| 参数 | 符号 | 测试条件 | 最小 | 典型 | 最大 | 单位 |
| | | | | CP2102N | Data Sheet |
| VDD Supply Monitor Threshold | V | | 1.95 | 2.05 | 2.15 | V |
| Power-On Reset (POR) Threshold | V | Rising Voltage on VDD | — | 1.2 | — | V |
| | Falling Voltage on VDD | 0.75 | — | 1.36 | V |
| VDD Ramp Time | t | Time to V > 2.2 V | 10 | — | — | μs |
| Reset Delay from POR | t | Relative to V > V | 3 | 10 | 31 | ms |
| Reset Delay from non-POR | source t | Time between release of | reset — | 50 | — | μs |
| RSTb Low Time to Generate | Reset t | | 15 | — | — | μs |
| | Table 3.4. Configuration | Memory | | | |
| V DD Voltage During Programming | 1 V PROG | | 3.0 | — | 3.6 | V |
| Endurance (Write/Erase Cycles) | N | | 20k | 100k | — | Cycles |
| | Table 3.5. Internal | Oscillator | | | |
| Power Supply Sensitivity | PSS | T = 25 °C | — | 0.02 | — | %/V |
| Temperature Sensitivity | TS | V = 3.0 V | — | 45 | — | ppm/°C |
| | | | | CP2102N | Data Sheet |
| | Table 3.6. 5V Voltage | Regulator | | | |
| Input Voltage Range 1 | V REGIN | | 3.0 | — | 5.25 | V |
| Output Voltage on VDD 2 | V REGOUT | Output Current = 1 to 100 | mA 3.1 | 3.3 | 3.6 | V |
| | Regulation range (VREGIN | ≥ 4.1V) | | | |
| | Output Current = 1 to 100 | mA — | V – | — | V |
| | Dropout range (VREGIN < | 4.1V) | | | |
| Output Current 2 | I REGOUT | | — | — | 100 | mA |
| Dropout Voltage | V | Output Current = 100 mA | — | — | 0.8 | V |
| 2.Output current is total | regulator output, | including any current required by | the device. | | | |
| | | | | CP2102N | Data Sheet |
| Output High Voltage (High | Drive) V | I = -7 mA, V ≥ 3.0 V | V - 0.7 | — | — | V |
| OH | OH IO | IO | | | |
| | I = -3.3 mA, 2.2 V ≤ V OH IO | < 3.0 V V x 0.8 IO | — | — | V |
| | I = -1.8 mA, 1.71 V ≤ V | < 2.2 V | | | |
| Output Low Voltage (High | Drive) V | I = 13.5 mA, V ≥ 3.0 V | — | — | 0.6 | V |
| | I = 7 mA, 2.2 V ≤ V < OL IO | 3.0 V — | — | V x 0.2 IO | V |
| | I = 3.6 mA, 1.71 V ≤ V | < 2.2 V | | | |
| Output High Voltage (Low | Drive) V | I = -4.75 mA, V ≥ 3.0 | V V - 0.7 | — | — | V |
| OH | OH IO | IO | | | |
| | I = -2.25 mA, 2.2 V ≤ V | < 3.0 V V x 0.8 | — | — | V |
| | I = -1.2 mA, 1.71 V ≤ V | < 2.2 V | | | |
| Output Low Voltage (Low Drive) | V | I = 6.5 mA, V ≥ 3.0 V | — | — | 0.6 | V |
| | I = 3.5 mA, 2.2 V ≤ V OL IO | < 3.0 V — | — | V x 0.2 IO | V |
| | I = 1.8 mA, 1.71 V ≤ V | < 2.2 V | | | |
| Input High Voltage | V | | V - 0.6 | — | — | V |
| Input Low Voltage | V | | — | — | 0.6 | V |
| Pin Capacitance | C | | — | 7 | — | pF |
| Weak Pull-Up Current | I | V = 3.6 | -30 | -20 | -10 | μA |
| Input Leakage (Pullups off or | Ana- I | GND < V < V | -1.1 | — | 1.1 | μA |
| Input Leakage Current with V | I | V < V < V +2.0 V | 0 | 5 | 150 | μA |
| RS485 Setup Time before Start | t | | 0 | — | 64.02 | ms |
| RS485 Hold Time after Stop | Bit1 t RS485H | | 0 | — | 64.02 | ms |
| TX Toggle Rate | f | | — | 20 | — | Hz |
| RX Toggle Rate | f | | — | 20 | — | Hz |
| | | | | CP2102N | Data Sheet |
| Output High Voltage | V | V ≥ 3.0V | 2.8 | — | — | V |
| Output Low Voltage | V | V ≥ 3.0V | — | — | 0.8 | V |
| Output Crossover Point | V | | 1.3 | — | 2.0 | V |
| Output Impedance | Z | Driving High | 28 | 36 | 44 | Ω |
| | Driving Low | 28 | 36 | 44 | |
| Pull-up Resistance | R | Full Speed (D+ Pull-up) | 1.425 | 1.5 | 1.575 | kΩ |
| Output Rise Time | T | Full Speed | 4 | — | 20 | ns |
| Output Fall Time | T | Full Speed | 4 | — | 20 | ns |
| Differential Input | V | | (D+) - (D-) | | 0.2 | — | — | V |
| Differential Input Common | Mode V | | 0.8 | — | 2.5 | V |
| Input Leakage Current | I | Pullups Disabled | — | <1.0 | — | μA |
| | Table 3.9. Thermal | Conditions | | | |
| Thermal Resistance (Junction | to θ | QFN20 Packages | ─ | 60 | ─ | °C/W |
| | QFN24 Packages | ─ | 30 | ─ | °C/W |
| | QFN28 Packages | ─ | 26 | ─ | °C/W |
| Thermal Resistance (Junction | to θ | QFN20 Packages | ─ | 32.9 | ─ | °C/W |
| | QFN24 Packages | ─ | 24.2 | ─ | °C/W |
| | QFN28 Packages | ─ | 18.8 | ─ | °C/W |
| Thermal Characterization | Parame- Ψ | QFN20 Packages | ─ | 0.88 | ─ | °C/W |
| | QFN24 Packages | ─ | 0.3 | ─ | °C/W |
| | QFN28 Packages | ─ | 0.3 | ─ | °C/W |
| | | | | | CP2102N Data Sheet |