TM1638 Datasheet – LED Driver Controller, SOP28
Package SOP 28 Pin Type
TM1638 overview
TM1638 is LED driver controller with key-scan interface, MCU digital interface, data latch, LED high pressure driver, key-scan is integrated into a single chip. TM1638 main apply for fridge, air condition and home theatre as high-seg display driver
Datasheet
tm1638-datasheet.pdf
TM1638 features
- Power CMOS technology
- Display mode 10seg×8grid
- Key-scan (8×3bit)
- Gray adjust circuit(duty ratio 8 level is adjustable)
- Serial connection (CLK，STB，DIO)
- Oscillation type: RC oscillation (450Hz+5%)
- Build-in power-on reset circui
- SOP28 package
TM1638 pinout
| Name | Description |
|---|---|
| DIO | Input/output serial data during the rising of shift clock, from low. |
| STB | Initialize serial interface during the falling/rising edge, then receive instruction. The first byte as instruction when STB is low, another disposal would be closed during handle the instruction. CLK would be ignored when STB is high. |
| CLK | Output/input serial data at the rising edge |
| K1～K3 | data inputted into the Pin would be latch after display cycle close. |
| SEG1/KS1~ SEG8/KS8 | Segment output, P pipe open-drain output |
| SEG9～SEG10 | Segment output, p pipe open-drain output |
| GRID1～GRID8 | Grid output, N pipe open-drain output |
| VDD | 5V±10% |
| GND | Connect ground system |
TM1638 applications
- Gaming Accessories
- Home Automation Control Panels
- Digital Clocks
- Instrumentation Panels
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