|
|
PDF 74LS49 Data sheet ( Hoja de datos )
| Número de pieza | 74LS49 | |
| Descripción | DUAL DECADE COUNTER | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de 74LS49 (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
|
No Preview Available !
DUAL DECADE COUNTER
The SN54 / 74LS490 contains a pair of high-speed 4-stage ripple counters.
Each half of the SN54 / 74LS490 has individual Clock, Master Reset and Mas-
ter Set (Preset 9) inputs. Each section counts in the 8, 4, 2, 1 BCD code.
• Dual Version of SN54 / 74LS490
• Individual Asynchronous Clear and Preset to 9 for Each Counter
• Count Frequency — Typically 65 MHz
• Input Clamp Diodes Limit High-Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC CPb MRb Q0b MSb Q1b Q2b Q3b
16 15 14 13 12 11 10 9
1 2 3 4 56
78
CPa MRa Q0a MSa Q1a Q2a Q3a GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
MS
MR
CP
Q0 – Q3
Master Set (Set to 9) Input
Master Reset
Clock Input (Active LOW Going Edge)
Counter Outputs (Note b)
0.5 U.L.
0.5 U.L.
1.5 U.L.
10 U.L.
0.25 U.L.
0.25 U.L.
1.5 U.L.
5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial
(74) Temperature Ranges.
LOGIC DIAGRAM (ONE HALF SHOWN)
4
MS
12
1
CP 15
2
MR
14
KJ
CD SD
Q
3 Q0 13
KJ
CD
Q
KJ
CD
Q
5 Q1 11
6 Q2 10
K CP J
CD SD
Q
7 Q3 9
SN54/74LS490
DUAL DECADE COUNTER
LOW POWER SCHOTTKY
16
1
16
1
16
1
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
TRUTH TABLE
OUTPUTS
COUNT
0
1
2
Q3 Q2 Q1
LLL
LLL
L LH
3 LLH
4 LHL
5 LHL
6 LHH
7 LHH
8 HLL
9 HLL
Q0
L
H
L
H
L
H
L
H
L
H
FAST AND LS TTL DATA
5-563
1 page  
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different
applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does
not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in
systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of
the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such
unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless
against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
Literature Distribution Centers:
USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036.
EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England.
JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan.
ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong.
◊ FAST AND LS TTL DATA
5-567
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet 74LS49.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| 74LS40 | DUAL 4-INPUT NAND BUFFER | Motorola Semiconductors |
| 74LS42 | Multipurpose Decoder / LOW POWER SCHOTTKY |  ON Semiconductor |
| 74LS42 | BCD-to-Decimal Decoder |  Hitachi Semiconductor |
| 74LS42 | BCD-to-decimal Decoders |  National 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 |