Datasheet CH9121 (Nanjing Qinheng Microelectronics) - 10
| Fabricante | Nanjing Qinheng Microelectronics |
| Descripción | Network serial port transparent transmission chip |
| Páginas / Página | 15 / 10 — 7. Parameters. 7.1 Absolute Maximum Value. 7.2 Electrical Parameters |
| Revisión | V2.5 |
| Formato / tamaño de archivo | PDF / 283 Kb |
| Idioma del documento | Inglés |
7. Parameters. 7.1 Absolute Maximum Value. 7.2 Electrical Parameters
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CH9121 Datasheet https://wch-ic.com
7. Parameters 7.1 Absolute Maximum Value
(Critical or exceeding the absolute maximum value will probably cause the chip to work improperly or even be damaged) Table 7-1 Absolute maximum Symbol Parameter Min. Max. Unit TA Ambient temperature during operation -40 85 ℃ TJ Junction temperature range -40 100 ℃ TS Ambient temperature during storage -55 150 ℃ VCC33 Operating power supply voltage -0.4 4.0 V VCCIO I/O power supply voltage -0.4 4.0 V VDDK Power supply decoupling terminal for core analog circuits -0.4 1.5 V VETH Voltage on ETH physical signal pin -0.4 VCC33+0.4 V VIN Input voltage on pin -0.4 VCCIO+0.4 V VESD(HBM) ESD voltage (HBM) for common I/O pins 6K V Sinking current on I/O pin 20 IIO mA Output current on I/O pin 20
7.2 Electrical Parameters
Table 7-2 Electrical Parameters (VCC33 = 3.3V, VCCIO = 3.3V, TA = 25℃) Symbol Parameter Min. Typ. Max. Unit VCC33 Operating power supply voltage 3.2 3.3 3.4 V VCCIO I/O power supply voltage 1.7 3.3 3.6 V V V CCIO = 3.3V 0 0.8 IL I/O pin, input low voltage V VCCIO = 1.8V 0 0.6 V V CCIO = 3.3V 2.0 VCCIO IH I/O pin, input high voltage V VCCIO = 1.8V 1.2 VCCIO VOL Low output voltage, single pin sinks 5mA 0.4 0.6 V V V V CCIO- CCIO- OH High output voltage, single pin output 5mA V 0.6 0.4 Vhys I/O Schmitt trigger voltage hysteresis 150 mV CIO I/O pin capacitance 5 pF RPU Pull-up equivalent resistance 30 40 55 kΩ RPD Pull-down equivalent resistor 30 40 55 kΩ tf(IO)out Output high to low level fall time 6.5 ns tr(IO)out Output low to high level rise time 11 ns Note: The above parameters are guaranteed by design. V2.5 10 Document Outline 1. Overview 2. Features 3. Pinouts 4. Pin Definitions 5. Function Parameter Descriptions 5.1 Overview 5.2 Basic Parameters 5.3 Port Parameter 5.4 Default Configuration 6. Function Descriptions 6.1 UART 6.1.1 Serial Baud Rate 6.2 Other Hardware 7. Parameters 7.1 Absolute Maximum Value 7.2 Electrical Parameters 7.3 Power Consumption 7.4 AC Electrical Characteristics and Timing 8. Package Information 8.1 TSSOP20 8.2 LQFP64M 9. Applications 9.1 CH9121T Reference Circuit 9.2 CH9121A Reference Circuit
7. Parameters 7.1 Absolute Maximum Value
(Critical or exceeding the absolute maximum value will probably cause the chip to work improperly or even be damaged) Table 7-1 Absolute maximum Symbol Parameter Min. Max. Unit TA Ambient temperature during operation -40 85 ℃ TJ Junction temperature range -40 100 ℃ TS Ambient temperature during storage -55 150 ℃ VCC33 Operating power supply voltage -0.4 4.0 V VCCIO I/O power supply voltage -0.4 4.0 V VDDK Power supply decoupling terminal for core analog circuits -0.4 1.5 V VETH Voltage on ETH physical signal pin -0.4 VCC33+0.4 V VIN Input voltage on pin -0.4 VCCIO+0.4 V VESD(HBM) ESD voltage (HBM) for common I/O pins 6K V Sinking current on I/O pin 20 IIO mA Output current on I/O pin 20
7.2 Electrical Parameters
Table 7-2 Electrical Parameters (VCC33 = 3.3V, VCCIO = 3.3V, TA = 25℃) Symbol Parameter Min. Typ. Max. Unit VCC33 Operating power supply voltage 3.2 3.3 3.4 V VCCIO I/O power supply voltage 1.7 3.3 3.6 V V V CCIO = 3.3V 0 0.8 IL I/O pin, input low voltage V VCCIO = 1.8V 0 0.6 V V CCIO = 3.3V 2.0 VCCIO IH I/O pin, input high voltage V VCCIO = 1.8V 1.2 VCCIO VOL Low output voltage, single pin sinks 5mA 0.4 0.6 V V V V CCIO- CCIO- OH High output voltage, single pin output 5mA V 0.6 0.4 Vhys I/O Schmitt trigger voltage hysteresis 150 mV CIO I/O pin capacitance 5 pF RPU Pull-up equivalent resistance 30 40 55 kΩ RPD Pull-down equivalent resistor 30 40 55 kΩ tf(IO)out Output high to low level fall time 6.5 ns tr(IO)out Output low to high level rise time 11 ns Note: The above parameters are guaranteed by design. V2.5 10 Document Outline 1. Overview 2. Features 3. Pinouts 4. Pin Definitions 5. Function Parameter Descriptions 5.1 Overview 5.2 Basic Parameters 5.3 Port Parameter 5.4 Default Configuration 6. Function Descriptions 6.1 UART 6.1.1 Serial Baud Rate 6.2 Other Hardware 7. Parameters 7.1 Absolute Maximum Value 7.2 Electrical Parameters 7.3 Power Consumption 7.4 AC Electrical Characteristics and Timing 8. Package Information 8.1 TSSOP20 8.2 LQFP64M 9. Applications 9.1 CH9121T Reference Circuit 9.2 CH9121A Reference Circuit