DS14C535 +5V Supply EIA/TIA-232 3 x 5 Driver/Receiver
May 1998
DS14C535
+5V Supply EIA/TIA-232 3 x 5 Driver/Receiver
General Description
The DS14C535 is three driver, five receiver device which
conforms to EIA/TIA-232-E and CCITT (ITU-T) V.28 stan-
dard specifications. This device employs an internal DC-DC
converter to generate the necessary output levels from a
+5V power supply. A SHUTDOWN (SD) mode reduces the
supply current to 10 µA maximum. In the SD mode, one re-
ceiver is active, allowing ring indicator (RI) to be monitored.
PC Board space consumption is minimized by the availability
of Shrink Small Outline Packaging (SSOP).
The DS14C535 provides a one-chip solution for the common
9-pin serial RS-232 interface between data terminal and
data circuit-terminating equipment.
This device allows an easy migration path to the 3.3V
DS14C335. The packages are the same. The N/C pins on
the DS14C535 are not physically connected to the chip.
Board layout for the DS14C335 will accommodate both de-
vices.
This device’s low power requirement and small footprint
makes it an ideal choice for Laptop and Notebook applica-
tions.
Features
n
Pin compatible with DS14C335
n
Conforms to EIA/TIA-232-E and CCITT (ITU-T) V.28
specifications
n
Failsafe receiver outputs high when inputs open
n
Operates with single +5V power supply
n
Low power requirement — I
CC
12 mA maximum
n
SHUTDOWN mode — I
CX
10 µA maximum
n
One Receiver (R5) active during SHUTDOWN
n
Operates up to 128 kbps — Lap-Link
®
Compatible
n
4V/µs minimum Slew Rate guaranteed
n
ESD rating of 3 kV on all pins (H, B, M)
n
Available in 28-lead SSOP EIAJ Type II package
n
Only four 0.1 µF capacitors required for the DC-DC
converter
Connection Diagram
DS14C535
Functional Diagram
DS011910-1
Order Number DS14C535MSA
See NS Package Number MSA28
DS011910-2
Lap-Link
®
is a registered trademark of Traveling Software Inc.
© 1999 National Semiconductor Corporation
DS011910
www.national.com
NSC [ NATIONAL SEMICONDUCTOR ]
