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38mm (1.5 inch) Red Single Digit Common Cathode Seven Segment Numeric Display
Description:
The 7-segment display consists of seven LEDs (hence its name) arranged in a rectangular fashion. Each of the seven LEDs is called a segment because when illuminated the segment forms part of a numerical digit (both Decimal and Hex) to be displayed.
In the common cathode display, all the cathode connections of the LED segments are joined together to logic “0” or ground. The individual segments are illuminated by application of a “HIGH”, or logic “1” signal via a current limiting resistor to forward bias the individual Anode terminals (a-g).
A common cathode seven segment is different from a common anode segment in that the cathodes of all the LEDs are connected together. For the use of this seven segment the common cathode connection must be grounded and power must be applied to appropriate segment in order to illuminate that segment.
Application:
Seven-segment displays are widely used in digital clocks, electronic meters, basic calculators, and other electronic devices that display numerical information
Features:
• 1.5 inch digit height
• Low current operation
• Excellent character appearance
• High light output
• Easy mounting on P.C. boards or sockets
• Mechanically rugged
• Standard: gray face, white segment
• RoHS compliant
Electrical / Optical characteristics at TA=25℃
| Parameter | Symbol | Emitting color | Value | Unit | |
| Typ. | Max. | ||||
| Wavelength at peak emission IF=10mA | λpeak | Hyper Red | 645 | - | nm |
| Dominant wavelength IF=10mA | λdom | Hyper Red | 630 | - | nm |
| Spectral bandwidth at 50% Φ REL MAX IF=10mA | Δλ | Hyper Red | 28 | - | nm |
| Capacitance | C | Hyper Red | 35 | - | pF |
| Forward voltage IF=10mA (Segment) | VF | Hyper Red | 3.7 | 4.7 | V |
| Forward voltage IF=10mA (DP) | VF | Hyper Red | 1.85 | 2.35 | V |
| Reverse current (VR=5V) | IR | Hyper Red | - | 10 | μA |
Absolute maximum ratings at TA=25℃
| Parameter | Symbol | Value | Unit |
| Power dissipation | PD | 75 | mW |
| Reverse voltage | VR | 5 | V |
| Junction temperature | Tj | 115 | ℃ |
| Operating temperature | Top | -40 to +85 | ℃ |
| Storage temperature | Tstg | -40 to +85 | ℃ |
| DC forward current (Segment) | IF | 30 | mA |
| DC forward current (DP) | IF | 30 | mA |
| Peak forward current (Segment) | IFM | 185 | mA |
| Peak forward current (DP) | IFM | 185 | mA |
| Electrostatic discharge threshold(HBM) | - | 3000 | V |
| Lead solder temperature | 260℃ for 3-5 seconds | ||
Dimension: (mm)