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ST72334J bảng dữ liệu(PDF) 110 Page - STMicroelectronics |
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ST72334J bảng dữ liệu(HTML) 110 Page - STMicroelectronics |
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110 / 125 page  ST72334J/N, ST72314J/N, ST72124J 110/125 SUPPLY, RESET AND CLOCK CHARACTERISTICS (Cont’d) Notes: 1) Unless otherwise specified, typical data are based on TA=25°C and VDD-VSS=5V. They are given only as design guide- lines and are not tested. 2) These data are based on typical RSmax. The oscillator selection can be optimized in terms of supply current with high quality resonator. 3) RSmax is the equivalent serial resistance of the crystal or ceramic resonator. 4) Data based on design simulation and/or technology characteristics, not tested in production. 5) Data based on characterization results, not tested in production. 6) In this condition, the capacitor to be considered is the global parasitic capacitor. In this case, the RC oscillator frequen- cy tuning has to be done by trying out several resistor values. CRYSTAL AND CERAMIC RESONATOR OSCILLATORS Symbol Parameter Condition s Min Typ 1) Max Unit fOSC Oscillator Frequency 2) Low speed resonator Medium-low speed resonator Medium-high speed resonator High speed resonator 1 >2 >4 >8 2 4 8 16 MHz CLi Low speed Load Medium-low speed Capacitance Medium-high speed High speed RSmax=200Ω 3) RSmax=200Ω 3) RSmax=200Ω 3) RSmax=100Ω 3) 38 4) 32 4) 18 4) 15 4) 47 39 22 18 56 4) 46 4) 26 4) 21 4) pF IDD Low speed Supply Medium-low speed Current Medium-high speed High speed 150 200 400 700 700 5) 700 5) 750 5) 1100 5) µA tSTART Oscillator start-up time Depends on resonator quality. A typical value is 10ms EXTERNAL RC OSCILLATO R Symbol Parameter Condition s Min 4) Typ 1) Max Unit fOSC External RC Oscillator Frequency VDD=5V 114 4) MHz REX Oscillator External Resistance 10 33 47 4) k Ω CEX Oscillator External Capacitance 0 6) 47 470 4) pF IDD Supply Current 525 750 5) µA INTERNAL RC OSCILLATOR Symbol Parameter Condition s Min Typ 1) Max Unit fOSC Internal RC Oscillator Frequency VDD=5.5V 3.50 4.25 5.00 MHz VDD=3.0V 3.35 4.10 4.85 IDD Supply Current 500 750 5) µA CLOCK SECURITY SYSTEM (CSS) Symbol Parameter Conditions Min Typ 1) Max Unit fSFOSC Safe Oscillator Frequency VDD=5.5V 250 340 430 kHz VDD=3.0V 190 260 330 fCFL Clock Filter Frequency limitation 30 MHz IDD Supply Current 150 350 5) µA |
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