产品概览
SN74LVC1G123DCTR from TI is a single retriggerable monostable multivibrator with direct reset. 1.65-5.5V, output pulse width set by external Rext/Cext. SSOP-8.
工作原理
Monostable multivibrator generates a precise output pulse of defined width when triggered. Pulse width = 0.45 x Rext x Cext. Retriggerable: new trigger during output pulse extends the pulse. Direct reset (CLR) terminates output pulse immediately. Edge-triggered from A (falling) or B (rising) inputs.
Pin Description
| 针脚 | 名称 | 功能 |
|---|---|---|
| 1 | A | Negative-edge trigger |
| 2 | B | Positive-edge trigger |
| 3 | CLR | Direct clear (active low) |
| 4 | Q | Normal output |
| 5 | 接地 | 地面 |
| 6 | nQ | Complement output |
| 7 | Cext | External capacitor |
| 8 | Rext/Cext | External R/C junction |
应用
- Pulse generation
- Debounce circuits
- Timing delay
- One-shot triggers
Alternative Models
| Mfr | Part | 说明 |
|---|---|---|
| TI | SN74LVC2G123DCUR | Dual version |
| Nexperia | 74LVC1G123GW | TSSOP-8 equivalent |