DS1088C Fixed-Frequency EconOscillatorTM General Description The DS1088C is a low-cost clock generator that produces a square-wave output without external timing components. The fixed-frequency oscillator is available in a factory-calibrated frequency of 133MHz. The device has a power-down pin for power-sensitive applications. Applications Printers Features S Factory-Programmed, 133MHz Square-Wave Generator S Single Output S No External Timing Components Required S 2.7V to 3.6V Supply S Power-Down Mode S Wide Temperature Range (-20C to +85C) Copiers Typical Operating Circuit Automotive Telematics Computer Peripherals POS Terminals Cable Modems 133MHz OUTPUT OUT DNC DS1088C VCC Ordering Information appears at end of data sheet. VCC DNC VCC PDN GND GND VCC DECOUPLING CAPACITORS (0.1F AND 0.01F) EconOscillator is a trademark of Maxim Integrated Products, Inc. For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/DS1088C.related For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com. 19-6186; Rev 0; 3/12 DS1088C Fixed-Frequency EconOscillatorTM ABSOLUTE MAXIMUM RATINGS (Voltages relative to ground.) Voltage Range on VCC..........................................-0.5V to +6.0V Voltage Range on PDN............................ -0.5V to (VCC + 0.5V)* Operating Temperature Range........................... -20C to +85C Storage Temperature Range............................. -55C to +125C Lead Temperature (TDFN only; soldering, 10s)..............+300C Soldering Temperature (reflow).......................................+260C *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 = -20NC to +85NC, unless otherwise noted.) PARAMETER SYMBOL Supply Voltage VCC High-Level Input Voltage (PDN) VIH Low-Level Input Voltage (PDN) VIL CONDITIONS (Note 1) MIN TYP 2.7 0.7 x VCC -0.3 MAX UNITS 3.6 V VCC + 0.3 V 0.3 x VCC V DC ELECTRICAL CHARACTERISTICS (VCC = 2.7V to 3.6V, TA = -20NC to +85NC, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX VCC 0.4 UNITS 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 FA Low-Level Input Current (PDN) IIL VIL = 0V Supply Current (Active) Standby Current (Power-Down) ICC ICCQ V -1 VCC = 3.6V, CL = 15pF, fO = 133MHz FA 15 Power-down mode 24 mA 10 FA MAX UNITS OSCILLATOR CHARACTERISTICS--TDFN (VCC = 2.7V to 3.6V, TA = -20NC to +85NC, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP Output Frequency Range Available fO Output Frequency Tolerance fO fO VCC = 3.3V, TA = +25NC (Note 2) -0.3 +0.3 % Voltage Frequency Variation fV fO Over voltage range, TA = +25NC (Note 3) -0.35 +0.35 % Temperature Frequency Variation fT fO Over temperature range, VCC = 3.3V (Notes 4, 5) -20NC to +25NC -0.7 +0.7 +25NC to +85NC -0.5 +0.5 -1.0 +1.0 Frequency Variation Over Voltage and Temperature Maxim Integrated fV,T fO 133.3 Over voltage and temperature range MHz % % 2 DS1088C Fixed-Frequency EconOscillatorTM OSCILLATOR CHARACTERISTICS--WLP (VCC = 2.7V to 3.6V, TA = -20NC to +85NC, unless otherwise noted.) PARAMETER Output Frequency SYMBOL CONDITIONS MIN fO TYP MAX 133.3 Output Frequency Tolerance fO fO VCC = 3.3V, TA = +25NC (Note 2) Voltage Frequency Variation fV fO Over voltage range, TA = +25NC (Note 3) Temperature Frequency Variation fT fO Over temperature range, VCC = +3.3V (Notes 4, 5) Frequency Variation Over Voltage and Temperature fT fO Over voltage and temperature range UNITS MHz -3 +3 % -3.5 +3.5 % -20NC to +25NC -7 +7 +25NC to +85NC -5 +5 -10 +10 % MAX UNITS % AC ELECTRICAL CHARACTERISTICS (VCC = 2.7V to 3.6V, TA = -20NC to +85NC, unless otherwise noted.) PARAMETER Power-Up Time OUT Disabled After Entering Power-Down Mode Load Capacitance Output Duty Cycle (OUT) SYMBOL CONDITIONS MIN TYP tPOR + tSTAB (Note 6) 100 Fs tPDN (Note 7) 7 Fs CL (Note 8) 50 pF 60 % 15 40 Note 1: All voltages are referenced to ground. Note 2: Typical frequency shift due to aging is within 0.2%. Aging stressing includes level 1 moisture reflow preconditioning (24hr +125C bake, 168hr +85C/85%RH moisture soak, and three solder reflow passes +240C +0C/-5C peak) followed by1000hr (max) VCC biased +125C OP/L, 1000hr unbiased +150C bake, 1000 temperature cycles at -55C to +125C and 168hr +121C/2 ATM steam/unbiased autoclave. Note 3: This is the change in output frequency due to changes in voltage at TA = +25C. Note 4: Guaranteed by design. Note 5: This is the change in output frequency due to changes in temperature from the +25C frequency at VCC = 3.3V. Note 6: 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 7: Output disabled in two cycles or less of the output frequency. Note 8: Output voltage swings may be impaired at high frequencies combined with high-output loading. Maxim Integrated 3 DS1088C Fixed-Frequency EconOscillatorTM Typical Operating Characteristics (VCC = 3.3V, TA = +25C, unless otherwise noted.) ACTIVE SUPPLY CURRENT vs. SUPPLY VOLTAGE 9 8 7 6 5 15 7 6 5 5 30 55 10 9 3.1 6 3.3 3.5 2.9 2.7 3.3 3.1 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 1.7 0.10 0.05 0 -0.05 -0.10 1.5 5 30 55 -0.20 80 2.9 2.7 TEMPERATURE (C) 3.1 3.3 DS1088E toc06 -0.2 TA = +25C CL || RL = 1.8pF || 500 -20 55 30 5 SUPPLY VOLTAGE (V) 80 TEMPERATURE (C) DUTY CYCLE vs. TEMPERATURE 56 DS1088C toc07 56 55 VCC = 3.3V 55 54 54 DUTY CYCLE (%) DUTY CYCLE (%) -0.1 -0.4 3.5 DUTY CYCLE vs. SUPPLY VOLTAGE 53 52 51 53 52 51 50 50 TA = +25C CL || RL = 1.8pF || 500 49 2.7 2.9 3.1 3.3 SUPPLY VOLTAGE (V) Maxim Integrated 0 -0.3 TA = +25C CL || RL = 1.8pF || 500 -0.15 1.6 0.1 DS1088C toc08 2.2 VCC = 3.3V 0.2 FREQUENCY ERROR (%) FREQUENCY ERROR (%) 2.3 0.15 3.5 0.3 DS1088C toc05 0.20 DS1088C toc04 VPDN = 0V VCC = 3.3V -20 11 TEMPERATURE (C) 2.5 2.4 2.9 2.7 80 12 7 3 -20 13 8 4 3 CL = 15pF TA = +25C 14 8 4 SHUTDOWN CURRENT (A) CL = 1.8pF TA = +25C DS1088C toc02 10 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 9 CL = 1.8pF SUPPLY CURRENT (mA) VCC = 3.3V DS1088C toc01 10 ACTIVE SUPPLY CURRENT vs. SUPPLY VOLTAGE DS1088C toc03 ACTIVE SUPPLY CURRENT vs. TEMPERATURE 49 3.5 TA = +25C CL || RL = 1.8pF || 500 48 -20 5 30 55 80 TEMPERATURE (C) 4 DS1088C Fixed-Frequency EconOscillatorTM Pin/Bump Configurations TOP VIEW DNC DNC PDN GND 8 7 6 5 DS1088C TOP VIEW 1 2 A OUT GND B VCC PDN + DS1088C EP + 1 2 3 4 OUT VCC VCC GND WLP TDFN (3mm x 3mm) Pin/Bump Descriptions PIN/BUMP TDFN-EP WLP 1 A1 2, 3 4, 5 NAME FUNCTION OUT Oscillator Output B1 VCC Power Supply A2 GND Ground 6 B2 PDN Active-Low Power-Down. When the pin is high, the oscillator is enabled. When the pin is low, the oscillator is disabled (power-down mode). 7, 8 -- DNC Do Not Connect. The DNC pins are internally connected to ground. -- -- EP Maxim Integrated Exposed Pad (TDFN Only). Internally connected to GND. Connect to the ground plane to minimize noise injection. Not intended for use as the device electrical ground. 5 DS1088C Fixed-Frequency EconOscillatorTM Detailed Description The DS1088C is a low-cost clock generator that produces a square-wave output without external timing components. 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 factoryprogrammed 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 10s for deglitching purposes. On power-up, the output is disabled until power is stable and the voltage-controlled oscillator has generated 512 clock cycles. VCC Applications Information Power-Supply Decoupling To achieve the best results when using the DS1088C, the power supply must be decoupled with 0.01F and 0.1F 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 as possible to the VCC and GND pins. Chip Information SUBSTRATE CONNECTED TO GROUND VCC EEPROM CONTROL PDN VOLTAGECONTROLLED OSCILLATOR 80MHz TO 160MHz PRESCALER / BY 1, 2, 4...256 OUT 133MHz GND DS1088C Figure 1. Block Diagram Maxim Integrated 6 DS1088C Fixed-Frequency EconOscillatorTM Ordering Information FREQUENCY (MHz) TEMP RANGE PIN-PACKAGE DS1088CN-133+T PART 133.3 -20NC to +85NC 8 TDFN-EP* DS1088CX-133+T 133.3 -20NC to +85NC 4 WLP +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. *EP = Exposed pad. Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. 8 TDFN-EP T833+2 21-0137 90-0059 4 WLP W41D1+1 21-0455 Refer to Application Note 1891 Maxim Integrated LAND PATTERN NO. 7 DS1088C Fixed-Frequency EconOscillatorTM Revision History REVISION NUMBER REVISION DATE 0 3/12 DESCRIPTION Initial release PAGES CHANGED -- Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 (c) 2012 Maxim Integrated Products, Inc. 8 Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.