Linear Technology LTC6991
The LTC6991 is part of the TimerBlox™ family of versatile silicon timing devices. The output clock period is determined by this master oscillator and an internal frequency divider, NDIV , programmable to eight settings from 1 to 221. A single resistor, RSET , programs the LTC6991’s internal master oscillator frequency.| Part No. | LTC6991 |
|---|---|
| Datasheet | LTC6991 Download |
| Manufacturer |  Linear Technology |
| Description | Resettable Low Frequency Oscillator |
| Buy | Stock & Price |
ELECTRICAL SPECIFICATIONS
Subject to Change LTC6991 TimerBlox: Resettable Low Frequency OscillatorFEATURES
n n n n n n n n n nDESCRIPTION
The LTC®6991 is a silicon oscillator with a programmable period range of 1.024ms to 9.54 hours (29.1µHz to 977Hz), specifically intended for long duration timing events. tOUT = NDIV● RSET
● 1.024ms, NDIV = 18 , , 64,..., 221 50kΩ Period Range: 1ms to 9.5 Hours Configured with 1 to 3 Resistors <1.5% Maximum Frequency Error Output Reset Function 2.25V to 5.5V Single Supply Operation 55µA to 80µA Supply Current (2ms to 9.5hr Clock Period) 500µs Start-Up Time CMOS Output Driver Sources/Sinks 20mA –40°C to 125°C Operating Temperature Range Available in Low Profile (1mm) SOT-23 (ThinSOT™) and 2mm × 3mm DFN Packages
APPLICATIONS
n n n n n n “Heartbeat” Timers Watchdog Timers Intervalometers Periodic “Wake-Up” Call High Vibration, High Acceleration Environments Portable and Battery-Powered Equipment In normal operation, the LTC6991 oscillates with a 50% duty cycle.
