555
Timer
PDF datasheet
| | | | |
| GND | 1 • | 8 | Vcc |
| TRIG | 2 | 7 | DIS |
| OUT | 3 | 6 | THR |
| RESET | 4 | 5 | CV |
| | | | |
| Pin | Symbol | Description |
|---|
| 1 | GND | ground |
| 2 | TRIG | trigger |
| 3 | OUT | output |
| 4 | RESET | reset (active low) |
| 5 | CV | control voltage |
| 6 | THR | threshold |
| 7 | DIS | discharge |
| 8 | Vcc | supply voltage |
Specifications
(typical values under recommended operating conditions, unless specified)| Parameter | Value | Unit |
|---|
| Maximum supply voltage | 18 | V |
| Maximum output current (NE555) | 200 | mA |
| Power dissipation | 600 | mW |
Notes
- In monostable mode, pulse width ≈ 1.1RC
- In astable mode, frequency = 1/(0.693*C*(R1+2*R2))
- In astable mode, pulse high time = 0.693*(R1+R2)*C
- In astable mode, pulse low time = 0.693*R2*C
Note: Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information.