a
Octal, RS-232/RS-423 Line Driver
ADM5170
FEATURES
FUNCTIO NAL BLO CK D IAGRAM
Eight Single Ended Line Drivers in One Package
Meets EIA Standard RS-232E, RS-423A and
CCITT V.10/ X.26
ADM5170
Resistor Program m able Slew Rate
Wide Supply Voltage Range
Low Pow er CMOS
A
A
B
C
A
B
C
D
E
O
I
I
I
3-State Outputs
B
O
TTL/ CMOS Com patible Inputs
Output Short Circuit Protection
Available in 28-Pin DIP/ PLCC
Low Pow er Replacem ent for UC5170C
C
D
O
APPLICATIONS
High Speed Com m unication
Com puter I-O Ports Peripherals
High Speed Modem s
Printers
D
I
I
O
E
E
O
Logic Level Translation
F
F
F
O
I
G
G
G
O
I
GENERAL D ESCRIP TIO N
T he ADM5170 is an octal line driver suitable for digital communi-
cation systems with data rates up to 116 kB/s. Input T T L 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 VSS, RS-232 operation is selected.
H
H
H
O
I
EN
MS+
RS-232/RS-423
MODE SELECT
MS–
SRA
SLEW RATE
CONTROL
T he 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. T his
adjustment of the slew rate allows tailoring of the output character-
istics to suit the interface cable being used.
Truth Table
Inputs
EN
O utputs
EIA RS-232E1
T he outputs may be disabled using the EN (Enable Input). T his
feature permits sharing of a common output line.
D ata
RS-423A
T he 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. T he 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
1Minimum Output Level
REV. 0
Inform ation furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
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Tel: 617/ 329-4700 Fax: 617/ 326-8703