general description the MAX7393/max7394 precision silicon oscillators replace crystals, ceramic resonators, and crystal oscilla - tor modules in systems with a +2.4v to +3.6v operating supply voltage range. the MAX7393/max7394 consist of a temperature-com - pensated precision oscillator with enable (max7394) or autoenable (MAX7393). the MAX7393/max7394 are supplied at specific frequencies, just like crystals and res - onators. output frequency accuracy is guaranteed to be within 0.25% (tdfn) and 1.3% (dfn) (0c to +85c) and 1.0% (tdfn) and 1.8% (dfn) over the -40c to +125c temperature range. the small size and robust operation of the MAX7393/ max7394 make them ideal for space-constrained or envi - ronmentally demanding applications where high accu - racy is required. the high accuracy of the MAX7393/ max7394 is ideal for use in usb applications, computers, and white goods. the MAX7393/max7394 are available in 6-pin, 3mm x 3mm tdfn and 2mm x 2mm dfn packages. they are specified for the -4 0c to +125c temperature range. applications features 0.25% (tdfn) and 1.3% (dfn) total accuracy for 0c to +85c 1.0% (tdfn) and 1.8% (dfn) total accuracy for -40c to +125c resistant to humidity and vibration 12ma operating current (48mhz version) 5ns output rise/fall time 40% to 60% maximum duty cycle no external components required +2.4v to +3.6v operation available factory-set frequencies from 922khz to 48mhz space-saving tdfn and dfn surface-mount packages 19-3876; rev 1; 4/14 selector guide and pin configurations appear at end of data sheet. usb can nodes computers handheld products white goods note: the max7394 is available in factory-set frequencies from 922khz to 48mhz. the MAX7393 is available in factory- set frequencies from 922khz to 20mhz. there are 10 standard frequencies (see the selector guide) with a required 2.5k order increment. nonstandard frequencies are also available with a required 10k order increment. for nonstandard versions, contact factory for availability and ordering information. * the two-letter frequency suffix following the part number is found in the selector guide.+ denotes a lead(pb)-free/rohs-compliant package. part temp range pin-package MAX7393 alt_ _+ -40c to +125c 6 dfn MAX7393att_ _+ -40c to +125c 6 dfn max7394 alt_ _+ -40c to +125c 6 dfn max7394att_ _+ -40c to +125c 6 dfn MAX7393 v cc2 2.4v to 3.6v 6 2 3 gnd i.c. v cc 1 c clock 5 osc1 clkin 4 osc2 max7394 v cc2 2.4v to 3.6v 6 2 3 enable gnd i.c. v cc 1 c clock 5 osc1 osc2 4 MAX7393/max7394 precision silicon oscillators with enable or autoenable typical application circuits ordering information downloaded from: http:///
v cc , v cc2 to gnd ............................................... -0.3v to +4.0v clock, clkin, enable, i.c. to gnd .. .-0.3v to (v cc + 0.3v) clock output current .................................................... 50ma continuous power dissipation (t a = +70c) 6-pin dfn (derate 4.5mw/c over +70c) ............... 358mw 6-pin tdfn (derate 18.2mw/c over +70c) .......... 1455mw operating temperature range ......................... -40c to +125c junction temperature ...................................................... +150c storage temperature range ............................ -65c to +150c lead temperature (soldering, 10s) ................................. +300c (v cc = v cc2 = +2.4v to +3.6v, c l = 10pf, t a = -40c to +125c, unless otherwise noted. typical values are at v cc = v cc2 = +3.3v, t a = +25c, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units dc characteristics operating supply voltage v cc 2.4 3.6 v operating output supply voltage v cc2 2.4 3.6 v total operating supply current (note 2) i tot 922khz, max739_ _ _ _ly 4.4 ma 4mhz, max739_ _ _ _rd 5.4 8mhz, max739_ _ _ _tp 5.8 16mhz, max739_ _ _ _wb 6.5 32mhz, max7394_ _ _ yn 9.2 33mhz, max7394_ _ _ yq 9.5 48mhz, max7394_ _ _ zy 12 total shutdown supply current i shdn oscillator disabled, clkin = high (MAX7393), enable = low (max7394) (note 2) 1 2 a logic inputs (enable, clkin) logic input high voltage v ih 0.7 x v cc2 v logic input low voltage v il 0.3 x v cc2 v clock output output high voltage v oh v cc2 2.4v, i source = 5ma v cc2 - 0.3 v output low voltage v ol v cc2 2.4v, i sink = 5ma 0.3 v output rise time t r (note 3) 5 ns output fall time t f (note 3) 5 ns duty cycle (note 3) 47 % startup time time for output to stabilize 2 ms output jitter (note 3) peak-to-peak jitter, 16mhz (max7394) 180 ps peak-to-peak jitter, 48mhz (max7394) 140 MAX7393/max7394 precision silicon oscillators with enable or autoenable 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. electrical characteristics downloaded from: http:///
(v cc = v cc2 = +2.4v to +3.6v, c l = 10pf, t a = -40c to +125c, unless otherwise noted. typical values are at v cc = v cc2 = +3.3v, t a = +25c, unless otherwise noted.) (note 1) note 1: all parameters are production tested at t a = +25c. specifications over temperature are guaranteed by design and characterization. note 2: the total supply current is the sum of i cc and i cc2 . note 3: guaranteed by design and characterization. not production tested. note 4: output frequency is production tested at t a = +25c and t a = +85c. note 5: output frequency is production tested at t a = +25c. parameter symbol conditions min typ max units frequency accuracy clock frequency coeficient of temperature v cc = v cc2 = 3.3v t a = 0c to +70c 20 ppm/c t a = -40c to +125c 50 clock frequency coeficient of supply voltage t a = +25c 0.1 0.15 %/v total accuracy v cc = v cc2 = 3.3v t a = 0c to +85c, v cc = 10% tdfn (note 4) 0.25 % dfn (note 5) 1.3 t a = -40c to +125c, v cc = 10% tdfn (note 4) 1.0 dfn (note 5) 1.8 MAX7393/max7394 precision silicon oscillators with enable or autoenable www.maximintegrated.com maxim integrated 3 electrical characteristics (continued) downloaded from: http:///
(v cc = v cc2 = 3.3v, t a = +25c, max7394, 48mhz output, unless otherwise noted.) duty cycle vs. supply voltage supply voltage (v) duty cycle (%) MAX7393/4 toc01 2.4 2.6 2.8 3.0 3.2 3.4 3.6 40 42 44 46 48 50 52 54 56 58 60 total supply current vs. temperature temperature (c) total supply current (ma) MAX7393/4 toc03 -40 -25 -10 5 20 35 50 65 80 95 110 125 0 1 2 3 4 5 6 7 8 9 10 v cc = v cc2 = +3.6v v cc = v cc2 = +2.4v v cc = v cc2 = +3.3v total supply current vs. supply voltage supply voltage (v) total supply current (ma) MAX7393 toc04 2.4 2.6 2.8 3.0 3.2 3.4 3.6 0 2 4 6 8 10 normalized frequency vs. supply voltage supply voltage (v) MAX7393/4 toc05 2.4 2.6 2.8 3.0 3.2 3.4 3.6 0.995 0.996 0.997 0.998 0.999 1.000 normalized frequency normalized frequency vs. temperature temperature (c) normalized frequency MAX7393/4 toc06 -40 -25 -10 5 20 35 50 65 80 95 110 125 0.990 1.0000.998 0.996 0.994 0.992 1.002 total supply current vs. frequency frequency (mhz) total supply current (ma) MAX7393 toc07 0 6 12 18 24 30 36 42 48 0 1 2 3 4 5 6 7 8 9 v cc = v cc2 = +2.4v v cc = v cc2 = +3.3v v cc = v cc2 = +3.6v MAX7393 settling time from start MAX7393 toc08 clock2v/div on/off2v/div (see figure 1) 20mhz 400s/div duty cycle vs. temperature temperature (c) duty cycle (%) MAX7393/4 toc01 -40 -25 -10 5 20 35 50 65 80 95 110 125 40 42 44 46 48 50 52 54 56 58 60 MAX7393/max7394 precision silicon oscillators with enable or autoenable maxim integrated 4 www.maximintegrated.com typical operating characteristics downloaded from: http:///
(v cc = v cc2 = 3.3v, t a = +25c, max7394, 48mhz output, unless otherwise noted.) pin name function MAX7393 max7394 1 1 v cc positive supply voltage input. bypass v cc to gnd with 0.1f capacitors placed as close to the device as possible. connect v cc to v cc2 . 2 2 gnd ground 3 3 i.c. internally connected. connect i.c. to gnd. do not connect i.c. to any other input or output. do not leave i.c. unconnected. 4 clkin clock input. connect clkin to a returned clock signal source (see the autoenable ( clkin, MAX7393 ) section). 5 5 clock clock output. clock is a rail-to-rail, push-pull output. 6 6 v cc2 positive supply voltage input for output driver. bypass v cc2 to gnd with a 0.1f capacitor placed as close to the device as possible. connect v cc2 to v cc . 4 enable enable input. drive enable low to place the max7394 in shutdown mode. drive enable high for normal operation. ep exposed pad (tdfn version only). connect ep to ground. do not connect ep to any other input or output. max7394 settling time from start MAX7393 toc09 clock2v/div enable2v/div 400s/div clock output waveform with c l = 10pf MAX7393 toc10 clock1v/div 10ns/div MAX7393/max7394 precision silicon oscillators with enable or autoenable maxim integrated 5 www.maximintegrated.com typical operating characteristics (continued) pin description downloaded from: http:///
detailed description the MAX7393/max7394 precision silicon oscillators replace crystals, ceramic resonators, and crystal oscilla - tor modules in systems with a +2.4v to +3.6v operating supply voltage range. the MAX7393/max7394 con - sist of a temperature-compensated precision oscillator with enable (max7394) or autoenable (MAX7393). the enable input on the max7394 manually enables or disables the oscillator. the clkin input on the MAX7393 monitors a returned clock signal to automatically enable or disable the MAX7393 oscillator. the MAX7393/max7394 are supplied at specific frequen - cies, like crystals and resonators. a variety of popular standard frequencies are available (see the selector guide ). output frequency accuracy is guaranteed to be within 0.25% (tdfn) and 1.3% (dfn) (0c to +85c) and 1.0% (tdfn) and 1.8% (dfn) over the -40c to +125c temperature range. no external components are required to generate the specific frequency. enable (max7394) the enable input on the max7394 turns the oscillator on and off. drive enable to a logic-high for normal oper - ation. drive enable to a logic-low to place the device in shutdown mode. during shutdown, the oscillator is turned off, and the clock output is weakly driven high with an internal 10k to v cc2 . in shutdown mode, the total sup - ply current reduces to less than 2a. autoenable (clkin, MAX7393) the MAX7393 features a clkin input that automatically enables or disables the oscillator by sensing the condition of a returned clock signal. the MAX7393 is automatically enabled whenever an active inversion function is sensed between clock and clkin. when no inversion function is detected, the MAX7393 automatically enters shutdown mode. during shutdown, the oscillator is turned off, the clkin input is weakly driven to its last state, and the clock output is weakly driven to the logic-level in clkin. the clkin input relies on an external inversion function, typically provided by a microcontrollers clock generator, to provide an inverted version of the clock output sig - nal. the MAX7393 interprets high/low voltage or a con - stant high-impedance node on clkin as a disable signal. figure 1 shows a test circuit to enable or disable the MAX7393. one input of the nand gate connects to the clock output of the MAX7393, and the other input is driven with a logic level. a logic-high level enables the oscillator and a logic-low level disables the oscillator. see the typical operating characteristics for typical startup performance of the max739 3. oscillator (clock) the clock output is a push-pull, cmos logic output that is capable of driving a ground-connected 1k load or a positive supply connected 500 load to within 300mv of either supply rail. there are no impedancematching issues when using the MAX7393/max7394 clock out - put. a typical startup characteristic is shown in the typical operating characteristics . output jitter the MAX7393/max7394s jitter performance is given in the electrical characteristics table as a peak-to-peak value. applications information interfacing to a microcontroller clock input the MAX7393/max7394 clock output is a push-pull, cmos logic output that directly drives any microproces - sor (p) or microcontroller (c) clock input. there are no impedance-matching issues when using the MAX7393/ max7394. operate the MAX7393/max7394 and micro - controller from the same supply voltage level of v cc2 (see the power-supply considerations section for more details). refer to the microcontrollers data sheet for clock input compatibility with external clock signals. the MAX7393/max7394 require no biasing components or load capacitance. when using the MAX7393/max7394 to retrofit a crystal oscillator, remove all biasing compo - nents from the oscillator input.power-supply considerations the MAX7393/max7394 operate with power-supply volt - ages in the +2.4v to +3.6v range. connect v cc and v cc2 to the same supply voltage level as the device receiving the clock. proper power-supply decoupling is required to maintain the power-supply rejection performance of the MAX7393/max7394. connect 0.1f surface-mount ceram - ic capacitors from v cc to v cc2 to gnd. position these bypass capacitors as close to v cc and v cc2 as possible. a larger v cc2 bypass capacitor value is recommended if the MAX7393/max7394 are to operate with a large capacitive load. use a bypass capacitor value on v cc2 at least 1000 times that of the output load capacitance. figure 1. test circuit to enable or disable the MAX7393 oscillator MAX7393 clock clkin on/off MAX7393/max7394 precision silicon oscillators with enable or autoenable www.maximintegrated.com maxim integrated 6 downloaded from: http:///
selector guide part frequency package top mark MAX7393attly 922khz 6 tdfn +anp MAX7393altly 922khz 6 dfn +abo MAX7393attmg 1mhz 6 tdfn +anq MAX7393altmg 1mhz 6 dfn +abp MAX7393attrd 4mhz 6 tdfn +anr MAX7393altrd 4mhz 6 dfn +abq MAX7393atttp 8mhz 6 tdfn +ans MAX7393alttp 8mhz 6 dfn +abr MAX7393attwb 16mhz 6 tdfn +amn MAX7393altwb 16mhz 6 dfn +aar MAX7393attwv 20mhz 6 tdfn +amo MAX7393altwv 20mhz 6 dfn +aas max7394attly 922khz 6 tdfn +anv max7394altly 922khz 6 dfn +abu max7394attmg 1mhz 6 tdfn +anw max7394altmg 1mhz 6 dfn +abv max7394attrd 4mhz 6 tdfn +anx max7394altrd 4mhz 6 dfn +abw max7394atttp 8mhz 6 tdfn +any max7394alttp 8mhz 6 dfn +abx max7394attwb 16mhz 6 tdfn +amu max7394altwb 16mhz 6 dfn +aay max7394attwv 20mhz 6 tdfn +amv max7394altwv 20mhz 6 dfn +aaz max7394attyn 32mhz 6 tdfn +anz max7394altyn 32mhz 6 dfn +aby max7394attyq 33mhz 6 tdfn +amx max7394altyq 33mhz 6 dfn +abb max7394attzh 40mhz 6 tdfn +aoa max7394altzh 40mhz 6 dfn +abz max7394attzy 48mhz 6 tdfn +amz max7394altzy 48mhz 6 fdfn +abd 1 2 3 6 *ep *exposed pad. connect ep to ground. 5 4 v cc2 clock clkin v cc gnd i.c. MAX7393 tdfn top view of bottom leads + 1 2 3 6 *ep *exposed pad. connect ep to ground. 5 4 v cc2 clock enable v cc gnd i.c. max7394 tdfn + 1 2 3 4 5 6 v cc2 clock enable v cc gnd i.c. max7394 dfn + 1 2 3 4 5 6 v cc2 clock clkin v cc gnd i.c. MAX7393 dfn + MAX7393/max7394 precision silicon oscillators with enable or autoenable www.maximintegrated.com maxim integrated 7 pin conigurations downloaded from: http:///
package type package code outline no. land pattern no. 6 dfn l622-1 21-0164 90-0004 6 tdfn t633+2 21-0137 90-0058 MAX7393/max7394 precision silicon oscillators with enable or autoenable www.maximintegrated.com maxim integrated 8 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. chip information process: bicmos downloaded from: http:///
revision number revision date description pages changed 0 5/06 initial release 1 4/14 no /v opns; removed automotive reference from applications section 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. MAX7393/max7394 precision silicon oscillators with enable or autoenable ? 2014 maxim integrated products, inc. 9 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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