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L9950 数据表(PDF) 16 Page - STMicroelectronics |
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L9950 数据表(HTML) 16 Page - STMicroelectronics |
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16 / 23 page ![]() L9950 16/23 Table 10. SPI - ELECTRICAL CHARACTERISTICS (VS = 8 to 16V, VCC = 4.5 to 5.3V, Tj = - 40 to 150 °C, unless otherwise specified. The voltages are referred to GND and currents are assumed positive, when the current flows into the pin). Note: 1. Value of input capacity is not measured in production test. Parameter guaranteed by design. 2. DI timing parameters tested in production by a passed/failed test: Tj=-40°C/+25°C: SPI communication @2MHZ Tj=+125°C: SPI communication @1.25MHZ Symbol Parameter Test Condition Min. Typ. Max. Unit Delay time from standby to active mode tset delay time Switching from standby to active mode. Time until output drivers are enabled after CSN going to high. 160 300 µs Inputs: CSN, CLK, PWM1/2 and DI VinL input low level VCC = 5V 1.5 2.0 V VinH input high level VCC = 5V 3.0 3.5 V VinHyst input hysteresis VCC = 5V 0.5 V ICSN in pull up current at input CSN VCSN = 3.5V VCC = 5V -40 -20 -8 µA ICLK in pull down current at input CLK VCLK = 1.5V 10 25 50 µA IDI in pull down current at input DI VDI = 1.5V 10 25 50 µA IPWM1 in pull down current at input PWM1 VPWM = 1.5V 10 25 50 µA C in 1 input capacitance at input CSN, CLK, DI and PWM1/2 VCC = 0 to 5.3V 10 15 pF DI timing (see figure 5 and figure 7)2 tCLK clock period VCC = 5V 1000 ns tCLKH clock high time VCC = 5V 400 ns tCLKL clock low time VCC = 5V 400 ns tset CSN CSN setup time, CSN low before rising edge of CLK VCC = 5V 400 ns tset CLK CLK setup time, CLK high before rising edge of CSN VCC = 5V 400 ns tset DI DI setup time VCC = 5V 200 ns thold time DI hold time VCC = 5V 200 ns tr in rise time of input signal DI, CLK, CSN VCC = 5V 100 ns tf in fall time of input signal DI, CLK, CSN VCC = 5V 100 ns |
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