Datenblatt-pdf.com


DM74ALS390 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer DM74ALS390
Beschreibung Dual 4-Bit Decade Counters
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 6 Seiten
DM74ALS390 Datasheet, Funktion
PRELIMINARY
April 1987
DM54ALS390 DM74ALS390 Dual 4-Bit Decade Counters
General Description
Each of these monolithic counters contains eight master-
slave flip-flops and additional gating to implement two inde-
pendent four bit counters in a single package
To use their maximum count length the B input is connect-
ed to the QA output The input count pulses are applied to
input A and the outputs are as described in the appropriate
truth table A symmetrical divide-by-ten count can be ob-
tained by connecting the QD output to the A input and ap-
plying the input count to the B input
Features
Y Switching specifications at 50 pF
Y Switching specifications guaranteed over full tempera-
ture and VCC range
Y Advanced oxide-isolated ion-implanted Schottky TTL
process
Y Individual clocks for A and B flip-flops provide dual di-
vide-by-2 and divide-by-5 counters
Y Direct clear for each 4-bit counter
Connection Diagram
TL F 9169 – 1
Order Number DM54ALS390J DM74ALS390M or
DM74ALS390N
See NS Package Number J16A M16A or N16A
Function Tables
BCD Count Sequence
(See Note 2)
Count
Output
QD QC QB
0 LLL
1 LLL
2 LLH
3 LLH
4 LHL
5 LHL
6 LHH
7 LHH
8 HLL
9 HLL
QA
L
H
L
H
L
H
L
H
L
H
Bi-Quinary (5-2)
(See Note 3)
Count
Output
QA QD QC QB
0 LLLL
1 LLLH
2 LLHL
3 L LHH
4 LHLL
5 HLLL
6 HLLH
7 HLHL
8 HLHH
9 HHL L
Note 2 Output QA is connected to input B for BCD count
Note 3 Output QD is connected to input A for bi-quinary count
H e High Logic Level L e Low Logic Level
This document contains information on a product under development NSC reserves the right to change or discontinue this product without notice
C1995 National Semiconductor Corporation TL F 9169
RRD-B30M105 Printed in U S A
Free Datasheet http://www.datasheet4u.net/






DM74ALS390 Datasheet, Funktion
Physical Dimensions inches (millimeters) (Continued)
Molded Dual-In-Line Package (N)
Order Number DM74ALS390N
NS Package Number N16A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
systems which (a) are intended for surgical implant
into the body or (b) support or sustain life and whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling can
be reasonably expected to result in a significant injury
to the user
2 A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system or to affect its safety or
effectiveness
National Semiconductor
Corporation
1111 West Bardin Road
Arlington TX 76017
Tel 1(800) 272-9959
Fax 1(800) 737-7018
National Semiconductor
Europe
Fax (a49) 0-180-530 85 86
Email cnjwge tevm2 nsc com
Deutsch Tel (a49) 0-180-530 85 85
English Tel (a49) 0-180-532 78 32
Fran ais Tel (a49) 0-180-532 93 58
Italiano Tel (a49) 0-180-534 16 80
National Semiconductor
Hong Kong Ltd
13th Floor Straight Block
Ocean Centre 5 Canton Rd
Tsimshatsui Kowloon
Hong Kong
Tel (852) 2737-1600
Fax (852) 2736-9960
National Semiconductor
Japan Ltd
Tel 81-043-299-2309
Fax 81-043-299-2408
National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications
Free Datasheet http://www.datasheet4u.net/

6 Page







SeitenGesamt 6 Seiten
PDF Download[ DM74ALS390 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
DM74ALS390Dual 4-Bit Decade CountersNational Semiconductor
National Semiconductor

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche