a
Octal, RS-232/RS-423 Line Driver
ADM5170
FEATURES
Eight Single Ended Line Drivers in One Package
Meets EIA Standard RS-232E, RS-423A and
CCITT V.10/X.26
Resistor Programmable Slew Rate
Wide Supply Voltage Range
Low Power CMOS
3-State Outputs
TTL/CMOS Compatible Inputs
Output Short Circuit Protection
Available in 28-Pin DIP/PLCC
Low Power Replacement for UC5170C
FUNCTIONAL BLOCK DIAGRAM
ADM5170
AI
B
BO
CI
C
CO
DI
D
DO
EI
E
EO
FI
F
FO
GI
G
GO
HI
GENERAL DESCRIPTION
The ADM5170 is an octal line driver suitable for digital communication systems with data rates up to 116 kB/s. Input TTL or
CMOS signal levels are inverted and translated into either EIA
RS-232E or RS-423A signal levels depending on the status of the
Mode Select inputs MS+ and MS–. With both Mode Select inputs
at GND, RS-423 operation is selected while with MS+ connected
to VDD and MS– connected to V SS, RS-232 operation is selected.
AO
BI
APPLICATIONS
High Speed Communication
Computer I-O Ports Peripherals
High Speed Modems
Printers
Logic Level Translation
A
H
HO
EN
MS+
MS–
The output slew rates may be controlled using an external resistor
connected between the SRA (Slew Rate Adjust) pin and GND.
Resistor values between 2 kΩ and 10 kΩ may be selected giving a
slew rate which can be adjusted from 10 V/µs to 2.2 V/µs. This
adjustment of the slew rate allows tailoring of the output characteristics to suit the interface cable being used.
SRA
RS-232/RS-423
MODE SELECT
SLEW RATE
CONTROL
Truth Table
The outputs may be disabled using the EN (Enable Input). This
feature permits sharing of a common output line.
Inputs
EN
Data
Outputs
EIA RS-232E1
RS-423A
The ADM5170 is fabricated on an advanced CMOS process
featuring low power consumption. In the disabled state the power
consumption reduces from 500 mW to 40 mW. The ADM5170 is
available in both 28-pin DIP and 28-lead PLCC packages.
0
0
1
0
1
X
(VDD – 3 V)
(VSS – 3 V)
High Z
5 V to 6 V
–5 V to –6 V
High Z
1
Minimum Output Level
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
