LTC6905IS5-133 Ver la hoja de datos (PDF) - Linear Technology

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LTC6905IS5-133

Fixed Frequency SOT-23 Oscillator

Linear Technology 

FEATURES

■ No External Components to Set Frequency

■ Frequency Error ±0.5% Typical

■ Fast Start-Up Time: 100µs Typical

■ ±20ppm/°C Temperature Stability

■ Output Enable Provided

■ Includes Divide by 1, 2 or 4

■ Rise Time: 0.5ns, CL = 5pF

■ Timing Jitter: <0.8% Typical

■ 50% ±2.5% Duty Cycle

■ IS = 8mA Typical (fOSC = 100MHz, CL = 5pF)

■ CMOS Output Drives 600Ω Load

■ Single Supply 2.7V to 5.5V

■ Low Profile (1mm) ThinSOTTM Package

U

APPLICATIO S

■ Data Clocks for High Reliability Applications

■ High Vibration, High Acceleration Environments

■ Replacement for Fixed Crystal and Ceramic

Oscillators

, LTC and LT are registered trademarks of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

Protected by U.S. Patents, including 6614313, 6342817.

TYPICAL APPLICATIO

3V

0.1µF

Basic Connection

fOSC = 133MHz

1 V+

5

OUT

LTC6905-133

2

GND

3

OE

4

DIV

3V

÷1

÷2

OPEN

6905x TA01

÷4

LTC6905-XXX Series

Fixed Frequency

SOT-23 Oscillator

DESCRIPTIO

The LTC®6905-XXX series of parts are precision, fixed

frequency, silicon oscillators designed to minimize board

space while maximizing accuracy and ease of use.

Programmed at the factory to a fixed frequency, the

LTC6905-XXX series of parts need no external trim com-

ponents. An internal three-state divider allows for division

of the master clock by 1, 2 or 4, providing 3 frequencies

(for each device).

The LTC6905-XXX series operate with a single 2.7V to

5.5V power supply and provide a rail-to-rail, 50% duty

cycle, square wave output. The OE pin will disable the

output when brought low and synchronously enable the

output when brought high, avoiding pulse slivers.

The four products of the LTC6905-XXX family are:

LTC6905-133: fOSC = 133MHz, 66.7MHz, 33.3MHz

LTC6905-100: fOSC = 100MHz, 50MHz, 25MHz

LTC6905-96: fOSC = 96MHz, 48MHz, 24MHz

LTC6905-80: fOSC = 80MHz, 40MHz, 20MHz

The LTC6905-XXX series of parts are designed with a factory

trim option to modify the divider ratios from 1, 2, 4 to 8, 16,

32. A second trim option allows for additional master clock

frequencies. For the alternate divider ratios and unlisted

frequencies, contact LTC marketing.

Typical Distribution of Frequency Error, TA = 25°C

40

VS = 3V

30

20

10

0

–1

–0.5

0.0

0.5

1

% FREQUENCY ERROR 6905x TA02

6905xf

1

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