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DS14C535 Schematic ( PDF Datasheet ) - National

Teilenummer DS14C535
Beschreibung +5V Supply EIA/TIA-232 3 x 5 Driver/Receiver
Hersteller National
Logo National Logo 




Gesamt 8 Seiten
DS14C535 Datasheet, Funktion
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 — ICC 12 mA maximum
n SHUTDOWN mode — ICX 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
Lap-Link® is a registered trademark of Traveling Software Inc.
© 1999 National Semiconductor Corporation DS011910
DS011910-2
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DS14C535 Datasheet, Funktion
Application Information (Continued)
FIGURE 9. Typical DTE Application
DS011910-11
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