HCMS-2919 Avago Technologies US Inc., HCMS-2919 Datasheet - Page 6

• 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

Notes:
1. Timing specifications increase 0.3ns per pf of capacitive loading above 15pF.
2. This parameter is valid for Simultaneous Mode data entry of the Control Register.
Display Overview
The HCMS-29xx blue LED displays are driven by on-
board CMOS ICs. The LEDs are configured as 5x7 font
characters and are driven in groups of 4 characters per
IC. Each IC consists of a 160-bit shift register (the Dot
Register), two 7-bit Control Words, and refresh circuitry.
The Dot Register contents are mapped on a one-to-
one basis to the display. Thus, an individual Dot
Register bit uniquely controls a single LED.
8-character displays have two ICs that are cascaded.
The Data Out line of the first IC is internally connected
to the Data In line of the second IC forming a 320-bit
Dot Register. The display’s other control and power
lines are connected directly to both ICs.
AC Timing Characteristics Over Temperature Range (-40 to +85°C)
6
Diagram
Ref. Number Description
1
2
3
4
5
6
7
8
9
10
11
12
Timing
Register Select Setup Time to Chip Enable
Register Select Hold Time to Chip Enable
Rising Clock Edge to Falling Chip Enable Edge
Data Setup Time to Rising Clock Edge
Data Hold Time after Rising Clock Edge
Rising Clock Edge to DOUT
Propagation Delay DIN to DOUT
Reset Low Time
Internal Display Oscillator Frequency
Internal Refresh Frequency
External Display Oscillator Frequency
Prescaler = 1
Prescaler = 8
Chip Enable Setup Time to Rising Clock Edge
Chip Enable Hold Time to Rising Clock Edge
Simultaneous Mode for one IC
CE Falling Edge to DOUT Valid
Clock High Time
Clock Low Time
Clock Frequency
[1]
[1,2]
Reset
Reset initializes the Control Register (sets all Control
Register bits to logic low) and places the display in the
sleep mode. The Reset pin shoud be connected to the
system power on reset circuit. The Dot Registers are
not cleared upon power-on or by Reset. After power-
on, the Dot Register contents are random; however,
Reset will put the display in sleep mode, thereby
blanking the LEDs. The Control Register and the Control
Words are cleared to all zeros by Reset.
To operate the display after being Reset, load the Dot
Register with logic lows. Then load Control Word 0
with the desired brightness level and set the sleep
mode bit to logic high.
F
F
F
F
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
rss
rsh
clkce
ces
ceh
ds
dh
dout
doutp
cedo
clkh
clkl
rstl
cyc
inosc
rf
exosc
Min
10
10
10
10
10
150
4.5V<V
20
35
20
80
80
50
80
51.2
410
LOGIC
18
1000
Max
40
25
5
210
410
8000
<5.5V
Min
10
10
20
55
20
10
10
10
100
100
50
80
150
51.2
V
410
LOGIC
= 3V
Max
65
210
1000
8000
30
45
4
410
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
kHz
Hz
kHz
kHz