DS1090U-32+T

DS1090 Low-Frequency, Spread-Spectrum EconOscillator General Description Features The DS1090 is a low-cost, dithered oscillator intended Low-Cost, Spread-Spectrum EconOscillator to be used as an external clock for switched-mode Simple User Programming power supplies and other low-frequency applications. The Output Frequency Programmable from 125kHz to 8MHz dithering or sweeping function reduces peak-radiated Dither Percentage Programmable from 0% to 8% emissions from the power supply at its fundamental frequency, as well as harmonic frequencies. The device Dither Rate Programmable (f /512, 1024, 2048, MOSC consists of a resistor-programmed master oscillator, fac- or 4096) tory-programmed clock prescaler, and a pin-programmed 3.0V to 5.5V Single-Supply Operation dither circuit. These features allow the DS1090 to be used CMOS/TTL-Compatible Output in applications where a spread-spectrum clock is desired to reduce radiated emissions. A combination of factory-set Operating Temperature Range: -40C to +85C prescalers and external resistor allows for output frequencies ranging from 125kHz to 8MHz. Both dither frequency and Ordering Information dither percentage are set using control pins. OUTPUT PIN- PART FREQUENCY PRESCALER PACKAGE RANGE Applications DS1090U-1+ 4MHz to 8MHz 1 8 SOP Switched-Mode Power Supplies DS1090U-2+ 2MHz to 4MHz 2 8 SOP Servers DS1090U-4+ 1MHz to 2MHz 4 8 SOP Printers Embedded Microcontrollers 500kHz to DS1090U-8+ 8 8 SOP 1MHz Industrial Controls 250kHz to DS1090U-16+ 16 8 SOP 500kHz 125kHz to DS1090U-32+ 32 8 SOP 250kHz Typical Operating Circuit Add T for Tape & Reel orders. V V IN OUT Pin Configuration V CC DC-DC STEP-DOWN TOP VIEW CONVERTER V CC OUT JC0 OUT 1 8 JC1 DS1090 JC1 R 2 7 JC0 SET DS1090 R J0 SET V 3 6 J1 CC 45k J1 TO 91k GND GND 4 5 J0 SOP EconOscillator is a trademark of Maxim Integrated Products, Inc. 19-7500 Rev 3 9/16DS1090 Low-Frequency, Spread-Spectrum EconOscillator Absolute Maximum Ratings Voltage Range on V Relative to Ground .........-0.5V to +6.0V Operating Temperature Range ........................... -40C to +85C CC Voltage Range on Input Pins Storage Temperature Range ............................ -55C to +125C Relative to Ground............................... -0.5V to (V + 0.5V), Soldering Temperature ......................................See IPC/JEDEC CC not to exceed 6.0V J-STD-020A Specification Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Recommended DC Operating Conditions (T = -40C to +85C) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) 3.0 5.5 V CC 0.7 x V + CC Input Logic 1 (J0, J1, JC0, JC1) V V IH V 0.3 CC +0.3 x Input Logic 0 (J0, J1, JC0, JC1) V -0.3 V IL V CC DC Electrical Characteristics (V = +3.0V to +5.5V, T = -40C to +85C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS C = 15pF, V = 3.3V, R = 40k 1.4 L CC SET Supply Current I mA CC C = 15pF, V = 5.5V, R = 40k 1.7 3 L CC SET I = -4mA OH High-Level Output Voltage (OUT) V 2.4 V OH V = min CC Low-Level Output Voltage (OUT) V I = 4mA 0.4 V OL OL High-Level Input Current I V = V +1.0 A IH IH CC (J0, J1, JC0, JC1) Low-Level Input Current I V = 0V -1.0 A IL IL (J0, J1, JC0, JC1) Resistor Current I V = max 150 A RES CC Maxim Integrated 2 www.maximintegrated.com