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ST7LITEUS5 数据表(PDF) 95 Page - STMicroelectronics |
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ST7LITEUS5 数据表(HTML) 95 Page - STMicroelectronics |
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95 / 136 page ![]() Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) ST7LITEUS2, ST7LITEUS5 Electrical characteristics 95/136 Figure 39. fCPU maximum operating frequency versus VDD supply voltage 12.3.2 Operating conditions with low voltage detector (LVD) TA = -40 to 125 °C, unless otherwise specified fCPU [MHz] SUPPLY VOLTAGE [V] 8 4 2 0 2.0 2.4 3.3 3.5 4.0 4.5 5.0 FUNCTIONALITY NOT GUARANTEED IN THIS AREA 5.5 FUNCTIONALITY GUARANTEED IN THIS AREA (UNLESS OTHERWISE STATED IN THE TABLES OF PARAMETRIC DATA) 2.7 Table 47. Operating characteristics with LVD Symbol Parameter Conditions Min Typ Max Unit VIT+(LVD) Reset release threshold (VDD rise) High threshold Med. threshold Low threshold 3.9 3.2 2.5 4.2 3.5 2.7 4.5 3.8 3.0 V VIT-(LVD) Reset generation threshold (VDD fall) High threshold Med. threshold Low threshold 3.7 3.0 2.4 4.0 3.3 2.6 4.3 3.6 2.9 Vhys LVD voltage threshold hysteresis VIT+(LVD)-VIT-(LVD) 150 mV VtPOR VDD rise time rate (1)(2) 1. Not tested in production. The VDD rise time rate condition is needed to ensure a correct device power-on and LVD reset release. When the VDD slope is outside these values, the LVD may not release properly the reset of the MCU 2. Use of LVD with capacitive power supply: with this type of power supply, if power cuts occur in the application, it is recommended to pull VDD down to 0V to ensure optimum restart conditions. Refer to circuit example in Figure 61 on page 114. 20 μs/V IDD(LVD) (3) 3. Not tested in production. LVD/AVD current consumption VDD = 5 V 220 μA Obsolete Product(s) - Obsolete Product(s) |
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