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LTC6906 Datasheet(PDF) 1 Page - Analog Devices |
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LTC6906 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 28 page  LTC6995-1/LTC6995-2 Rev. B For more information www.analog.com 1 Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION TimerBlox: Long Timer, Low Frequency Oscillator The LTC®6995 is a silicon oscillator with a programmable periodrangeof1.024msto9.54hours(29.1µHzto977Hz), specifically intended for long duration timing events. The LTC6995 is part of the TimerBlox® family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6995’s internal master oscillator frequency. The output clock period is determined by this master oscillator and an internal frequency divider, NDIV, programmable to eight settings from 1 to 221. tOUT = NDIV •RSET 50kΩ • 1.024ms, NDIV = 1,8,64,...,2 21 When oscillating, the LTC6995 generates a 50% duty cycle square wave output. A reset function is provided to stop the master oscillator and clear internal dividers. Removing reset initiates a full output clock cycle which is useful for programmable power-on reset and watchdog timer applications. The LTC6995 has two versions of reset functionality. The reset input is active high for the LTC6995-1 and active low for the LTC6995-2. The polarity of the output when reset is selectable for both versions. OUTPUT (OSCILLATOR START STATE) RST/RST POLARITY LTC6995-1 LTC6995-2 0 0 Oscillating (Low) 0 (Reset) 1 0 0 (Reset) Oscillating (Low) 0 1 Oscillating (High) 1 (Reset) 1 1 1 (Reset) Oscillating (High) APPLICATIONS n Period Range: 1ms to 9.5 Hours n Timing Reset by Power-On or Reset Input n Configured with 1 to 3 Resistors n <1.5% Maximum Frequency Error n Programmable Output Polarity n 2.25V to 5.5V Single Supply Operation n 55µA to 80µA Supply Current (2ms to 9.5hr Clock Period) n 500µs Start-Up Time n CMOS Output Driver Sources/Sinks 20mA n –55°C to 125°C Operating Temperature Range n Available in Low Profile (1mm) SOT-23 (ThinSOT™) and 2mm × 3mm DFN Packages n AEC-Q100 Qualified for Automotive Applications n Power-On Reset Timer n Long Time One Shot n “Heartbeat” Timers n Watchdog Timers n Periodic “Wake-Up” Call n High Vibration, High Acceleration Environments All registered trademarks and trademarks are the property of their respective owners. Active Low Power-On Reset Timer LTC6995-1 0.1µF OUT 1M 392k 118k RST GND SET OUT V+ DIV V+ V+ 699512 TA01 5 SECONDS 1/2 tOUT TIMER STOPPED POWER-ON RESET (1ms TO 4.8 HOURS) |
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Similar Description - LTC6906 |
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