DataSheet.es    


PDF DS36C279TM Data sheet ( Hoja de datos )

Número de pieza DS36C279TM
Descripción Low Power EIA-RS-485 Transceiver with Sleep Mode
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



Hay una vista previa y un enlace de descarga de DS36C279TM (archivo pdf) en la parte inferior de esta página.


Total 10 Páginas

No Preview Available ! DS36C279TM Hoja de datos, Descripción, Manual

July 1998
DS36C279
Low Power EIA-RS-485 Transceiver with Sleep Mode
General Description
The DS36C279 is a low power differential bus/line trans-
ceiver designed to meet the requirements of RS-485 Stan-
dard for multipoint data transmission. In addition it is compat-
ible with TIA/EIA-422-B.
The sleep mode feature automatically puts the device in a
power saving mode when both the driver and receiver are
disabled.†† The device is ideal for use in power conscious
applications where the device may be disabled for extended
periods of time.
The driver and receiver outputs feature TRI-STATE® capabil-
ity. The driver outputs operate over the entire common mode
range of −7V to +12V. Bus contention or fault situations that
cause excessive power dissipation within the device are
handled by a thermal shutdown circuit, which forces the
driver outputs into a high impedance state.
The receiver incorporates a fail safe circuit which guarantees
a high output state when the inputs are left open.
The DS36C279T is fully specified over the industrial tem-
perature range (−40˚C to +85˚C).
Features
n 100% RS-485 compliant
— Guaranteed RS-485 device interoperation
n Low power CMOS design: ICC 500 µA max
n Automatic sensing sleep mode
— Reduces ICC to 10 µA maximum
n Built-in power up/down glitch-free circuitry
— Permits live transceiver intersection/displacement
n DIP and SOIC packages available
n Industrial temperature range: −40˚C to +85˚C
n On-board thermal shutdown circuitry
— Prevents damage to the device in the event of
excessive power dissipation
n Wide common mode range: −7V to +12V
n Receive open input fail-safe (Note 1)
n 14 unit load (DS36C279): 128 nodes
n 12 unit load (DS36C279T): 64 nodes
n ESD (Human Body Model): 2 kV
n Drop-in replacement for:
— LTC485 MAX485 DS75176 DS3695
Connection and Logic Diagram
DS012053-1
Order Number DS36C279M, DS36C279N,
DS36C279TM or DS36C279TN
See NS Package Number M08A or N08E
Truth Table
DRIVER SECTION
RE* DE DI DO/RI DO*/RI*
X HH
H
L
X HL
L
H
X LX
Z
Z
RECEIVER SECTION
RE* DE
RI-RI*
RO
LL
+0.2V
H
LL
−0.2V
L
HL
X Z (Note 2)
L L OPEN (Note 1)
H
Note 1: Non-terminated, open input only
Note 2: Device enters sleep mode if enable conditions are held 600 ns
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS012053
www.national.com

1 page




DS36C279TM pdf
Parameter Measurement Information (Continued)
DS012053-6
FIGURE 6. Driver Differential Propagation Delays and Differential Rise and Fall Times
DS012053-7
FIGURE 7. TRI-STATE and Sleep Mode Test Circuit
(tPZH, (tPSH), tPHZ)
DS012053-10
FIGURE 10. TRI-STATE and Sleep Mode Waveforms
(tPZL, (tPSL), tPLZ)
DS012053-8
FIGURE 8. TRI-STATE and Sleep Mode Waveforms
(tPZH, (tPSH), tPHZ)
DS012053-11
FIGURE 11. Receiver VOH and VOL
DS012053-12
FIGURE 12. Receiver Differential Propagation Delay
Test Circuit
DS012053-9
FIGURE 9. TRI-STATE and Sleep Mode Test Circuit
(tPZL, (tPSL), tPLZ)
5
www.national.com

5 Page










PáginasTotal 10 Páginas
PDF Descargar[ Datasheet DS36C279TM.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
DS36C279TMLow Power EIA-RS-485 Transceiver with Sleep ModeNational Semiconductor
National Semiconductor
DS36C279TNLow Power EIA-RS-485 Transceiver with Sleep ModeNational Semiconductor
National Semiconductor

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
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,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar