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Features
- 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
- Click here to start your design with the LTC6991 Online Design Tool!
Typical Application
Description
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. The LTC6991 is part of the TimerBlox® family of versatile silicon timing devices.
A single resistor, RSET , programs the LTC6991’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.
2x3 DFN-6,SOT-23
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC6991CDCB#PBF | DFN | 6 | C | $1.88 | |
| LTC6991CDCB#TRMPBF | DFN | 6 | C | $1.88 | $1.40 |
| LTC6991CDCB#TRPBF | DFN | 6 | C | $1.88 | $1.35 |
| LTC6991CS6#PBF | SOT | 6 | C | $1.88 | |
| LTC6991CS6#TRMPBF | SOT | 6 | C | $1.88 | $1.40 |
| LTC6991CS6#TRPBF | SOT | 6 | C | $1.88 | $1.35 |
| LTC6991HDCB#PBF | DFN | 6 | H | $2.63 | |
| LTC6991HDCB#TRMPBF | DFN | 6 | H | $2.63 | $1.94 |
| LTC6991HDCB#TRPBF | DFN | 6 | H | $2.63 | $1.89 |
| LTC6991HS6#PBF | SOT | 6 | H | $2.16 | |
| LTC6991HS6#TRMPBF | SOT | 6 | H | $2.63 | $1.94 |
| LTC6991HS6#TRPBF | SOT | 6 | H | $2.63 | $1.89 |
| LTC6991IDCB#PBF | DFN | 6 | I | $2.16 | |
| LTC6991IDCB#TRMPBF | DFN | 6 | I | $2.16 | $1.60 |
| LTC6991IDCB#TRPBF | DFN | 6 | I | $2.16 | $1.55 |
| LTC6991IS6#PBF | SOT | 6 | I | $2.16 | |
| LTC6991IS6#TRMPBF | SOT | 6 | I | $2.16 | $1.60 |
| LTC6991IS6#TRPBF | SOT | 6 | I | $2.16 | $1.55 |
| LTC6991MPS6#PBF | SOT | 6 | MP | $5.64 | |
| LTC6991MPS6#TRMPBF | SOT | 6 | MP | $5.64 | $4.10 |
| LTC6991MPS6#TRPBF | SOT | 6 | MP | $5.64 | $4.05 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1562B-B | LTC6991 Demo Board | 1Hz (1s) Fixed Frequency | $25.00 |