A
NC
4Y
NC
3B
1Y
NC
2A
NC
2B
1B 1A NC
3Y 3A
V 4B
2Y
NC
CC
NC – No internal connection
GND
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.