|
|
PDF DS14C239 Data sheet ( Hoja de datos )
| Número de pieza | DS14C239 | |
| Descripción | Dual Supply TIA/EIA-232 3 x 5 Driver/Receiver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de DS14C239 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
March 1996
DS14C239
Dual Supply TIA EIA-232 3 x 5 Driver Receiver
General Description
The DS14C239 is a three driver five receiver device which
conforms to the TIA EIA-232-E standard and CCITT V 28
recommendations This device eliminates b12V supply by
employing an internal DC-DC converter to generate the nec-
essary output levels from a single a5V supply and a posi-
tive voltage power supply (a7 5V to a13 2V) Driver slew
rate control and receiver noise filtering have also been inter-
nalized to eliminate the need for external slew rate control
and noise filtering capacitors With the addition of
TRI-STATE receiver outputs device power consumption is
kept to a minimum
The combination of its low power requirement and extended
operating temperature range makes this device an ideal
choice for a wide variety of commercial industrial and bat-
tery powered applications
Features
Y Conforms to TIA EIA-232-E and CCITT V 28
Y Internal DC-DC converter
Y Low power requirement Ia e 10 mA max
ICC e 1 mA max
Y Internal driver slew rate control
Y Receiver Noise Filtering
Y Operates above 120 kbits sec
Y TRI-STATE Receiver Outputs
Y Direct replacement for MAX239
Y Industrial temperature range option DS14C239T
(b40 C to a85 C)
Connection Diagram
Functional Diagram
TL F 11283 – 1
Order Number DS14C239N DS14C239WM
DS14C239TN or DS14C239TWM
See NS Package Number M24B or NA24G
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1996 National Semiconductor Corporation TL F 11283
RRD-B30M66 Printed in U S A
TL F 11283 – 2
1 page  
Parameter Measurement Information (Continued)
FIGURE 5 Receiver Disable Load Circuit
TL F 11283 – 8
FIGURE 6 Receiver TRI-STATE Timing (tPHZ tPZH)
TL F 11283 – 9
FIGURE 7 Receiver TRI-STATE Timing (tPLZ tPZL)
TL F 11283 – 10
Pin Descriptions
VCC (pin 4) Power supply pin for the device a5V
(g10%)
Va (pin 5) Positive supply for TIA EIA-232-E drivers
Specified at 7 5V minimum and 13 2V maximum
Vb (pin 8) Negative supply for TIA EIA-232-E drivers
Recommended external capacitor C2 e 1 0 mF (16V) This
supply is not intended to be loaded externally
C1a C1b (pins 6 7) External capacitor connection pins
Recommended capacitor 1 0 mF (16V)
EN (pin 14) Controls the Receiver output TRI-STATE Cir-
cuit A High level on this pin will disable the Receiver Out-
put
DIN 1 – 3 (pins 24 23 16) Driver input pins are TTL CMOS
compatible Inputs of unused drivers may be left open an
internal pull-up resistor (500 kX minimum typically 5 MX)
pulls input to VCC Output will be LOW for open inputs
DOUT 1 – 3 (pins 19 20 13) Driver output pins conform to
TIA EIA-232-E levels
RIN 1 – 5 (pins 2 21 18 12 9) Receiver input pins accept
TIA EIA-232-E input voltages (g15V) Receivers feature a
noise filter and guaranteed hysteresis of 100 mV Unused
receiver input pins may be left open Internal input resistor
(5 kX) pulls input LOW providing a failsafe HIGH output
ROUT 1 – 5 (pins 1 22 17 11 10) Receiver output pins
are TTL CMOS compatible Receiver output HIGH voltage
is specified for both CMOS and TTL load conditions
GND (pin 3) Ground pin
5 http www national com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet DS14C239.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| DS14C232 | Low Power +5V Powered TIA/EIA-232 Dual |  National |
| DS14C232 | DS14C232 Low Power +5V Powered TIA/EIA-232 Dual Driver/Receiver (Rev. C) |  Texas Instruments |
| DS14C238 | Single Supply TIA/EIA-232 4 x 4 Driver/Receiver | National |
| DS14C238 | DS14C238 Single Supply TIA/EIA-232 4 x 4 Driver/Receiver (Rev. C) | Texas Instruments |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 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, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |