2–200

FEATURES

in Red, High Efficiency Red, High Efficiency Green

to package ratio)

Ideal for User Defined Characters

– 140 Bit RAM for User Defined Characters

– Eight Dimming Levels

– Power Down Model (<250

µW)

– Hardware/Software Clear Functions

– Internal or External Clock

DESCRIPTION

The SCF574X is a four digit, dot addressable 5x7 dot matrix,

serial input, alphanumeric Intelligent Display. The four digits are

packaged in a rugged, high quality, optically transparent, plastic

22 pin DIP with 0.1” pin spacing.

The on-board CMOS has a 140 bit RAM, one bit associated with

one LED, each to generate User Defined Characters. In Power

Down Mode, quiescent current is <50

µA.

The SCF574X is designed for work with the serial port of most

common microprocessors. Data is transferred into the display

through the Serial Data Input (DATA), clocked by the Serial Data

Clock (SDCLK), and enabled by the Load Input (LOAD).

The Clock I/O (CLK I/O) and Clock Select (CLK SEL) pins offer

the user the capability to supply a high speed external multiplex

clock. This feature can minimize audio in-band interference for

portable communication equipment or eliminate the visual

sychronization effects found in high vibration environments such

as avionic equipment.

Package Dimensions in Inches (mm)

SCF574X

SIEMENS

YYWW

Z

.270

(6.86)

.157 –.007

(3.99 –.18)

.325

(8.26)

.175

(4.45)

.790 –.010

(20.07 –.25)

1.300 max.

(33.02)

.145 –.015

(3.68 –.38)

.100 –.015

(2.54 –.38)

.276 max.

(7.0) max.

.160 –.020

(4.06) –.51)

.018 X .012

(.46 X .30)

(Leads 22 plcs.)

.600 –.020

(15.25 –.51)

Pin 1

Indicator

Luminous Intensity Code

EIA Date Code

STANDARD RED

SCF5740

HIGH EFFICIENCY RED

SCF5742

HIGH EFFICIENCY GREEN

SCF5744

0.270” 4-Character, 5x7 Dot Matrix

Serial Input Dot Addressable Intelligent Display

™