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ST7LITE1XB 数据表(PDF) 124 Page - STMicroelectronics |
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ST7LITE1XB 数据表(HTML) 124 Page - STMicroelectronics |
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124 / 157 page  ST7LITE1xB 124/157 CLOCK AND TIMING CHARACTERISTICS (Cont’d) 13.5.4 Crystal and Ceramic Resonator Oscillators The ST7 internal clock can be supplied with ten different Crystal/Ceramic resonator oscillators. All the information given in this paragraph are based on characterization results with specified typical external components. In the application, the reso- nator and the load capacitors have to be placed as close as possible to the oscillator pins in order to minimize output distortion and start-up stabiliza- tion time. Refer to the crystal/ceramic resonator manufacturer for more details (frequency, pack- age, accuracy...). Notes: 1. Resonator characteristics given by the ceramic resonator manufacturer. For more information on these resonators, please consult www.murata.com 2. SMD = [-R0: Plastic tape package (∅ =180mm)] LEAD = [-B0: Bulk] 3. () means load capacitor built in resonator Figure 79. Typical Application with a Crystal or Ceramic Resonator Symbol Parameter Conditions Min Typ Max Unit fCrOSC Crystal Oscillator Frequency 2 16 MHz CL1 CL2 Recommended load capacitance ver- sus equivalent serial resistance of the crystal or ceramic resonator (RS) See table below pF Supplier fCrOSC (MHz) Typical Ceramic Resonators1) CL1 3) [pF] CL2 3) [pF] Rd [ Ω] Supply Voltage Range [V] Temperature Range [°C] Type2) Reference 1 SMD CSBFB1M00J58-R0 220 220 2.2k 3.3V to 5.5V -40 to 85 LEAD CSBLA1M00J58-B0 220 220 2.2k 2 SMD CSTCC2M00G56Z-R0 (47) (47) 0 3.0V to 5.5V 4 SMD CSTCR4M00G53Z-R0 (15) (15) 0 LEAD CSTLS4M00G53Z-B0 (15) (15) 0 8 SMD CSTCE8M00G52Z-R0 (10) (10) 0 LEAD CSTLS8M00G53Z-B0 (15) (15) 0 12 SMD CSTCE12M0G52Z-R0 (10) (10) 0 3.3V to 5.5V 16 SMD CSTCE16M0V51Z-R0 (5) (5) 0 LEAD CSTLS16M0X51Z-B0 (5) (5) 0 OSC2 OSC1 fOSC CL1 CL2 i2 ST7LITE1xB RESONATOR WHEN RESONATOR WITH INTEGRATED CAPACITORS Rd |
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