MC145705 Datasheet, PDF (1/12 Pages) Motorola, Inc – 5 VOLT ONLY DRIVER/RECEIVER WITH AN INTERGRATED STANDBY MODE

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Product Preview
5 Volt Only
Driver/Receiver with an
Integrated Standby Mode
EIA–232–E and CCITT V.28
The MC145705/06/07 are a series of silicon–gate CMOS transceiver ICs that
fulfill the electrical specifications of EIA–232–E and CCITT V.28 while operating
from a single + 5 V power supply. These transceiver series are high
performance and low power consumption devices that are equipped with
standby and output enable function.
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 MC145705 is composed of two drivers and three receivers, the
MC145706 has three drivers and two receivers, and the MC145707 has three
drivers and three receivers. These drivers and receivers are virtually identical to
those of the MC145407.
Available Driver/Receiver Combinations
Device
Drivers Receivers No. of Pins
MC145705
2
3
20
MC145706
3
2
20
MC145707
3
3
24
Drivers:
• ± 7.5 Output Swing
• 300 Ω Power–Off Impedance
• Output Current Limiting
• TTL and CMOS Compatible Inputs
• Three–State Outputs During Standby Mode
• Hold Output OFF (MARK) State by TxEN Pin
Receivers:
• ± 25 V Input Range
• 3 to 7 kΩ Input Impedance
• 0.8 V Hysteresis for Enhanced Noise Immunity
• Three–State Outputs During Standby Mode
Charge Pumps:
• + 5 to ± 10 V Dual Charge Pump Architecture
• Supply Outputs Capable of Driving Three Drivers on the MC145403/06
Simultaneously
• Requires Four Inexpensive Electrolytic Capacitors
• On–Chip 20 kHz Oscillators
Order this document
by MC145705/D
MC145705
MC145706
MC145707
20
1
20
1
P SUFFIX
PLASTIC DIP
CASE 738
DW SUFFIX
SOG PACKAGE
CASE 751D
24
1
P SUFFIX
PLASTIC DIP
CASE 724
24
1
DW SUFFIX
SOG PACKAGE
CASE 751E
ORDERING INFORMATION
MC145705P
MC145706P
MC145707P
Plastic DIP
Plastic DIP
Plastic DIP
MC145705DW
MC145706DW
MC145707DW
SOG Package
SOG Package
SOG Package
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
REV 1
8/95
©_MOMo_Tto_Oro_Rla,_OIn_Lc._A1995
MC145705•MC145706•MC145707
1