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PDF AN158 Data sheet ( Hoja de datos )
| Número de pieza | AN158 | |
| Descripción | Serial-Data Interface Chip Supplies Bipolar Voltages | |
| Fabricantes | Macronix International | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AN158 (archivo pdf) en la parte inferior de esta página. Total 3 Páginas | ||
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INTERFACE CIRCUITS
Jul 09, 1998
Serial-Data Interface Chip Supplies Bipolar
Voltages
Some of the interface ICs currently available for serial-data transmission not only operate
from low VCC levels (5V or 3.3V); they also generate bipolar dc voltages (±6.5V to ±10V) to
support the minimum driver-output levels as specified by EIa/TIa-232. With care, you can
steal useful amounts of power from these voltage rails without interfering with the IC's
operation.
In Figure 1, the IC's switch-mode controller operates with an external inductor, two diodes,
and two capacitors to produce ±6.5V. FETs Q1 and Q2 ensure start-up for the circuit by
disconnecting the load until these switch-mode supply voltages are present. Note that Q1
must be a logic-level device.
1 page | ||
| Páginas | Total 3 Páginas | |
| PDF Descargar | [ Datasheet AN158.PDF ] | |
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