|
|
PDF DM74LS90 Data sheet ( Hoja de datos )
| Número de pieza | DM74LS90 | |
| Descripción | Decade and Binary Counters | |
| Fabricantes | National | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de DM74LS90 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
|
No Preview Available !
August 1986
Revised March 2000
DM74LS90
Decade and Binary Counters
General Description
Each of these monolithic counters contains four master-
slave flip-flops and additional gating to provide a divide-by-
two counter and a three-stage binary counter for which the
count cycle length is divide-by-five for the DM74LS90.
All of these counters have a gated zero reset and the
DM74LS90 also has gated set-to-nine inputs for use in
BCD nine’s complement applications.
To use their maximum count length (decade or four bit
binary), the B input is connected 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 symmetri-
cal divide-by-ten count can be obtained from the
DM74LS90 counters by connecting the QD output to the A
input and applying the input count to the B input which
gives a divide-by-ten square wave at output QA.
Features
s Typical power dissipation 45 mW
s Count frequency 42 MHz
Ordering Code:
Order Number Package Number
Package Description
DM74LS90M
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
DM74LS90N
N14A
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Reset/Count Truth Table
R0(1)
H
H
X
X
L
L
X
Reset Inputs
R0(2) R9(1)
HL
HX
XH
LX
XL
XX
LL
R9(2)
X
L
H
L
X
L
X
Output
QD QC QB QA
LLLL
LLLL
HL LH
COUNT
COUNT
COUNT
COUNT
© 2000 Fairchild Semiconductor Corporation DS006381
www.fairchildsemi.com
1 page  
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
Package Number M14A
5 www.fairchildsemi.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet DM74LS90.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| DM74LS90 | Decade and Binary Counters | National |
| DM74LS90 | Decade and Binary Counters |  Fairchild Semiconductor |
| DM74LS93 | Decade and Binary Counters | National |
| DM74LS93 | Decade and Binary Counters | Fairchild Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |