The CY74FCT257T has four identical two-input multiplexers that select four bits of data from two sources under the control of a common data-select (S) input. The I0 inputs are selected when S is low, and the I1 inputs are selected when S is high. Data at the output is noninverted.
The CY74FCT257T is a logic implementation of a four-pole, two-position switch, where the position of the switch is determined by the logic levels at S. Outputs are in the high-impedance state when the output-enable (OE\) input is high.
All but one device must be in the high-impedance state to avoid currents exceeding the maximum ratings if outputs are tied together. OE\ inputs must ensure that there is no overlap when outputs of 3-state devices are tied together.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
| Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | Quad 2-Input Multiplexer With 3-State Outputs datasheet (Rev. D) | 02 nov 2001 | |
| Selection guide | Logic Guide (Rev. AB) | 12 jun 2017 | ||
| Application note | Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) | 02 dic 2015 | ||
| User guide | LOGIC Pocket Data Book (Rev. B) | 16 ene 2007 | ||
| Application note | Semiconductor Packing Material Electrostatic Discharge (ESD) Protection | 08 jul 2004 | ||
| Application note | Selecting the Right Level Translation Solution (Rev. A) | 22 jun 2004 | ||
| User guide | CYFCT Parameter Measurement Information | 02 abr 2001 | ||
| Selection guide | Advanced Bus Interface Logic Selection Guide | 09 ene 2001 |
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El módulo de evaluación 14-24-LOGIC-EVM (EVM) está diseñado para admitir cualquier dispositivo lógico que esté en un encapsulado D, DW, DB, NS, PW, DYY o DGV de 14 a 24 pines.
| Paquete | Pasadores | Descargar |
|---|---|---|
| SOIC (D) | 16 | Ver opciones |
| SOIC (DW) | 16 | Ver opciones |
| SSOP (DBQ) | 16 | Ver opciones |
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