general description the ds1088l is a low-cost clock generator that pro- duces 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 copiers automotive telematics computer peripherals pos terminals cable modems 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 ? 1.0% frequency tolerance over temperature and voltage ? wide temperature range (-20? to +85?) ds1088l low-cost fixed-frequency econoscillator ______________________________________________ maxim integrated products 1 pdn gnd gnd 1 2 8 7 dnc dnc v cc v cc out top view 3 4 6 5 ds1088l pin configuration v cc out pdn dnc gnd v cc v cc v cc decoupling capacitors (0.1 f and 0.01 f) dnc gnd 312khz to 133mhz output ds1088l t ypical operating circuit ordering information rev 1; 5/05 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. econoscillator is a trademark of dallas semiconductor. part frequency (mhz) temp range pin-package ds1088lu-02 2.048 -20? to +85? 8 ?op ds1088lu-10 10.0 -20? to +85? 8 ?op ds1088lu-16 16.6 -20? to +85? 8 ?op ds1088lu-66 66.6 -20? to +85? 8 ?op ds1088lu-100 100.0 -20? to +85? 8 ?op DS1088LU-YYY * -20? to +85? 8 ?op yyy = frequency * email custom_econoscillators_info@dalsemi.com for information/questions concerning custom frequencies.
ds1088l low-cost fixed-frequency econoscillator 2 _____________________________________________________________________ absolute maximum ratings recommended operating conditions (t a = -20? to +85?) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. 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 dc electrical characteristics (v cc = 2.7v to 3.6v, t a = -20? to +85?.) 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 a low-level input current ( pdn )i il v il = 0 -1 a supply current (active) i cc v cc = 3.6v, c l = 15pf, f 0 = 133mhz 15 24 ma standby current (power-down) i ccq power-down mode 10 ? voltage range on v cc relative to ground ..........-0.5v to +6.0v voltage range on pdn relative to ground* ..............................................-0.5v to (v cc + 0.5v) operating temperature range ...........................-20? to +85? storage temperature range ............................-55? to +125? soldering temperature ....................see ipc/jedec j-std-020 * not to exceed +6.0v.
ds1088l low-cost fixed-frequency econoscillator _____________________________________________________________________ 3 oscillator characteristics (v cc = 2.7v to 3.6v, t a = -20? to +85?.) parameter symbol conditions min typ max units output frequency range available f 0 0.3124 133.3 mhz output frequency tolerance ? f 0 f 0 v cc = 3.3v, t a = +25 c (note 8) -0.3 +0.3 % voltage frequency variation ? f v f 0 over voltage range, t a = +25 c (note 2) -0.35 +0.35 % -20 c to +25? -0.7 +0.7 temperature frequency variation ? f t f 0 over temperature range, v cc = 3.3v (notes 3, 4) +25 c to +85? -0.5 +0.5 % frequency variation over voltage and temperature ? f v,t f 0 over voltage and temperature range -1.0 +1.0 % ac electrical characteristics (v cc = 2.7v to 3.6v, t a = -20? to +85?.) parameter symbol conditions min typ max units power-up time t por + t stab (note 5) 100 ? out disabled after entering power-down mode t pdn (note 6) 7 s load capacitance c l (note 7) 15 50 pf f 0 < 80mhz, f 0 80mhz 40 60 output duty cycle (out) f 0 < 80mhz 50 % note 1: all voltages are referenced to ground. note 2: this is the change in output frequency due to changes in voltage at t a = +25?. note 3: this is the change in output frequency due to changes in temperature from the +25? frequency at v cc = 3.3v. note 4: guaranteed by design. note 5: 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 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 ?.2%. aging stressing includes level 1 moisture reflow preconditioning (24hr +125? bake, 168hr +85?/85%rh moisture soak, and three solder reflow passes +240? +0?/-5? peak) followed by 1000hr (max) v cc biased +125? op/l, 1000hr unbiased +150? bake, 1000 temperature cycles at -55? to +125? and 168hr +121?/2 atm steam/unbiased autoclave.
ds1088l low-cost fixed-frequency econoscillator 4 _____________________________________________________________________ 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 = +25 c 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 = +25 c 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 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 = +25 c 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 = +25 c 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 = +25 c 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 = +25 c c l ?? r l = 1.8pf ?? 500 ? t ypical operating characteristics (v cc = 3.3v, t a = +25?, unless otherwise noted.)
ds1088l low-cost fixed-frequency econoscillator maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it 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. detailed description the ds1088l is a low-cost clock generator that pro- duces 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. output frequency the internal oscillator frequency is divided by the facto- ry-programmed prescaler to produce an output fre- quency of 312khz to 133mhz. see the standard frequency options table for a list of standard frequen- cies. contact 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 10? for deglitching purposes. on power-up, the output is disabled until power is sta- ble 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 0.01? and 0.1? 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 to the v cc 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 . pin description pin name function 1 out oscillator output 2v cc power supply 3v cc 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 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
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