LTC6905 17MHz to 170MHz Resistor Set SOT-23 Oscillator FEATURES DESCRIPTION n One External Resistor Sets the Frequency The LTC 6905 precision, programmable silicon oscilla- n Fast Start-Up Time: 100s Typical tor is easy to use and occupies very little board space. It n Frequency Range: 17MHz to 170MHz requires only a single resistor to set the output frequency n Frequency Error 0.5% Typ 17MHz to 170MHz from 17MHz to 170MHz with a typical frequency error of (T = 0C to 70C, Over All Settings) 0.5% or less. A n 20ppm/C Temperature Stability The LTC6905 operates with a single 2.7V to 5.5V power n Rise Time: 0.5ns, C = 5pF L supply and provides a rail-to-rail, 50% duty cycle square n Timing Jitter: 7.2ps RMS at 170MHz wave output. The CMOS output driver ensures fast rise/fall n 50% 2.5% Duty Cycle times and rail-to-rail switching. Operation is simple: A n 6mA Typical Supply Current, f = 100MHz OSC single resistor, R , between 10k to 25k is used to set SET n CMOS Output Drives 500 Load (V = 3V) S the frequency, and an internal three-state divider (DIV n Operates from a Single 2.7V to 5.5V Supply input) allows for division of the master clock by 1, 2 or 4, n Low Pro le (1mm) ThinSOT Package providing three frequencies for each R value. SET The LTC6905 features a proprietary feedback loop that APPLICATIONS linearizes the relationship between R and frequency, SET eliminating the need for tables to calculate frequency. The n High Frequency Precision Oscillator oscillator can be easily programmed using the simple n High Speed Data Bus Clock formula outlined below: n Fixed Crystal Oscillator Replacement n + Ceramic Oscillator Replacement 1, DIVPin =V 168.5MHz 10k 1 L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. f = +15.MHz, N = 2,DIVPin =Open OSC ThinSOT is a trademark of Linear Technology Corporation. R N SET All other trademarks are the property of their respective owners. 4,DIVPin =GND Protected by U.S. Patents including 6614313, 6342817. For higher accuracy, xed frequency versions that include an internal frequency-setting resistor, see the LTC6905-XXX Series data sheet. TYPICAL APPLICATION Typcial Distribution of Frequency Error, T = 25C A 60 + V = 3V R = 12k SET 50 DIV = 1 Basic Connection 40 17.225MHz f 170MHz OSC 5V 1 5 30 + V OUT 0.1F LTC6905 2 5V 10k R 25k 20 SET GND 1 3 4 2 SET DIV OPEN 10 4 6905 TA01 0 0.5 0.3 0.1 0.1 0.3 0.5 % ERROR 6905 TA02 NOTE: RESISTOR, R , TOLERANCE WILL ADD SET TO THE FREQUENCY ERROR 6905fd 1 UNITSLTC6905 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) + TOP VIEW Supply Voltage (V ) to GND .........................0.3V to 6V + + DIV to GND .................................... 0.3V to (V + 0.3V) V 1 5 OUT + SET to GND .................................... 0.3V to (V + 0.3V) GND 2 SET 3 4 DIV Output Short-Circuit Duration (Note 6) ........... Inde nite Operating Temperature Range (Note 7) S5 PACKAGE 5-LEAD PLASTIC SOT-23 LTC6905C, I .........................................40C to 85C T = 125C, = 160C/W JMAX JA LTC6905H ..........................................40C to 125C LTC6905MP .......................................55C to 125C Speci ed Temperature Range (Note 8) LTC6905C ................................................ 0C to 70C LTC6905I..............................................40C to 85C LTC6905H ..........................................40C to 125C LTC6905MP .......................................55C to 125C Storage Temperature Range ...................65C to 150C Lead Temperature (Soldering, 10 sec) .................. 300C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6905CS5 TRMPBF LTC6905CS5 TRPBF LTBJC 5-Lead Plastic SOT-23 0C to 70C LTC6905IS5 TRMPBF LTC6905IS5 TRPBF LTBJC 5-Lead Plastic SOT-23 40C to 85C LTC6905HS5 TRMPBF LTC6905HS5 TRPBF LTBJC 5-Lead Plastic SOT-23 40C to 125C LTC6905MPS5 TRMPBF LTC6905MPS5 TRPBF LTDVW 5-Lead Plastic SOT-23 55C to 125C LEAD BASED FINISH TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6905MPS5 TRM LTC6905MPS5 TR LTDVW 5-Lead Plastic SOT-23 55C to 125C TRM = 500 pieces. *The temperature grade is identi ed by a label on the shipping container. Consult LTC Marketing for information on lead based nish parts. For more information on lead free part marking, go to: