Datasheet SP483, SP485 (MaxLinear) - 8
| Fabricante | MaxLinear |
| Descripción | Low Power Half-Duplex RS-485 Transceivers |
| Páginas / Página | 12 / 8 — DESCRIPTION. SP483. SP485. Receivers. SP483 and SP485. Exar. Drivers. … |
| Formato / tamaño de archivo | PDF / 526 Kb |
| Idioma del documento | Inglés |
DESCRIPTION. SP483. SP485. Receivers. SP483 and SP485. Exar. Drivers. Shutdown Mode
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DESCRIPTION
The
SP483
and
SP485
are half-duplex
Receivers
differential transceivers that meet the
SP483 and SP485
requirements of RS-485 and RS-422. Fabricated with an
Exar
proprietary BiCMOS The
SP483
and
SP485
receivers have process, this product requires a fraction of differential inputs with an input sensitivity the power of older bipolar designs. as low as ±200mV. Input impedance of the receivers is typically 15kΩ (12kΩ minimum). The RS-485 standard is ideal for multi-drop A wide common mode range of -7V to +12V applications and for long-distance interfaces. allows for large ground potential differences RS-485 allows up to 32 drivers and 32 between systems. The receivers of the receivers to be connected to a data bus,
SP483
and
SP485
have a tri-state enable making it an ideal choice for multi-drop control pin. A logic LOW on RE (pin 2) will applications. Since the cabling can be enable the receiver, a logic HIGH on RE (pin as long as 4,000 feet, RS-485 transceivers 2) will disable the receiver. are equipped with a wide (-7V to +12V) common mode range to accommodate The receiver for the
SP485
will operate ground potential differences. Because up to at least 10Mbps. The
SP483
receiver RS-485 is a differential interface, data is is rated for data rates up to 250kbps. virtually immune to noise in the transmission The receiver for each of the three devices line. is equipped with the fail-safe feature. Fail-safe guarantees that the receiver
Drivers
output will be in a HIGH state when the input
SP483 and SP485
is left unconnected and floating. The driver outputs of the
SP483
and
SP485 Shutdown Mode
are differential outputs meeting the RS-485
SP483
and RS-422 standards. The typical voltage output swing with no load will be 0 Volts to The
SP483
is equipped with a Shutdown +5 Volts. With worst case loading of 54Ω mode. To enable the shutdown state, across the differential outputs, the drivers can both driver and receiver must be disabled maintain greater than 1.5V voltage levels. simultaneously. A logic LOW on DE (pin 3) The drivers of the
SP483
and
SP485
have and a Logic HIGH on RE (pin 2) will put the an enable control line which is active HIGH.
SP483
into Shutdown mode. In Shutdown, A logic HIGH on DE (pin 3) will enable the supply current will drop to typically 1µA. differential driver outputs. A logic LOW on the DE(pin 3) will tri-state the driver outputs. The transmitters of the
SP485
will operate up to at least 5Mbps. The
SP483
has internally slew rate limited driver outputs to minimize EMI. The maximum data rate for the
SP483
driver is 250kbps. 236DSR00 8 Rev. 1.0.3
The
SP483
and
SP485
are half-duplex
Receivers
differential transceivers that meet the
SP483 and SP485
requirements of RS-485 and RS-422. Fabricated with an
Exar
proprietary BiCMOS The
SP483
and
SP485
receivers have process, this product requires a fraction of differential inputs with an input sensitivity the power of older bipolar designs. as low as ±200mV. Input impedance of the receivers is typically 15kΩ (12kΩ minimum). The RS-485 standard is ideal for multi-drop A wide common mode range of -7V to +12V applications and for long-distance interfaces. allows for large ground potential differences RS-485 allows up to 32 drivers and 32 between systems. The receivers of the receivers to be connected to a data bus,
SP483
and
SP485
have a tri-state enable making it an ideal choice for multi-drop control pin. A logic LOW on RE (pin 2) will applications. Since the cabling can be enable the receiver, a logic HIGH on RE (pin as long as 4,000 feet, RS-485 transceivers 2) will disable the receiver. are equipped with a wide (-7V to +12V) common mode range to accommodate The receiver for the
SP485
will operate ground potential differences. Because up to at least 10Mbps. The
SP483
receiver RS-485 is a differential interface, data is is rated for data rates up to 250kbps. virtually immune to noise in the transmission The receiver for each of the three devices line. is equipped with the fail-safe feature. Fail-safe guarantees that the receiver
Drivers
output will be in a HIGH state when the input
SP483 and SP485
is left unconnected and floating. The driver outputs of the
SP483
and
SP485 Shutdown Mode
are differential outputs meeting the RS-485
SP483
and RS-422 standards. The typical voltage output swing with no load will be 0 Volts to The
SP483
is equipped with a Shutdown +5 Volts. With worst case loading of 54Ω mode. To enable the shutdown state, across the differential outputs, the drivers can both driver and receiver must be disabled maintain greater than 1.5V voltage levels. simultaneously. A logic LOW on DE (pin 3) The drivers of the
SP483
and
SP485
have and a Logic HIGH on RE (pin 2) will put the an enable control line which is active HIGH.
SP483
into Shutdown mode. In Shutdown, A logic HIGH on DE (pin 3) will enable the supply current will drop to typically 1µA. differential driver outputs. A logic LOW on the DE(pin 3) will tri-state the driver outputs. The transmitters of the
SP485
will operate up to at least 5Mbps. The
SP483
has internally slew rate limited driver outputs to minimize EMI. The maximum data rate for the
SP483
driver is 250kbps. 236DSR00 8 Rev. 1.0.3