LTC6991

PRODUCTION

TimerBlox: Resettable, Low Frequency Oscillator

Data Sheet (Rev. D) Product Selection Table

Part Models: 18
1ku List Price: Starting From $1.72

Viewing:

Part Details

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
–55°C to 125°C Operating Temperature Range
Available in Low Profile (1mm) SOT-23 (ThinSOT^™) and 2mm × 3mm DFN Packages
AEC-Q100 Qualified for Automotive Applications

The LTC6991 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. The LTC6991 is part of the TimerBlox^® family of versatile silicon timing devices.

A single resistor, R_SET, programs the LTC6991’s internal master oscillator frequency. The output clock period is determined by this master oscillator and an internal frequency divider, N_DIV, programmable to eight settings from 1 to 2²¹.

In normal operation, the LTC6991 oscillates with a 50% duty cycle. A reset function is provided to truncate the pulse (reducing the duty cycle). The reset pin can also be used to prevent the output from oscillating.

The RST and OUT pins can be configured for active-low or active-high operation using a polarity function.


POL Bit	RST Pin	Output State
0	0	Oscillating
0	1	0 (reset)
1	0	1 (reset)
1	1	Oscillating

Applications

“Heartbeat” Timers
Watchdog Timers
Intervalometers
Periodic “Wake-Up” Call
High Vibration, High Acceleration Environments
Portable and Battery-Powered Equipment

Part Models: 18
1ku List Price: Starting From $1.72

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC6991CDCB#TRMPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991CDCB#TRPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991CS6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991CS6#TRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991HDCB#TRMPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991HDCB#TRPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991HS6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991HS6#TRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991HS6#WTRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991HS6#WTRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991IDCB#TRMPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991IDCB#TRPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991IS6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991IS6#TRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991IS6#WTRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991IS6#WTRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991MPS6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6991MPS6#TRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN
No Match Found
Jun 30, 2020 - 20_0244 Notification of Wafer Fab Location Change for 0.6µm CMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)
		PCN20_0244_Form Material_Report Delta Qualification Matrix Qualification Results Summary Other
LTC6991CDCB#TRMPBF	PRODUCTION
LTC6991CDCB#TRPBF	PRODUCTION
LTC6991CS6#TRMPBF	PRODUCTION
LTC6991CS6#TRPBF	PRODUCTION
LTC6991HDCB#TRMPBF	PRODUCTION
LTC6991HDCB#TRPBF	PRODUCTION
LTC6991HS6#TRMPBF	PRODUCTION
LTC6991HS6#TRPBF	PRODUCTION
LTC6991HS6#WTRMPBF
LTC6991HS6#WTRPBF
LTC6991IDCB#TRMPBF	PRODUCTION
LTC6991IDCB#TRPBF	PRODUCTION
LTC6991IS6#TRMPBF	PRODUCTION
LTC6991IS6#TRPBF	PRODUCTION
LTC6991IS6#WTRMPBF
LTC6991IS6#WTRPBF
LTC6991MPS6#TRMPBF	PRODUCTION
LTC6991MPS6#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Analog Temperature Sensors 1
LTC2997	PRODUCTION	Remote/Internal Temperature Sensor

Tools & Simulations

LTspice 4

Models for the following parts are available in LTspice:

LTC6991

LTC6991: Low Frequency Oscillator

Open Tool

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LTC6991 Demo Board | 1Hz (1s) Fixed Frequency

Buy Now View Details

Product Details

Demonstration circuit 1562B is an engineering tool to design and evaluate the LTC699X-X family of TimerBlox^® circuits. The center section of the board contains a preconfigured TimerBlox function. DC1562B comes in twelve timing function variations as outlined in Table 1.