The CY74FCT652T consists of bus transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal storage registers. GAB and GBA\ inputs control the transceiver functions. Select-control (SAB and SBA) inputs select either real-time or stored-data transfer. The circuitry used for select control eliminates the typical decoding glitch that occurs in a multiplexer during the transition between stored and real-time data. A low input level selects real-time data, and a high input level selects stored data.
Data on the A or B data bus, or both, can be stored in the internal D-type flip-flops by low-to-high transitions of the appropriate clock (CPAB or CPBA) inputs, regardless of the select or enable levels of the control pins. When SAB and SBA are in the real-time transfer mode, it also is possible to store data without using the internal D-type flip-flops by simultaneously enabling GAB and GBA\. In this configuration, each output reinforces its input. Thus, when all other data sources to the two sets of bus lines are at high impedance, each set of bus lines remains at its last state.
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 | 8-Bit Registered Transceiver With 3-State Outputs datasheet (Rev. B) | 24 oct 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 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
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.
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| SOIC (DW) | 24 | Ultra Librarian |
| SSOP (DBQ) | 24 | Ultra Librarian |
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