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ST7263BEx 데이터시트(PDF) 141 Page - STMicroelectronics |
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ST7263BEx 데이터시트(HTML) 141 Page - STMicroelectronics |
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141 / 186 page ![]() ST7263Bxx Electrical characteristics Doc ID 7516 Rev 8 141/186 13.3 Operating conditions Figure 54. fCPU maximum operating frequency versus VDD supply voltage 13.3.1 Operating conditions with low voltage detector (LVD) Subject to general operating conditions for VDD, fCPU, and TA. Refer to Figure 12 on page 33. Table 58. General operating conditions Symbol Parameter Conditions Min Typ Max Unit VDD Operating Supply Voltage fCPU = 8 MHz 45 5.5 V VDDA Analog reference voltage VDD -VDD VSSA Analog reference voltage VSS -VSS fCPU Operating frequency fOSC = 24 MHz - - 8 MHz fOSC = 12 MHz - - 4 TA Ambient temperature range 0 - 70 °C fCPU [MHz] SUPPLY VOLTAGE [V] 8 4 2 0 2.5 3.0 3.5 4 4.5 5 5.5 FUNCTIONALITY FUNCTIONALITY GUARANTEED FROM 4 TO 5.5 V NOT GUARANTEED IN THIS AREA Table 59. Operating conditions with LVD Symbol Parameter Conditions Min Typ Max Unit VIT+ Low voltage reset threshold (VDD rising) VDD max. variation 50 V/ms 3.4 3.7 4.0 V VIT- Low voltage reset threshold (VDD falling) VDD max. variation 50V/ms 3.2 3.5 3.8 V Vhyst Hysteresis (VIT+ - VIT-) (1) 1. Guaranteed by characterization - not tested in production. 100 175 220 mV VtPOR VDD rise time rate (2) 2. The VDD rise time rate condition is needed to insure a correct device power-on and LVD reset. Not tested in production. 0.5 - 50 V/ms |
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