MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MC145403/D
MC145403
Drivers/Receivers
MC145404
MC145405
MC145408
EIA–232–E and CCITT V.28
These devices are silicon gate CMOS ICs that combine both the transmitter
and receiver to fulfill the electrical specifications of EIA Standard 232–E and
CCITT V.28. The drivers feature true TTL input compatibility, slew rate limiting
outputs, 300
Ω
power–off source impedance, and output typically switching to
within 25% of the supply rails. The receivers can handle up to
±
25 V while
presenting 3 to 7 kΩ impedance. Hysteresis in the receivers aid in the reception
of noisy signals. By combining both drivers and receivers in a single CMOS
chip, these devices provide efficient, low–power solutions for both EIA–232–E
and V.28 applications.
These devices offer the following performance features:
Drivers
•
•
•
•
•
•
•
•
•
±
5 to
±
12 V Supply Range
300
Ω
Power–Off Source Impedance
Output Current Limiting
TTL and CMOS Compatible Inputs
Driver Slew Rate Range Limited to 30 V/µs Maximum
±
25 V Input Range
3 to 7 kΩ Input Impedance
0.8 V of Hysteresis for Enhanced Noise Immunity
TTL and CMOS Compatible Outputs
24
24
1
20
1
P SUFFIX
PLASTIC DIP
CASE 738
P SUFFIX
PLASTIC DIP
CASE 724
Receivers
20
1
DW SUFFIX
SOG PACKAGE
CASE 751D
Available Driver/Receiver Combinations
Device
MC145403
MC145404
MC145405
MC145408
Drivers
3
4
5
5
Receivers
5
4
3
5
Figure
1
2
3
4
No. of Pins
20
20
20
24
DW SUFFIX
SOG PACKAGE
CASE 751E
1
20
1
SD SUFFIX
SSOP
CASE 940B
Alternative EIA–232 devices to consider are:
Three Supply
MC145406 (3 x 3)
Single Supply
MC145407 (3 x 3)
MC145705 (2 x 3) with Power Down
MC145706 (3 x 2) with Power Down
MC145707 (3 x 3) with Power Down
ORDERING INFORMATION
MC145403P
MC145404P
MC145405P
MC145408P
MC145403DW
MC145404DW
MC145405DW
MC145408DW
MC145405SD
Plastic DIP
Plastic DIP
Plastic DIP
Plastic DIP
SOG Package
SOG Package
SOG Package
SOG Package
SSOP
REV 2
1/97
TN97010600
©
Motorola, Inc. 1997
MOTOROLA
MC145403•MC145404•MC145405•MC145408
1
MOTOROLA [ MOTOROLA, INC ]
