????????????????????????????????????????????????????????????????? maxim integrated products 1 general description the ds1088l 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 factory-calibrated frequencies from 312khz to 133mhz. the device has a power-down pin for power-sensitive applications. applications printers copiers automotive telematics computer peripherals pos terminals cable modems features s factory-programmed square-wave generator from 321khz to 133mhz s single output s no external timing components required s 2.7v to 3.6v supply s power-down mode s 1% frequency tolerance over temperature and voltage s wide temperature range (-20c to +85c) typical operating circuit 19-6184; rev 2; 1/12 ordering information appears at end of data sheet. econoscillator is a trademark of maxim integrated products, inc. for related parts and recommended products to use with this part, refer to: www.maxim-ic.com/ds1088l.related v cc out pdn dnc gnd v cc v cc v cc decoupling capacitors (0.1f and 0.01f) dnc gnd 312khz to 133mhz output ds1088l ds1088l fixed-frequency econoscillator? for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxims website at www.maxim-ic.com.
????????????????????????????????????????????????????????????????? maxim integrated products 2 ds1088l fixed-frequency econoscillator? (voltages relative to ground.) voltage range on v cc ......................................... -0.5v to +6.0v voltage range on pdn ........................... -0.5v to (v cc + 0.5v)* operating temperature range .......................... -20c to +85c storage temperature range ............................ -55c to +125c lead temperature (soldering, 10s) ................................ +300c soldering temperature (reflow) ...................................... +260c absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional opera - tion 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 (t a = -20 n c to +85 n c, unless otherwise noted.) dc electrical characteristics (v cc = 2.7v to 3.6v, t a = -20 n c to +85 n c, unless otherwise noted.) * not to exceed +6.0v. parameter symbol conditions min typ max units supply voltage v cc (note 1) 2.7 3.6 v high-level input voltage ( pdn ) v ih 0.7 x v cc v cc + 0.3 v low-level input voltage ( pdn ) v il -0.3 0.3 x v cc v parameter symbol conditions min typ max units high-level output voltage (out) v oh i oh = -4ma, v cc = min v cc - 0.4 v low-level output voltage (out) v ol i ol = 4ma 0.4 v high-level input current ( pdn ) i ih v cc = 3.6v 1 f a low-level input current ( pdn ) i il v il = 0v -1 f a supply current (active) i cc v cc = 3.6v, c l = 15pf, f o = 133mhz 15 24 ma standby current (power-down) i ccq power-down mode 10 f a
????????????????????????????????????????????????????????????????? maxim integrated products 3 ds1088l fixed-frequency econoscillator? 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) v cc 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 t a = +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 v cc = 3.3v. note 6: this indicates the time elapsed between power-up and the output becoming active. an on-chip delay is intentionally intro - duced to allow the oscillator to stabilize. t stab is equivalent to approximately 512 clock cycles and will depend on the pro - grammed 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. oscillator characteristics (v cc = 2.7v to 3.6v, t a = -20 n c to +85 n c, unless otherwise noted.) ac electrical characteristics (v cc = 2.7v to 3.6v, t a = -20 n c to +85 n c, unless otherwise noted.) parameter symbol conditions min typ max units output frequency range available f o 0.3124 133.3 mhz output frequency tolerance o o f f ? v cc = 3.3v, t a = +25 n c (note 2) -0.3 +0.3 % voltage frequency variation v o f f ? over voltage range, t a = +25 n c (note 3) -0.35 +0.35 % temperature frequency variation t o f f ? over temperature range, v cc = 3.3v (notes 4, 5) -20 n c to +25 n c -0.7 +0.7 % +25 n c to +85 n c -0.5 +0.5 frequency variation over voltage and temperature v,t o f f ? over voltage and temperature range -1.0 +1.0 % parameter symbol conditions min typ max units power-up time t por + t stab (note 6) 100 f s out disabled after entering power-down mode t pdn (note 7) 7 f s load capacitance c l (note 8) 15 50 pf output duty cycle (out) f o < 80mhz, f o 80mhz 40 60 % f o < 80mhz 50
????????????????????????????????????????????????????????????????? maxim integrated products 4 typical operating characteristics (v cc = 3.3v, t a = +25c, unless otherwise noted.) active supply current vs. temperature ds1088l toc01 temperature (c) supply current (ma) 55 30 5 4 5 6 7 8 9 10 3 -20 80 v cc = 3.3v c l = 1.8pf 133mhz 100mhz 80mhz active supply current vs. supply voltage ds1088l toc02 supply voltage (v) supply current (ma) 3.3 3.1 2.9 4 5 6 7 8 9 10 3 2.7 3.5 t a = +25c c l = 1.8pf 133mhz 100mhz 80mhz active supply current vs. supply voltage ds1088l toc03 supply voltage (v) supply current (ma) 2.9 3.1 3.3 3.5 7 8 9 10 11 12 13 14 15 6 2.7 t a = +25c c l = 15pf 133mhz 100mhz 80mhz shutdown supply current vs. temperature ds1088l toc04 temperature (c) shutdown current (a) 80 55 30 5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 1.5 -20 v pdn = 0v v cc = 3.3v frequency error vs. supply voltage ds1088l toc05 supply voltage (v) frequency error (%) 2.9 3.1 3.3 3.5 -0.15 -0.10 -0.05 0 0.05 0.10 0.15 0.20 -0.20 2.7 t a = +25c c l || r l = 1.8pf || 500 133mhz 100mhz 80mhz frequency error vs. temperature ds1088l toc06 temperature (c) frequency error (%) 80 55 30 5 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 -0.4 -20 v cc = 3.3v 100mhz 133mhz 100mhz 80mhz 80mhz t a = +25c c l || r l = 1.8pf || 500 duty cycle vs. supply voltage ds1088l toc07 supply voltage (v) duty cycle (%) 3.1 2.9 3.3 50 51 52 53 54 55 56 49 2.7 3.5 133mhz 100mhz 80mhz t a = +25c c l || r l = 1.8pf || 500 duty cycle vs. temperature ds1088l toc08 temperature (c) duty cycle (%) 80 55 5 30 49 50 51 52 54 53 55 56 48 -20 133mhz 100mhz 80mhz v cc = 3.3v t a = +25c c l || r l = 1.8pf || 500 ds1088l fixed-frequency econoscillator?
????????????????????????????????????????????????????????????????? maxim integrated products 5 ds1088l fixed-frequency econoscillator? pin description pin configuration pin name function 1 out oscillator output 2, 3 v cc power supply 4, 5 gnd ground 6 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 dnc do not connect. the dnc pins are internally connected to ground. 8 dnc do not connect pdn gnd gnd 1 2 8 7 dnc dnc v cc v cc out top view 3 4 6 5 ds1088l + sop
????????????????????????????????????????????????????????????????? maxim integrated products 6 ds1088l fixed-frequency econoscillator? detailed description the ds1088l 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 factory-calibrated frequencies from 312khz to 133mhz. the device has a power-down pin for power-sensitive applications. a block diagram is shown in figure 1 . output frequency the internal oscillator frequency is divided by the factory- programmed prescaler to produce an output frequency of 312khz to 133mhz. contact the factory for custom frequencies. 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. applications information power-supply decoupling to achieve the best results when using the ds1088l, 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 ade - quate high-frequency response for decoupling applica - tions. these capacitors should be placed as close as possible to the v cc and gnd pins. chip information substrate connected to ground figure 1. block diagram v cc pdn out (312khz to 133mhz) eeprom control voltage- controlled oscillator 80mhz to 160mhz prescaler by 1, 2, 4...256 gnd v cc ds1088l
????????????????????????????????????????????????????????????????? maxim integrated products 7 ds1088l fixed-frequency econoscillator? package information for the latest package outline information and land patterns (footprints), go to www.maxim-ic.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. ordering information note: for more information about custom frequencies, email c ustom_econoscillators_info@maxim-ic.com . + denotes a lead(pb)-free/rohs-compliant package. yyy = frequency part frequency (mhz) temp range pin-package ds1088lu-02+ 2.048 -20 n c to +85 n c 8 sop ds1088lu-10+ 10.0 -20 n c to +85 n c 8 sop ds1088lu-16+ 16.6 -20 n c to +85 n c 8 sop DS1088LU-66+ 66.6 -20 n c to +85 n c 8 sop ds1088lu-100+ 100.0 -20 n c to +85 n c 8 sop ds1088lu-yyy+ (see note) -20 n c to +85 n c 8 sop package type package code outline no. land pattern no. 8 sop u8+1 21-0036 90-0092
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. 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 products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 8 ? 2012 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 10/04 initial release 1 5/05 updated the oscillator characteristics table and added note 8 3 2 1/12 added lead(pb)-free ordering option to the ordering information table; added the lead and soldering temperature information to the absolute maximum ratings section 1, 2 ds1088l fixed-frequency econoscillator?
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