LTC6905 - 17MHz to 170MHz Resistor Set SOT-23 Oscillator

Features

• Click Here For LTC6905 Evaluation Kits
• One External Resistor Sets the Frequency
• Fast Start-Up Time: 100µs Typical
• Frequency Range: 17MHz to 170MHz
• Frequency Error ±0.5% Typ 17MHz to 170MHz
  (T_A = 0°C to 70°C, Over All Settings)
• ±20ppm/°C Temperature Stability
• Rise Time: 0.5ns, C_L = 5pF
• Timing Jitter: 7.2ps RMS at 170MHz
• 50% ±2.5% Duty Cycle
• 6mA Typical Supply Current, f_OSC = 100MHz
• CMOS Output Drives 500Ω Load (VS = 3V)
• Operates from a Single 2.7V to 5.5V Supply
• Low Profile (1mm) ThinSOT Package

Typical Application

Description

The LTC6905 precision, programmable silicon oscillator is easy to use and occupies very little board space. It requires only a single resistor to set the output frequency from 17MHz to 170MHz with a typical frequency error of 0.5% or less.

The LTC6905 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. Operation is simple: A single resistor, R_SET, between 10K to 25K is used to set the frequency, and an internal three-state divider (DIV input) allows for division of the master clock by 1, 2 or 4, providing three frequencies for each R_SET value.

The LTC6905 features a proprietary feedback loop that linearizes the relationship between R_SET and frequency, eliminating the need for tables to calculate frequency. The oscillator can be easily programmed using the simple formula outlined below:

See first page of Data Sheet for formula 

For higher accuracy, fixed frequency versions that include
an internal frequency-setting resistor, see the LTC6905-XXX Series datasheet.

Packaging

SOT-23

Order Info

• Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
• Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
• Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)*	RoHS Data
LTC6905CS5	SOT	5	C	$2.28	$1.65	View
LTC6905CS5#PBF	SOT	5	C	$2.28	$1.65	View
LTC6905CS5#TR	SOT	5	C	$2.28	$1.65	View
LTC6905CS5#TRM	SOT	5	C	$2.28	$1.67	View
LTC6905CS5#TRMPBF	SOT	5	C	$2.28	$1.67	View
LTC6905CS5#TRPBF	SOT	5	C	$2.28	$1.65	View
LTC6905CS5-100	SOT	5	C	$1.71		View
LTC6905CS5-100#PBF	SOT	5	C	$1.71		View
LTC6905CS5-100#TR	SOT	5	C	$1.71	$1.15	View
LTC6905CS5-100#TRM	SOT	5	C	$1.71	$1.17	View
LTC6905CS5-100#TRMPBF	SOT	5	C	$1.71	$1.17	View
LTC6905CS5-100#TRPBF	SOT	5	C	$1.71	$1.15	View
LTC6905CS5-133	SOT	5	C	$1.71	$1.15	View
LTC6905CS5-133#PBF	SOT	5	C	$1.71		View
LTC6905CS5-133#TR	SOT	5	C	$1.71	$1.15	View
LTC6905CS5-133#TRM	SOT	5	C	$1.71	$1.17	View
LTC6905CS5-133#TRMPBF	SOT	5	C	$1.71	$1.17	View
LTC6905CS5-133#TRPBF	SOT	5	C	$1.71	$1.15	View
LTC6905CS5-80	SOT	5	C	$1.71	$1.15	View
LTC6905CS5-80#PBF	SOT	5	C	$1.71		View
LTC6905CS5-80#TR	SOT	5	C	$1.71	$1.15	View
LTC6905CS5-80#TRM	SOT	5	C	$1.71	$1.17	View
LTC6905CS5-80#TRMPBF	SOT	5	C	$1.71	$1.17	View
LTC6905CS5-80#TRPBF	SOT	5	C	$1.71	$1.15	View
LTC6905CS5-96	SOT	5	C	$1.71		View
LTC6905CS5-96#PBF	SOT	5	C	$1.71		View
LTC6905CS5-96#TR	SOT	5	C	$1.71	$1.15	View
LTC6905CS5-96#TRM	SOT	5	C	$1.71	$1.17	View
LTC6905CS5-96#TRMPBF	SOT	5	C	$1.71	$1.17	View
LTC6905CS5-96#TRPBF	SOT	5	C	$1.71	$1.15	View
LTC6905HS5	SOT	5	H	$3.25	$2.38	View
LTC6905HS5#PBF	SOT	5	H	$3.25		View
LTC6905HS5#TR	SOT	5	H	$3.25	$2.44	View
LTC6905HS5#TRM	SOT	5	H	$3.25	$2.46	View
LTC6905HS5#TRMPBF	SOT	5	H	$3.25	$2.46	View
LTC6905HS5#TRPBF	SOT	5	H	$3.25	$2.44	View
LTC6905HS5-100	SOT	5	H	$2.45	$1.67	View
LTC6905HS5-100#PBF	SOT	5	H	$2.45		View
LTC6905HS5-100#TR	SOT	5	H	$2.45	$1.73	View
LTC6905HS5-100#TRM	SOT	5	H	$2.45	$1.75	View
LTC6905HS5-100#TRMPBF	SOT	5	H	$2.45	$1.75	View
LTC6905HS5-100#TRPBF	SOT	5	H	$2.45	$1.73	View
LTC6905HS5-133	SOT	5	H	$2.45	$1.67	View
LTC6905HS5-133#PBF	SOT	5	H	$2.45		View
LTC6905HS5-133#TR	SOT	5	H	$2.45	$1.73	View
LTC6905HS5-133#TRM	SOT	5	H	$2.45	$1.75	View
LTC6905HS5-133#TRMPBF	SOT	5	H	$2.45	$1.75	View
LTC6905HS5-133#TRPBF	SOT	5	H	$2.45	$1.73	View
LTC6905HS5-80	SOT	5	H	$2.45	$1.67	View
LTC6905HS5-80#PBF	SOT	5	H	$2.45		View
LTC6905HS5-80#TR	SOT	5	H	$2.45	$1.73	View
LTC6905HS5-80#TRM	SOT	5	H	$2.45	$1.75	View
LTC6905HS5-80#TRMPBF	SOT	5	H	$2.45	$1.75	View
LTC6905HS5-80#TRPBF	SOT	5	H	$2.45	$1.73	View
LTC6905HS5-96	SOT	5	H	$2.45	$1.67	View
LTC6905HS5-96#PBF	SOT	5	H	$2.45		View
LTC6905HS5-96#TR	SOT	5	H	$2.45	$1.73	View
LTC6905HS5-96#TRM	SOT	5	H	$2.45	$1.75	View
LTC6905HS5-96#TRMPBF	SOT	5	H	$2.45	$1.75	View
LTC6905HS5-96#TRPBF	SOT	5	H	$2.45	$1.73	View
LTC6905IS5	SOT	5	I	$2.71	$1.98	View
LTC6905IS5#PBF	SOT	5	I	$2.71		View
LTC6905IS5#TR	SOT	5	I	$2.71	$2.04	View
LTC6905IS5#TRM	SOT	5	I	$2.71	$2.06	View
LTC6905IS5#TRMPBF	SOT	5	I	$2.71	$2.06	View
LTC6905IS5#TRPBF	SOT	5	I	$2.71	$2.04	View
LTC6905IS5-100	SOT	5	I	$2.04	$1.38	View
LTC6905IS5-100#PBF	SOT	5	I	$2.04		View
LTC6905IS5-100#TR	SOT	5	I	$2.04	$1.44	View
LTC6905IS5-100#TRM	SOT	5	I	$2.04	$1.46	View
LTC6905IS5-100#TRMPBF	SOT	5	I	$2.04	$1.46	View
LTC6905IS5-100#TRPBF	SOT	5	I	$2.04	$1.44	View
LTC6905IS5-133	SOT	5	I	$2.04	$1.38	View
LTC6905IS5-133#PBF	SOT	5	I	$2.04		View
LTC6905IS5-133#TR	SOT	5	I	$2.04	$1.44	View
LTC6905IS5-133#TRM	SOT	5	I	$2.04	$1.46	View
LTC6905IS5-133#TRMPBF	SOT	5	I	$2.04	$1.46	View
LTC6905IS5-133#TRPBF	SOT	5	I	$2.04	$1.44	View
LTC6905IS5-80	SOT	5	I	$2.04	$1.38	View
LTC6905IS5-80#PBF	SOT	5	I	$2.04		View
LTC6905IS5-80#TR	SOT	5	I	$2.04	$1.44	View
LTC6905IS5-80#TRM	SOT	5	I	$2.04	$1.46	View
LTC6905IS5-80#TRMPBF	SOT	5	I	$2.04	$1.46	View
LTC6905IS5-80#TRPBF	SOT	5	I	$2.04	$1.44	View
LTC6905IS5-96	SOT	5	I	$2.04	$1.38	View
LTC6905IS5-96#PBF	SOT	5	I	$2.04		View
LTC6905IS5-96#TR	SOT	5	I	$2.04	$1.44	View
LTC6905IS5-96#TRM	SOT	5	I	$2.04	$1.46	View
LTC6905IS5-96#TRMPBF	SOT	5	I	$2.04	$1.46	View
LTC6905IS5-96#TRPBF	SOT	5	I	$2.04	$1.44	View
LTC6905MPS5#PBF	SOT	5	MP	$7.02		View
LTC6905MPS5#TRMPBF	SOT	5	MP	$7.02	$5.09	View
LTC6905MPS5#TRPBF	SOT	5	MP		$5.04	View
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^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Evaluation Kits

Part Number	Description	Price
DC814A-A	LTC6905 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-B	LTC1799 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-C	LTC6900 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-D	LTC6905-133 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-E	LTC6905-100 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-F	LTC6905-96 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-G	LTC6905-80 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-H	LTC6906 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-I	LTC6907 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-J	LTC6908-1 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-K	LTC6908-2 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814B-A	LTC6905 DIP8 CLOCK BOARD	$25.00
DC814B-B	LTC1799 DIP8 CLOCK BOARD	$25.00
DC814B-C	LTC6900 DIP8 CLOCK BOARD	$25.00
DC814B-D	LTC6905-133 DIP8 CLOCK BOARD	$25.00
DC814B-E	LTC6905-100 DIP8 CLOCK BOARD	$25.00
DC814B-F	LTC6905-96 DIP8 CLOCK BOARD	$25.00
DC814B-G	LTC6905-80 DIP8 CLOCK BOARD	$25.00
DC814C-H	LTC6906 DIP8 CLOCK BOARD	$25.00
DC814C-I	LTC6907 DIP8 CLOCK BOARD	$25.00
DC814D-J	LTC6908-1 DIP8 CLOCK BOARD	$25.00
DC814D-K	LTC6908-2 DIP8 CLOCK BOARD	$25.00
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Applications

• High Frequency Precision Oscillator
• High Speed Data Bus Clock
• Fixed Crystal Oscillator Replacement
• Ceramic Oscillator Replacement

Simulate

OscCalc, an Excel based selection and synthesis tool, allows you to choose and configure the Silicon Oscillator best suited for your application.

• Download and open OscCalc
• Enable Macros
• Enter your desired switching frequency. Suitable silicon oscillators will be highlighted in green. Clicking on a part will show you the external component values and settings required to achieve your desired switching frequency.