general description the ds1088c is a low-cost clock generator that produces a square-wave output without external timing compo - nents. 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 copiers computer peripherals pos terminals cable modems features factory-programmed, 133mhz square-wave generator single output no external timing components required 2.7v to 3.6v supply power-down mode wide temperature range (-20c to +85c) ordering information appears at end of data sheet. 19-6186; rev 1; 4/15 for related parts and recommended products to use with this part, refer to www.maximintegrated.com/ds1088c.related . econoscillator is a trademark of maxim integrated products, inc. v cc out pdn dnc gnd v cc v cc v cc decoupling capacitors (0.1f and 0.01f) dnc gnd 133mhz output ds1088c ds1088c fixed-frequency econoscillator? typical operating circuit downloaded from: http:///
(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 (tdfn only; soldering, 10s)..............+300c soldering temperature (reflow).......................................+260c * not to exceed +6.0v. (t a = -20c to +85c, unless otherwise noted.) (v cc = 2.7v to 3.6v, t a = -20c to +85c, unless otherwise noted.) (v cc = 2.7v to 3.6v, t a = -20c to +85c, unless otherwise noted.) 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 a low-level input current ( pdn ) i il v il = 0v -1 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 a parameter symbol conditions min typ max units output frequency range available f o 133.3 mhz output frequency tolerance v cc = 3.3v, t a = +25c (note 2) -0.3 +0.3 % voltage frequency variation over voltage range, t a = +25c (note 3) -0.35 +0.35 % temperature frequency variation over temperature range, v cc = 3.3v (notes 4, 5) -20c to +25c -0.7 +0.7 % +25c to +85c -0.5 +0.5 frequency variation over voltage and temperature over voltage and temperature range -1.0 +1.0 % o o f f ? v o f f ? t o f f ? v,t o f f ? ds1088c fixed-frequency econoscillator? www.maximintegrated.com maxim integrated 2 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 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 conditionsdc electrical characteristics oscillator characteristicstdfn downloaded from: http:///
(v cc = 2.7v to 3.6v, t a = -20c to +85c, unless otherwise noted.) (v cc = 2.7v to 3.6v, t a = -20c to +85c, unless otherwise noted.) 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. o o f f ? v o f f ? t o f f ? t o f f ? parameter symbol conditions min typ max units output frequency f o 133.3 mhz output frequency tolerance v cc = 3.3v, t a = +25c (note 2) -3 +3 % voltage frequency variation over voltage range, t a = +25c (note 3) -3.5 +3.5 % temperature frequency variation over temperature range, v cc = +3.3v (notes 4, 5) -20c to +25c -7 +7 % +25c to +85c -5 +5 frequency variation over voltage and temperature over voltage and temperature range -10 +10 % parameter symbol conditions min typ max units power-up time t por + t stab (note 6) 100 s out disabled after entering power-down mode t pdn (note 7) 7 s load capacitance c l (note 8) 15 50 pf output duty cycle (out) 40 60 % ds1088c fixed-frequency econoscillator? www.maximintegrated.com maxim integrated 3 oscillator characteristicswlpac electrical characteristics downloaded from: http:///
(v cc = 3.3v, t a = +25c, unless otherwise noted.) active supply current vs. supply voltage ds1088c 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 active supply current vs. supply voltage ds1088c 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 shutdown supply current vs. temperature ds1088c 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 2.51.5 -20 v pdn = 0v v cc = 3.3v frequency error vs. supply voltage ds1088c 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 ? frequency error vs. temperature ds1088e 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 t a = +25c c l || r l = 1.8pf || 500 duty cycle vs. supply voltage ds1088c toc07 supply voltage (v) duty cycle (%) 3.1 2.9 3.3 50 51 52 53 54 55 5649 2.7 3.5 t a = +25c c l || r l = 1.8pf || 500 active supply current vs. temperature ds1088c 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 duty cycle vs. temperature ds1088c toc08 temperature (c) duty cycle (%) 80 55 5 30 49 50 51 52 5453 55 5648 -20 v cc = 3.3v t a = +25c c l || r l = 1.8pf || 500 maxim integrated 4 www.maximintegrated.com ds1088c fixed-frequency econoscillator? typical operating characteristics downloaded from: http:///
pin/bump name function tdfn-ep wlp 1 a1 out oscillator output 2, 3 b1 v cc power supply 4, 5 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 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. 1 3 4 + 8 6 5 dnc pdn gnd ep 2 7 dnc out v cc gnd v cc tdfn (3mm x 3mm) top view ab 1 2 out gnd v cc pdn + top view wlp ds1088c ds1088c ds1088c fixed-frequency econoscillator? www.maximintegrated.com maxim integrated 5 pin/bump descriptions pin/bump conigurations downloaded from: http:///
detailed description the ds1088c is a low-cost clock generator that produces a square-wave output without external timing compo - nents. 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 factory- programmed prescaler to produce an output frequency of 133mhz. power-down mode the pdn pin disables the internal oscillator and the oscil - lator 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 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 v cc and gnd pins. figure 1. block diagram v cc pdn out133mhz eeprom control voltage- controlled oscillator 80mhz to 160mhz prescaler by 1, 2, 4...256 gnd v cc ds1088c ds1088c fixed-frequency econoscillator? www.maximintegrated.com maxim integrated 6 chip information substrate connected to ground downloaded from: http:///
+denotes lead(pb)-free/rohs-compliant package. t = tape and reel. * ep = exposed pad. part frequency (mhz) temp range pin-package ds1088cn-133+t 133.3 -20c to +85c 8 tdfn-ep* ds1088cx-133+t 133.3 -20c to +85c 4 wlp package type package code outline no. land pattern no. 8 tdfn-ep t833+2 21-0137 90-0059 4 wlp w41d1+1 21-0455 refer to application note 1891 ds1088c fixed-frequency econoscillator? www.maximintegrated.com maxim integrated 7 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. ordering information downloaded from: http:///
revision number revision date description pages changed 0 3/12 initial release 1 4/15 removed automotive reference from data sheet 1 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 speciications without n otice 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 and the maxim integrated logo are trademarks of maxim integrated products, inc. ? 2015 maxim integrated products, inc. 8 ds1088c fixed-frequency econoscillator? revision history for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:///
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