|
|
PDF HC257 Data sheet ( Hoja de datos )
| Número de pieza | HC257 | |
| Descripción | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs | |
| Fabricantes | System Logic Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de HC257 (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
|
No Preview Available !
SL74HC257
Quad 2-Input Data Selector/Multiplexer
with 3-State Outputs
High-Performance Silicon-Gate CMOS
The SL74HC257 is identical in pinout to the LS/ALS257. The device
inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
This device selects a (4-bit) nibble from either the A or B inputs as
determined by the Select input. The nibble is presented at the outputs
in noninverted from when the Output Enable pin is at a low level. A
high level on the Output Enable pin switches the outputs into the high-
impedance state.
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 µA
• High Noise Immunity Characteristic of CMOS Devices
LOGIC DIAGRAM
ORDERING INFORMATION
SL74HC257N Plastic
SL74HC257D SOIC
TA = -55° to 125° C for all packages
PIN ASSIGNMENT
PIN 16 =VCC
PIN 8 = GND
SLS
System Logic
Semiconductor
FUNCTION TABLE
Inputs
Outputs
Output
Enable
Select
Y0-Y3
H XZ
L L A0-A3
L H B0-B3
X=don’t care
Z = high-impedance state
A0-A3,B0-B3=the levels of the respective
Nibble Inputs
1 page  
SL74HC257
Figure 3. Switching Waveforms
Figure 4. Test Circuit
Figure 5. Test Circuit
EXPANDED LOGIC DIAGRAM
SLS
System Logic
Semiconductor
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet HC257.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HC2500 | Multi Purpose Low Distortion 7-Ampere Operational Amplifier |  Harris |
| HC2500A03 | Hybrid Coupler |  Yantel |
| HC2500E03 | Hybrid Coupler | Yantel |
| HC2500P03 | Hybrid Coupler | Yantel |
| 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 |