SCF5740 OSRAM Opto Semiconductors Inc, SCF5740 Datasheet - Page 7

• Manufacturer Part Number: SCF5740
• Description: DISPLAY 4CHAR .270" 5X7 RED
• Manufacturer: OSRAM Opto Semiconductors Inc
• Series: Intelligent Display®r

Specifications of SCF5740

• Millicandela Rating: 55µcd
• Size / Dimension: 1.30" L x 0.79" W x 0.28" H (33.02mm x 20.07mm x 7mm)
• Color: Red
• Configuration: 5 x 7
• Number Of Digits: 4
• Character Size: 0.27 in
• Illumination Color: Red
• Wavelength: 650 nm
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 55 ucd
• Viewing Area (w X H): 4.45 mm x 6.86 mm
• Display Type: 5 x 7 Dot Matrix
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Forward (vf) Typ: -
• Internal Connection: -
• Lead Free Status / Rohs Status: Details
• Other names: Q68000A8848

Display Column and Row Format
Row 6
1= Display dot „ON“
0=Display dot „OFF“
Column Data Ranges
Row 0
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Operation of the SCF574X
SCF574X Block Diagram
2006-01-23
RST
CLK I/O
CLKSEL
DATA
SDCLK
LOAD
V1
V2
C0
0
C1
0
OSC
C2
1
00H to 1FH
00H to LFH
00H to LFH
00H to LFH
00H to LFH
00H to LFH
00H to LFH
Counter
C3
0
64
3-bit Address Register
Control Word Logic
X Address Decode
VDIM Controls
Word Register
6-bit Control
User RAM
7 x 20 bits
Memory
C4
0
Counter
7
7
MUX
Rate
The SCF574X display consists of CMOS IC containing control logic
and drivers for four 5 x 7 characters. These components are assem-
bled in a compact plastic package.
Individual LED dot addressablity allows the user great freedom in
creating special characters or mini-icons.
The serial data interface provides a highly efficient interconnection
between the display and the mother board. The SCF574X requires
only 3 lines as compared to 14 for an equivalent four character par-
allel input part.
The on-board CMOS IC is the electronic heart of the display. The
IC accepts decoded serial data, which is stored in the internal RAM.
Asynchronously the RAM is read by the character multiplexer at a
strobe rate that results in a flicker free display. Figure „SCF574X
Block Diagram“ (page 7) shows the three functional areas of the IC.
These include: the input serial data register and control logic, a
140 bits two port RAM, and an internal multiplexer/display driver.
Column
Drivers
0 to 4
Digit
Row Control Logic
SCF5740, SCF5742, SCF5744
Columns 0 to 20
and Row Drivers
0
Display
1
Rows
0 to 6
2
IDBD5073
3