TM1637 2-Wire Serial 7-Segment LED Driver Controller
Dedicated LED drive control circuit with keyboard scan interface and 2-wire serial interface (CLK, DIO). Commonly used to drive 4-digit or 6-digit 7-segment clock displays.
Aliase:TM1637 LED Driver, 4-Digit Display Chip, 7-Segment Controller
DIP-20 / SOP-20 Top View
20 Pins
Pinout Table20
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | GND | Ground | System Ground (0V) |
| 2 | SEG1 | Digital | Segment 1 (A) Output |
| 3 | SEG2 | Digital | Segment 2 (B) Output |
| 4 | SEG3 | Digital | Segment 3 (C) Output |
| 5 | SEG4 | Digital | Segment 4 (D) Output |
| 6 | SEG5 | Digital | Segment 5 (E) Output |
| 7 | SEG6 | Digital | Segment 6 (F) Output |
| 8 | SEG7 | Digital | Segment 7 (G) Output |
| 9 | SEG8 | Digital | Segment 8 (DP / Colon) Output |
| 10 | GRID6 | Digital | Digit Grid 6 Output |
| 11 | GRID5 | Digital | Digit Grid 5 Output |
| 12 | GRID4 | Digital | Digit Grid 4 Output |
| 13 | GRID3 | Digital | Digit Grid 3 Output |
| 14 | GRID2 | Digital | Digit Grid 2 Output |
| 15 | GRID1 | Digital | Digit Grid 1 Output |
| 16 | VDD | Power | Positive Supply Voltage (+5V ±10%) |
| 17 | DIO | Digital | Serial Data Input/Output (Open-Drain, requires pull-up) |
| 18 | CLK | Digital | Serial Clock Input |
| 19 | K1 | Digital | Key Scan Input K1 |
| 20 | K2 | Digital | Key Scan Input K2 |