Electrical Characteristics¶
The electrical characteristics of the CI1324X are listed in the following table.
Table E-1 Electrical Characteristics
| Symbol | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VIN5V | Chip power supply input Note1 | 3.6 | 5 | 5.5 | V |
| AVDD | 3.3V power supply | 2.97 | 3.3 | 3.63 | V |
| VDD11 | 1.1V power supply | 0.99 | 1.1 | 1.21 | V |
| VIH | Input high voltage (3.0V ≤ VDD33 ≤ 3.6V) |
0.7*VDD33 | - | VDD33+0.3 | V |
| VIL | Input low voltage (3.0V ≤ VDD33 ≤ 3.6V) |
-0.3 | - | 0.3*VDD33 | V |
| VOL | Output low voltage @IOL = 12mA | - | - | 0.4 | V |
| VOH | Output high voltage @IOH = 20mA | 2.4 | - | - | V |
| I5V-IO | Drive current when 5V tolerant I/O outputs 3.3V | 20 | - | 33 | mA |
| I3V3-IO | Drive current when 3.3V tolerant I/O outputs 3.3V | 14 | - | 24 | mA |
| ΣIVDD | Total current of all I/Os | - | - | 260 | mA |
| Pde | Total power consumption at 5V supply with external 1.1V VDD11 during normal operation (TA = 25°C) | 40 | - | 90 | mW |
| Pdi | Total power consumption at 5V supply with internal LDO during normal operation (TA = 25°C) | 125 | - | 255 | mW |
| RC Oscillator Accuracy Note5 |
TA = -40 to 85°C | -1.5 | - | +1.5 | % |
| Top | Operating ambient temperature | -40 | - | +85 | °C |
| Tst | Storage temperature | -55 | - | +150 | °C |
Note4: Ripple must be less than 300mVp-p.
Note5: Due to semiconductor technology principles and characteristics, the built-in RC oscillator’s frequency accuracy may experience temperature drift (±1.5%) in high/low temperature environments. The CI1324X features built-in baud rate adaptation circuitry to ensure normal communication with the MCU across temperature variations. For applications requiring highly accurate clocking, please use our chips with external crystal oscillators and corresponding application solutions.