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DS1088C Datasheet(PDF) 6 Page - Maxim Integrated Products |
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DS1088C Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 8 page ����������������������������������������������������������������� Maxim Integrated Products 6 DS1088C Fixed-Frequency EconoOscillator™ Detailed Description The DS1088C is a low-cost clock generator that pro- duces a square-wave output without external timing com- ponents. The fixed-frequency oscillator is available in a factory-calibrated frequency of 133MHz. The DS1088C has a power-down pin for power-sensitive applications. A block diagram of the DS1088C is shown in Figure 1. Output Frequency The internal oscillator frequency is divided by the factory- programmed prescaler to produce an output frequency of 133MHz. Power-Down Mode The PDN pin disables the internal oscillator and the oscillator output for power-sensitive applications. The power-down pin must remain low for at least two output frequency cycles plus 10µs for deglitching purposes. On power-up, the output is disabled until power is stable and the voltage-controlled oscillator has generated 512 clock cycles. Applications Information Power-Supply Decoupling To achieve the best results when using the DS1088C, the power supply must be decoupled with 0.01µF and 0.1µF high-quality, ceramic, surface-mount capacitors. Surface-mount components minimize lead inductance, which improves performance, and tend to have ade- quate high-frequency response for decoupling applica- tions. These capacitors should be placed as close as possible to the VCC and GND pins. Chip Information SUBSTRATE CONNECTED TO GROUND Figure 1. Block Diagram VCC PDN OUT 133MHz EEPROM CONTROL VOLTAGE- CONTROLLED OSCILLATOR 80MHz TO 160MHz PRESCALER ÷ BY 1, 2, 4...256 GND VCC DS1088C |
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