TM1637 LED Display and Keypad Driver IC
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The TM1637 is a widely used integrated circuit (IC) designed to drive 7-segment LED displays and optionally read inputs from a small keypad. It's manufactured by Titan Micro Electronics and is especially popular in hobby electronics and Arduino projects.
Key Features of the TM1637:
| Feature | Description |
|---|---|
| Display Driver | Drives 6-digit 7-segment LED displays (common cathode) |
| Keypad Interface | Can scan up to 16 keys (4x4 matrix) |
| Control Interface | 2-wire serial interface (not I2C or SPI, but similar) |
| Voltage Range | Operates from 3.3V to 5.5V |
| Adjustable Brightness | 8 levels of brightness control |
| Built-in Clock Generator | Eliminates the need for an external clock |
| Low Power Consumption | Especially useful in battery-operated systems |
| Package Type | SOP-20 (Surface Mount) |
| Pin | Name | Description |
|---|---|---|
| 1–8 | SEG1–SEG8 | Segment outputs (for each LED) |
| 9–14 | GRID1–GRID6 | Digit control lines (1 to 6 digits) |
| 18 | DIO | Data Input/Output |
| 19 | CLK | Clock signal |
| 20 | VDD | Power Supply |
| 10 | GND | Ground |
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