Rev 1; 5/05 Low-Cost Fixed-Frequency EconOscillator™ The DS1088L is a low-cost clock generator that produces a square-wave output without external timing components. The fixed-frequency oscillator is available in factory-calibrated frequencies from 312kHz to 133MHz. The DS1088L has a power-down pin for power-sensitive applications. Applications Printers Features ♦ Factory-Programmed, Square-Wave Generator from 312kHz to 133MHz ♦ Single Output ♦ No External Timing Components Required ♦ 2.7V to 3.6V Supply ♦ Power-Down Mode Copiers ♦ 1.0% Frequency Tolerance Over Temperature and Voltage Automotive Telematics ♦ Wide Temperature Range (-20°C to +85°C) Computer Peripherals POS Terminals Cable Modems Ordering Information FREQUENCY (MHz) TEMP RANGE PIN-PACKAGE DS1088LU-02 2.048 -20°C to +85°C 8 µSOP DS1088LU-10 10.0 -20°C to +85°C 8 µSOP DS1088LU-16 16.6 -20°C to +85°C 8 µSOP DS1088LU-66 66.6 -20°C to +85°C 8 µSOP DS1088LU-100 100.0 -20°C to +85°C 8 µSOP DS1088LU-yyy * -20°C to +85°C 8 µSOP PART yyy = frequency *Email [email protected] for information/questions concerning custom frequencies. Pin Configuration Typical Operating Circuit TOP VIEW 312kHz TO 133MHz OUTPUT OUT DNC DS1088L VCC VCC DNC VCC PDN GND GND VCC OUT 1 8 DNC VCC 2 7 DNC VCC 3 6 PDN 5 GND GND 4 DS1088L DECOUPLING CAPACITORS (0.1µF AND 0.01µF) EconOscillator is a trademark of Dallas Semiconductor. ______________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 DS1088L General Description DS1088L Low-Cost Fixed-Frequency EconOscillator™ ABSOLUTE MAXIMUM RATINGS Voltage Range on VCC Relative to Ground ..........-0.5V to +6.0V Voltage Range on PDN Relative to Ground* ..............................................-0.5V to (VCC + 0.5V) Operating Temperature Range ...........................-20°C to +85°C Storage Temperature Range ............................-55°C to +125°C Soldering Temperature ....................See IPC/JEDEC J-STD-020 *Not to exceed +6.0V. 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 OPERATING CONDITIONS (TA = -20°C to +85°C) PARAMETER SYMBOL Supply Voltage VCC High-Level Input Voltage (PDN) VIH Low-Level Input Voltage (PDN) VIL CONDITIONS (Note 1) MIN TYP 2.7 MAX 3.6 0.7 x VCC -0.3 UNITS V VCC + 0.3 V 0.3 x VCC V DC ELECTRICAL CHARACTERISTICS (VCC = 2.7V to 3.6V, TA = -20°C to +85°C.) PARAMETER SYMBOL High-Level Output Voltage (OUT) VOH IOH = -4mA, VCC = min Low-Level Output Voltage (OUT) VOL IOL = 4mA 0.4 V High-Level Input Current (PDN) IIH VCC = 3.6V 1 µA Low-Level Input Current (PDN) IIL VIL = 0 ICC VCC = 3.6V, CL = 15pF, f0 = 133MHz Supply Current (Active) Standby Current (Power-Down) 2 ICCQ CONDITIONS Power-down mode _____________________________________________________________________ MIN TYP MAX VCC - 0.4 UNITS V -1 µA 15 24 mA 10 µA Low-Cost Fixed-Frequency EconOscillator™ (VCC = 2.7V to 3.6V, TA = -20°C to +85°C.) PARAMETER Output Frequency Range Available SYMBOL CONDITIONS f0 MIN TYP MAX UNITS 0.3124 133.3 MHz Output Frequency Tolerance ∆f0 f0 VCC = 3.3V, TA = +25°C (Note 8) -0.3 +0.3 % Voltage Frequency Variation ∆fV f0 Over voltage range, TA = +25°C (Note 2) -0.35 +0.35 % Temperature Frequency Variation ∆fT f0 Over temperature range, VCC = 3.3V (Notes 3, 4) -20°C to +25°C -0.7 +0.7 +25°C to +85°C -0.5 +0.5 Frequency Variation Over Voltage and Temperature ∆fV,T f0 -1.0 +1.0 % MAX UNITS Over voltage and temperature range % AC ELECTRICAL CHARACTERISTICS (VCC = 2.7V to 3.6V, TA = -20°C to +85°C.) PARAMETER Power-Up Time OUT Disabled After Entering Power-Down Mode Load Capacitance Output Duty Cycle (OUT) SYMBOL CONDITIONS MIN TYP tPOR + tSTAB (Note 5) 100 µs tPDN (Note 6) 7 µs CL (Note 7) 50 pF f0 < 80MHz, f0 ≥ 80MHz f0 < 80MHz 15 40 60 50 % All voltages are referenced to ground. This is the change in output frequency due to changes in voltage at TA = +25°C. This is the change in output frequency due to changes in temperature from the +25°C frequency at VCC = 3.3V. Guaranteed by design. This indicates the time elapsed between power-up and the output becoming active. An on-chip delay is intentionally introduced to allow the oscillator to stabilize. tSTAB is equivalent to approximately 512 clock cycles and will depend on the programmed oscillator frequency. Note 6: Output disabled in 2 cycles or less of the output frequency. Note 7: Output voltage swings may be impaired at high frequencies combined with high-output loading. Note 8: Typical frequency shift due to aging is within ±0.2%. Aging stressing includes level 1 moisture reflow preconditioning (24hr +125°C bake, 168hr +85°C/85%RH moisture soak, and three solder reflow passes +240°C +0°C/-5°C peak) followed by 1000hr (max) VCC biased +125°C OP/L, 1000hr unbiased +150°C bake, 1000 temperature cycles at -55°C to +125°C and 168hr +121°C/2 ATM steam/unbiased autoclave. Note 1: Note 2: Note 3: Note 4: Note 5: _____________________________________________________________________ 3 DS1088L OSCILLATOR CHARACTERISTICS Typical Operating Characteristics (VCC = 3.3V, TA = +25°C, unless otherwise noted.) ACTIVE SUPPLY CURRENT vs. SUPPLY VOLTAGE 9 8 7 CL = 1.8pF TA = +25°C SUPPLY CURRENT (mA) 9 133MHz 6 100MHz 5 15 8 7 133MHz 6 100MHz 5 13 12 11 133MHz 10 9 100MHz 8 4 4 80MHz 7 80MHz 3 3 -20 5 30 2.9 3.1 3.3 3.5 2.7 2.9 3.3 3.1 3.5 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE FREQUENCY ERROR vs. SUPPLY VOLTAGE FREQUENCY ERROR vs. TEMPERATURE 2.1 2.0 1.9 1.8 100MHz VCC = 3.3V 0.2 0.10 0.05 133MHz 0 -0.05 80MHz -0.10 100MHz 0.1 133MHz 0 80MHz -0.1 100MHz -0.2 80MHz 1.7 -0.15 1.6 TA = +25°C CL RL = 1.8pF 500Ω -0.3 -0.20 1.5 -20 5 55 30 2.7 80 2.9 3.1 3.3 -0.4 3.5 -20 55 30 5 SUPPLY VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) DUTY CYCLE vs. TEMPERATURE DUTY CYCLE vs. SUPPLY VOLTAGE 56 DS1088L toc07 56 133MHz 55 VCC = 3.3V 133MHz 55 54 54 53 DUTY CYCLE (%) DUTY CYCLE (%) TA = +25°C CL RL = 1.8pF 500Ω DS1088L toc08 2.2 0.3 FREQUENCY ERROR (%) FREQUENCY ERROR (%) 2.3 0.15 100MHz 52 51 TA = +25°C CL RL = 1.8pF 500Ω 49 2.7 2.9 53 52 100MHz 51 50 80MHz 50 3.1 3.3 DS1088L toc06 0.20 DS1088L toc04 PDN = 0V VCC = 3.3V 2.4 2.7 80 55 80MHz 6 TEMPERATURE (°C) 2.5 3.5 80MHz 49 TA = +25°C CL RL = 1.8pF 500Ω 48 -20 SUPPLY VOLTAGE (V) 4 CL = 15pF TA = +25°C 14 DS1088L toc05 SUPPLY CURRENT (mA) 10 DS1088L toc03 CL = 1.8pF SUPPLY CURRENT (mA) VCC = 3.3V DS1088L toc01 10 ACTIVE SUPPLY CURRENT vs. SUPPLY VOLTAGE DS1088L toc02 ACTIVE SUPPLY CURRENT vs. TEMPERATURE SHUTDOWN CURRENT (µA) DS1088L Low-Cost Fixed-Frequency EconOscillator™ _____________________________________________________________________ 5 30 55 TEMPERATURE (°C) 80 80 Low-Cost Fixed-Frequency EconOscillator™ PIN NAME FUNCTION 1 OUT Oscillator Output 2 VCC Power Supply 3 VCC Power Supply 4 GND Ground 5 GND Ground 6 PDN Power-Down. When the pin is high, the oscillator is enabled. When the pin is low, the oscillator is disabled (power-down mode). 7 DNC Do Not Connect. The DNC pins are internally connected to ground. 8 DNC Do Not Connect 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 Detailed Description The DS1088L is a low-cost clock generator that produces a square-wave output without external timing components. The fixed-frequency oscillator is available in factory-calibrated frequencies from 312kHz to 133MHz. The DS1088L has a power-down pin for power-sensitive applications. A block diagram of the DS1088L is shown in Figure 1. Power-Supply Decoupling To achieve the best results when using the DS1088L, 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 adequate high-frequency response for decoupling applications. These capacitors should be placed as close to the VCC and GND pins as possible. Chip Topology TRANSISTOR COUNT: 4507 SUBSTRATE CONNECTED TO GROUND. Package Information For the latest package outline information, go to www.maxim-ic.com/DallasPackInfo. Output Frequency The internal oscillator frequency is divided by the factory-programmed prescaler to produce an output frequency of 312kHz to 133MHz. See the Standard Frequency Options table for a list of standard frequencies. Contact factory for custom frequencies. VCC VCC EEPROM CONTROL PDN VOLTAGECONTROLLED OSCILLATOR 80MHz TO 160MHz PRESCALER BY 1, 2, 4...256 OUT (312kHz TO 133MHz) GND DS1088L Figure 1. Block Diagram Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. is a registered trademark of Dallas Semiconductor Corporation. DS1088L Pin Description