SCDQ5544Q OSRAM Opto Semiconductors Inc, SCDQ5544Q Datasheet - Page 8

• Manufacturer Part Number: SCDQ5544Q
• Description: LED Displays 5x5 Hi-Eff Green 0.126 4-CHARACTER
• Manufacturer: OSRAM Opto Semiconductors Inc
• Series: Intelligent Display®r

Specifications of SCDQ5544Q

• Display Type: Dot Matrix
• Emitting Color: Hi-Eff. Green
• Number Of Digits: 4
• Digit Size (in): .134in
• Viewing Area Height (mm): 3.4mm
• Viewing Area Length (mm): 3.4mm
• Package Type: Panel
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Industrial
• Operating Temp Range: -40C to 85C
• Mounting: Through Hole
• Pin Count: 5
• Total Thickness (mm): 5.08mm
• Opto Display Type: Panel
• Pattern Type: Dot Matrix
• Millicandela Rating: 6.4mcd
• Size / Dimension: 0.78" L x 0.40" W x 0.20" H (19.91mm x 10.16mm x 5.08mm)
• Color: Green
• Configuration: 5 x 5
• Character Size: 0.134 in
• Illumination Color: High Efficiency Green
• Wavelength: 568 nm
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 6.4 mcd
• Viewing Area (w X H): 3.4 mm x 3.4 mm
• Lead Free Status / RoHS Status: Compliant
• Voltage - Forward (vf) Typ: -
• Internal Connection: -
• Lead Free Status / Rohs Status: Details
• Other names: Q68100A1474Q

SCDQ Block Diagram
The following explains how to format the serial data to be loaded into the display. The user supplies a string of bit mapped decoded char-
acters. The contents of this string is shown in Figure „Loading Serial Character Data A“ (page 8). Figure „Loading Serial Character
Data B“ (page 8) shows that each character consists of six 8 bit words. The first word encodes the display character location and the suc-
ceeding five bytes are row data. The row data represents the status (On, Off) of individual column LEDs. Figure „Loading Serial Character
Data C“ (page 8) shows that each 8 bit word is formatted to include a three bit Operational Code (OPCODE) defined by bits D7–D5 and
five bits (D4–D0) representing Column Data, Character Address, or Control Word Data.
Figure „Loading Serial Character Data D“ (page 8) shows the sequence for loading the bytes of data. Bringing the LOAD line low enables
the serial register to accept data. The shift action occurs on the low to high transition of the serial data clock (SDCLK). The least significant
bit (D0) is loaded first. After eight clock pulses the LOAD line is brought high. With this transition the OPCODE is decoded. The decoded
OPCODE directs D4–D0 to be latched in the Character Address register, stored in the RAM as Column data, or latched in the Control
Word register. The control IC requires a minimum 600 ns delay between successive byte loads.
Loading Serial Character Data
2006-05-12
SCDQ5541P/Q/R, SCDQ5542P/Q/R, SCDQ5543P/Q/R, SCDQ5544P/Q/R
SDCLK
SDATA
LOAD
A
B
C
D
LOAD
SDCLK
DATA
D0
0
Character 0
Character
Character
Address 0
D1
0
B
D2
&
0
Address
D0
C
D3
0
Column Data
Character 1
D4
Row 0
0
D1
D
D5
5
3
1
Opcode
D2
D6
0
Column Data
Character 2
D7
D3
1
Row 1
Counter Chain
600 ns
TBL
min.
Oscillator
D4
& Timing
8
D0
C4
D5
Column Data
Character 3
Row 2
Column Data
C3
D1
3
D6
D2
C2
D7
D3
C1
Row Decoder
Column Data
Power Down
Lamp Test
Brightness
& Driver
D4
C0
Row 3
Display Multiplexer
Dual Port Ram
D5
0
Opcode
20 x 5 bit
TBL
D6
0
5
Column Data
D7
0
Row 4
Column Logic
Characters
600 ns
IDTC5043
4 - 5 x 5
& Driver
TBL
min.
DD
IDBD5061
20
20