HCMS-2919 Avago Technologies US Inc., HCMS-2919 Datasheet - Page 7

• Manufacturer Part Number: HCMS-2919
• Description: LED DISPLAY 5X7 8CHAR 3.8MM BLUE
• Manufacturer: Avago Technologies US Inc.
• Series: HCMS-29xxr

Specifications of HCMS-2919

• Display Type: Alphanumeric
• Millicandela Rating: *
• Size / Dimension: 1.40" L x 0.40" W x 0.20" H (35.6mm x 10.2mm x 5.1mm)
• Color: Blue
• Configuration: 5 x 7
• Voltage - Forward (vf) Typ: *
• Package / Case: 26-DIP
• Number Of Digits/alpha: 8
• Digit/alpha Size: 0.15" (3.8mm)
• Number Of Digits: 8
• Illumination Color: Blue
• Wavelength: 428 nm
• Operating Voltage: 5.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 170 ucd
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Common Pin: -
• Lead Free Status / Rohs Status: Details

Dot Register
The Dot Register holds the pattern to be displayed by
the LEDs. Data is loaded into the Dot Register according
to the procedure shown in Table 1 and Figure 3.
First RS is brought low, then CE is brought low. Next,
each successive rising CLK edge will shift in the data at
the DIN pin. Loading a logic high will turn the
corresponding LED on; a logic low turns the LED off.
When all 160 bits have been loaded (or 320 bits in an
8-digit display), CE is brought to logic high.
When CLK is next brought to logic low, new data is
latched into the display dot drivers. Loading data into
the Dot Register takes place while the previous data is
displayed and eliminates the need to blank the display
while loading data.
Figure 3. Write Cycle Timing Diagram
7
(SIMULTANEOUS)
D
LED OUTPUTS,
OUT
REGISTERS
(SERIAL)
CONTROL
D
CLK
OUT
D
CE
RS
IN
T
CLKCE
T
3
RSS
1
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
T
CEDO
RSH
10
2
T
CES
4
T
9
T
DOUTP
DS
6
T
T
DOUT
DH
7
8
T
11
CLKH
PREVIOUS DATA
T
CLKL
12
Notes:
1. Bit D
2. Selection of Control Word 1 or Control Word 0 is set by D
3. Control Word data is loaded Most Significant Bit (D
Table 1. Register Truth Table
Function
Select Dot Register
Load Dot Register
DIN = HIGH, LED = "ON"
DIN = LOW, LED = "OFF"
Copy Data from Dot
Register to Dot Latch
Select Control Register
Load Control Register
Latch Data to Control Word
for serial mode or High for simultaneous mode.
Control Shift Register. The unselected control word retains its
previous value.
0
of Control Word 1 must have been preciously set to Low
[1,3]
[2]
T
CEH
CLK
Not
Rising
L
Not
Rising
L
↑
↑
5
NEW DATA LATCHED HERE
L
H
L
H
CE
↓
↓
7
) first.
NEW DATA
[1]
7
RS
H
of the
X
X
X
X