产品概览
NE555P from TI is the classic timer IC for astable and monostable applications. 4.5-16V, 500kHz max, 200mA output. DIP-8.
工作原理
Precision timer generating accurate time delays or oscillation. Monostable: pulse width = 1.1 x R x C. Astable: frequency = 1.44/((R1+2R2)xC). Open collector discharge transistor. Reset and control voltage pins.
Pin Description
| 针脚 | 名称 | 功能 |
|---|---|---|
| 1 | 接地 | 地面 |
| 2 | TRIG | Trigger |
| 3 | 出局 | 输出 |
| 4 | 重置 | Reset (active low) |
| 5 | CTRL | Control voltage |
| 6 | THRESH | Threshold |
| 7 | DISCH | Discharge |
| 8 | VCC | 4.5-16V supply |
应用
- Timing circuits
- Pulse generation
- Clock oscillators
- PWM controllers
Alternative Models
| Mfr | Part | 说明 |
|---|---|---|
| TI | LMC555CM | CMOS low-power version |