|
|
PDF MC145407 Data sheet ( Hoja de datos )
| Número de pieza | MC145407 | |
| Descripción | 5 Volt Only Driver / Recevier | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MC145407 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Advance Information
5 Volt Only Driver/Receiver
EIA–232–E and CCITT V.28
The MC145407 is a silicon–gate CMOS IC that combines three drivers and
three receivers to fulfill the electrical specifications of EIA–232–E and CCITT
V.28 while operating from a single + 5 V power supply. A voltage doubler and
inverter convert the + 5 V to ± 10 V. This is accomplished through an on–board
20 kHz oscillator and four inexpensive external electrolytic capacitors. The
three drivers and three receivers of the MC145407 are virtually identical to
those of the MC145406. Therefore, for applications requiring more than three
drivers and/or three receivers, an MC145406 can be powered from an
MC145407, since the MC145407 charge pumps have been designed to
guarantee ± 5 V at the output of up to six drivers. Thus, the MC145407 provides
a high–performance, low–power, stand–alone solution or, with the MC145406,
a + 5 V only, high–performance two–chip solution.
Drivers
• ± 7.5 V Output Swing
• 300 Ω Power–Off Impedance
• Output Current Limiting
• TTL and CMOS Compatible Inputs
• Slew Rate Range Limited from 4 V/µs to 30 V/µs
Receivers
• + 25 V Input Range
• 3 to 7 kΩ Input Impedance
• 0.8 V Hysteresis for Enhanced Noise Immunity
Charge Pumps
• + 5 V to ± 10 V Dual Charge Pump Architecture
• Supply Outputs Capable of Driving Three On–Chip Drivers and Three
Drivers on the MC145406 Simultaneously
• Requires Four Inexpensive Electrolytic Capacitors
• On–Chip 20 kHz Oscillator
Order this document
by MC145407/D
MC145407
20
1
P SUFFIX
PLASTIC DIP
CASE 738
20
1
DW SUFFIX
SOG PACKAGE
CASE 751D
ORDERING INFORMATION
MC145407P
Plastic DIP
MC145407DW SOG Package
PIN ASSIGNMENT
C2+ 1
20 C1+
2
GND
3
C2–
4
VSS
Rx1 5 R
19
VCC
18
C1–
17
VDD
16
DO1
6
Tx1
D 15 DI1
Rx2 7 R
14
DO2
Tx2 8
D 13 DI2
Rx3 9 R
12 DO3
10
Tx3
D 11 DI3
D = DRIVER
R = RECEIVER
This document contains information on a new product. Specifications and information herein are subject to change without notice.
REV 1
10/95
©MOMoTtoOroRla,OInLc.A1995
MC145407
1
1 page  
17 19
VDD VCC
15 6
DI1 Tx1
13 DI2
Tx2 8
Vin = ± 2 V
11 DI3
Tx3 10
VSS GND
42
Rout
=
Vin
I
Figure 1. Power–Off Source Resistance
DRIVERS
DI1 – DI3
50%
Tx1 – Tx3
90%
tPHL
tf
10%
tPLH
3V
0V
tr
VOH
VOL
RECEIVERS
Rx1 – Rx3
50%
90%
DO1 – DO3
tPHL
50%
10%
tf
+3V
0V
tPLH
VOH
VOL
tr
Figure 2. Switching Characteristics
DRIVERS
Tx1 – Tx3
3V
–3V
tSLH
3V
–3V
tSHL
SLEW RATE (SR) = – 3 V – (3 V) OR 3 V – ( – 3 V)
tSLH tSHL
Figure 3. Slew Rate Characterization
MOTOROLA
PIN DESCRIPTIONS
VCC
Digital Power Supply (Pin 19)
The digital supply pin, which is connected to the logic pow-
er supply. This pin should have a 0.33 µF capacitor to
ground.
GND
Ground (Pin 2)
Ground return pin is typically connected to the signal
ground pin of the EIA–232–E connector (Pin 7) as well as to
the logic power supply ground.
VDD
Positive Power Supply (Pin 17)
This is the positive output of the on–chip voltage doubler
and the positive power supply input of the driver/receiver
sections of the device. This pin requires an external storage
capacitor to filter the 50% duty cycle voltage generated by
the charge pump.
VSS
Negative Power Supply (Pin 4)
This is the negative output of the on–chip voltage doubler/
inverter and the negative power supply input of the driver/re-
ceiver sections of the device. This pin requires an external
storage capacitor to filter the 50% duty cycle voltage gener-
ated by the charge pump.
C2+, C2–, C1–, C1+
Voltage Doubler and Inverter (Pins 1, 3, 18, 20)
These are the connections to the internal voltage doubler
and inverter, which generate the VDD and VSS voltages.
Rx1, Rx2, Rx3
Receive Data Input (Pins 5, 7, 9)
These are the EIA–232–E receive signal inputs. A voltage
between + 3 and + 25 V is decoded as a space and causes
the corresponding DO pin to swing to ground (0 V). A voltage
between – 3 and – 25 V is decoded as a mark, and causes
the DO pin to swing up to VCC.
DO1, DO2, DO3
Data Output (Pins 16, 14, 12)
These are the receiver digital output pins, which swing
from VCC to GND. Each output pin is capable of driving one
LSTTL input load.
DI1, DI2, DI3
Data Input (Pins 15, 13, 11)
These are the high impedance digital input pins to the driv-
ers. Input voltage levels on these pins must be between VCC
and GND.
Tx1, Tx2, Tx3
Transmit Data Output (Pins 6, 8, 10)
These are the EIA–232–E transmit signal output pins,
which swing toward VDD and VSS. A logic 1 at a DI input
causes the corresponding Tx output to swing toward VSS. A
logic 0 causes the output to swing toward VDD. The actual
levels and slew rate achieved will depend on the output load-
ing (RL ø CL).
MC145407
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC145407.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MC145402 | Serial 13-Bit Linear Codec | Motorola Semiconductors |
| MC145403 | (MC145403 - MC145408) DRIVER / RECEIVERS | Motorola Semiconductors |
| MC145404 | (MC145403 - MC145408) DRIVER / RECEIVERS | Motorola Semiconductors |
| MC145405 | (MC145403 - MC145408) DRIVER / RECEIVERS | Motorola Semiconductors |
| 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 |