LTC6991CDCB#TRMPBF

LTC6991 TimerBlox: Resettable, Low Frequency Oscillator FEATURES DESCRIPTION n Period Range: 1ms to 9.5 Hours The LTC 6991 is a silicon oscillator with a programmable n Configured with 1 to 3 Resistors period range of 1.024ms to 9.54 hours (29.1Hz to 977Hz), n <1.5% Maximum Frequency Error specifically intended for long duration timing events. The n Output Reset Function LTC6991 is part of the TimerBlox family of versatile silicon n 2.25V to 5.5V Single Supply Operation timing devices. n 55A to 80A Supply Current A single resistor, R , programs the LTC6991s internal SET (2ms to 9.5hr Clock Period) master oscillator frequency. The output clock period n 500s Start-Up Time is determined by this master oscillator and an internal n CMOS Output Driver Sources/Sinks 20mA frequency divider, N , programmable to eight settings DIV n 55C to 125C Operating Temperature Range 21 from 1 to 2 . n Available in Low Profile (1mm) SOT-23 (ThinSOT ) N R and 2mm 3mm DFN Packages DIV SET 21 t = 1.024ms, N = 1,8,64,...,2 OUT DIV 50k APPLICATIONS In normal operation, the LTC6991 oscillates with a 50% n Heartbeat Timers duty cycle. A reset function is provided to truncate the n Watchdog Timers pulse (reducing the duty cycle). The reset pin can also be n Intervalometers used to prevent the output from oscillating. n Periodic Wake-Up Call The RST and OUT pins can be configured for active-low n High Vibration, High Acceleration Environments or active-high operation using a polarity function. n Portable and Battery-Powered Equipment L, LT, LTC, LTM, Linear Technology, TimerBlox and the Linear logo are registered trademarks POL BIT RST PIN OUTPUT STATE and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the 0 0 Oscillating property of their respective owners. 0 1 0 (reset) 1 0 1 (reset) 1 1 Oscillating For easy configuration of the LTC6991, download the TimerBlox Designer tool at www.linear.com/timerblox. Clock Period Range over Eight Divider Settings TYPICAL APPLICATION 10Hr Low Frequency Pulse Generator 1Hr 1s PULSE WIDTH 10Min OUT 60 SECONDS R PW 1Min 2.26k 10Sec RST OUT 6991 TA01a C PW LTC6991 5V 1Sec 470pF + GND V 100ms R1 0.1F R SET 1M 715k 10ms SET DIV R2 1ms 392k 1.25 0 0.625 1.875 2.5 t R t 1s DIV PIN VOLTAGE, V (V) 6991 TA01b PULSE PW PW DIV 6991fb 1 CLOCK PERIOD (LOG SCALE)LTC6991 ABSOLUTE MAXIMUM RATINGS (Note 1) + Supply Voltage (V ) to GND ........................................6V Specified Temperature Range (Note 3) Maximum Voltage LTC6991C ................................................ 0C to 70C + on Any Pin ................ (GND 0.3V) V (V + 0.3V) LTC6991I .............................................40C to 85C PIN Operating Temperature Range (Note 2) LTC6991H .......................................... 40C to 125C LTC6991C ............................................40C to 85C LTC6991MP ....................................... 55C to 125C LTC6991I .............................................40C to 85C Junction Temperature ........................................... 150C LTC6991H .......................................... 40C to 125C Storage Temperature Range .................. 65C to 150C LTC6991MP ....................................... 55C to 125C Lead Temperature (Soldering, 10 sec) S6 Package ...........................................................300C PIN CONFIGURATION TOP VIEW TOP VIEW + V 1 6 OUT RST 1 6 OUT 7 DIV 2 5 GND + GND 2 5 V SET 4 RST 3 SET 3 4 DIV DCB PACKAGE S6 PACKAGE 6-LEAD (2mm s 3mm) PLASTIC DFN 6-LEAD PLASTIC TSOT-23 T = 150C, = 192C/W, = 51C/W T = 150C, = 64C/W, = 10.6C/W JMAX JA JC JMAX JA JC EXPOSED PAD (PIN 7) CONNECTED TO GND, PCB CONNECTION OPTIONAL ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC6991CDCB TRMPBF LTC6991CDCB TRPBF LDWZ 6-Lead (2mm 3mm) Plastic DFN 0C to 70C LTC6991IDCB TRMPBF LTC6991IDCB TRPBF LDWZ 6-Lead (2mm 3mm) Plastic DFN 40C to 85C LTC6991HDCB TRMPBF LTC6991HDCB TRPBF LDWZ 6-Lead (2mm 3mm) Plastic DFN 40C to 125C LTC6991CS6 TRMPBF LTC6991CS6 TRPBF LTDWY 6-Lead Plastic TSOT-23 0C to 70C LTC6991IS6 TRMPBF LTC6991IS6 TRPBF LTDWY 6-Lead Plastic TSOT-23 40C to 85C LTC6991HS6 TRMPBF LTC6991HS6 TRPBF LTDWY 6-Lead Plastic TSOT-23 40C to 125C LTC6991MPS6 TRMPBF LTC6991MPS6 TRPBF LTDWY 6-Lead Plastic TSOT-23 55C to 125C TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. For more information on lead free part marking, go to: