HCMS-2975_13 Datasheet, PDF (6/16 Pages) AVAGO TECHNOLOGIES LIMITED – High Performance CMOS 5 x 7 Alphanumeric Displays

Optical Characteristics at 25°C^[1]
V_LED = 5.0 V, 50% Peak Current, 100% Pulse Width
      
     
Luminous Intensity per LED^[2]
     
Character Average (µcd)
Display Color
Part Number
Min.
Typ.
AlGaAs Red
HCMS-29X5
95
230
High Efficiency Red
HCMS-29X2
29
64
Orange
HCMS-29X4
29
64
Yellow
HCMS-29X1
29
64
Green
HCMS-29X3
57
114
Peak
Wavelength
l_Peak (nm)
Typ.
645
635
600
583
568
Dominant
Wavelength
l_d[3] (nm)
Typ.
637
626
602
585
574
Notes:
1.  Refers to the initial case temperature of the device immediately prior to measurement.
2.  Measured with all LEDs illuminated.
3.  Dominant wavelength, l_d, is derived from the CIE chromaticity diagram and represents the single wavelength which defines the perceived
LED color.
Electrical Description
Pin Function
RESET (RST)
DATA IN (D_IN)
DATA OUT (D_OUT)
CLOCK (CLK)
REGISTER SELECT (RS)
CHIP ENABLE (CE)
OSCILLATOR SELECT (SEL)
OSCILLATOR (OSC)
BLANK (BL)
GND_LED
GND_LOGIC
V_LED
V_LOGIC
Description
Sets Control Register bits to logic low. The Dot Register contents are unaffected by
the Reset pin. (logic low = reset; logic high = normal operation).
Serial Data input for Dot or Control Register data. Data is entered on the rising edge
of the Clock input.
Serial Data output for Dot or Control Register data. This pin is used for cascading
multiple displays.
Clock input for writing Dot or Control Register data. When Chip Enable is logic low,
data is entered on the rising Clock edge.
Selects Dot Register (RS = logic low) or Control Register (RS = logic high) as thedes-
tination for serial data entry. The logic level of RS is latched on the falling edge of the
Chip Enable input.
This input must be a logic low to write data to the display. When CE returns to logic
high and CLK is logic low, data is latched to either the LED output drivers or a Control
Register.
Selects either an internal or external display oscillator source. (logic low = External
Display Oscillator; logic high = Internal Display Oscillator).
Output for the Internal Display Oscillator (SEL = logic high) or input for an External
Display Oscillator (SEL = logic low).
Blanks the display when logic high. May be modulated for brightness control.
Ground for LED drivers.
Ground for logic.
Positive supply for LED drivers.
Positive supply for logic.