HCMS-3903 Avago Technologies US Inc., HCMS-3903 Datasheet - Page 9

• Manufacturer Part Number: HCMS-3903
• Description: LED DISPLAY 5X7 4CHAR 3.8MM GRN
• Manufacturer: Avago Technologies US Inc.
• Series: HCMS-39xxr

Specifications of HCMS-3903

• Display Type: Alphanumeric
• Millicandela Rating: *
• Internal Connection: *
• Size / Dimension: *
• Color: Green
• Configuration: *
• Voltage - Forward (vf) Typ: *
• Package / Case: 12-DIP
• Number Of Digits/alpha: 4
• Digit/alpha Size: 0.15" (3.8mm)
• Number Of Digits: 4
• Character Size: 2.11 mm x 3.71 mm
• Illumination Color: Green
• Wavelength: 574 nm
• Operating Voltage: 3.3 V
• Operating Current: 5 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 252 ucd
• Power Consumption: 0.766 W
• Viewing Area (w X H): 15.46 mm x 3.71 mm
• Common Pin: None
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

SIMULTANEOUS)
Figure 5. HCMS-39XX write cycle timing diagram
Pixel Map
In a 4-character display, the 160-bits are arranged as 20
columns by 8 rows. This array can be conceptualized as
four 5 x 8 dot matrix character locations, but only 7 of
the 8 rows have LEDs (see Figures 6 & 7). The bottom
row (row 0) is not used. Thus, latch location 0 is never
displayed. Column 0 controls the left-most column.
Data from Dot Latch locations 0-7 determine whether
or not pixels in Column 0 are turned-on or turned-off.
Therefore, the lower left pixel is turned-on when a logic
high is stored in Dot Latch location 1. Characters are
loaded in serially, with the left-most character being
loaded first and the right-most character being loaded
last. By loading one character at a time and latching
the data before loading the next character, the figures
will appear to scroll from right to left.
9
D
LED OUTPUTS,
OUT
REGISTERS
CONTROL
(SERIAL)
D
CLK
OUT
D
RS
CE
IN
NOTE:
1. DATA IS COPIED TO THE CONTROL REGISTER OR THE DOT LATCH AND LED OUTPUTS WHEN CE IS HIGH AND CLK IS LOW.
T
CLKCE
T
3
RSS
1
T
T
CEDO
RSH
10
2
T
CES
4
T
9
DOUTP
T
DS
6
T
T
DOUT
DH
7
8
T
CLKH
11
PREVIOUS DATA
T
CLKL
12
T
CEH
5
NEW DATA LATCHED HERE
NEW DATA
[1]