DS55493 Datasheet, PDF (1/4 Pages) National Semiconductor (TI) – Quad LED Segment Driver

April 1990
DS55493 DS75493 Quad LED Segment Driver
General Description
The DS55493 DS75493 is a quad LED segment driver It is
designed to interface between MOS IC’s and LED’s An ex-
ternal resistor is required for each segment to drive the out-
put current which is approximately equal to 0 7V R_L and is
relatively constant independent of supply variations Blank-
ing can be achieved by taking the chip enable (CE) to a
logical ‘‘1’’ level
Features
Y _{Low voltage operation}
Y _{Low input current for MOS compatibility}
Y _{Low standby power}
Y _{Display blanking capability}
Y _{Output current regulation}
Y _{Quad high gain circuits}
Schematic and Connection Diagrams
Dual-In-Line Package
Truth Table
TL F 7561 – 1
CE
V_IN
0
1
0
0
1
X
X e Don’t care
I_OUT
ON
OFF
OFF
TL F 7561 – 2
Order Number DS55493J DS75493J
or DS75493N
See NS Package Number J16A or N16A
C1995 National Semiconductor Corporation TL F 7561
RRD-B30M105 Printed in U S A