LTC2956

RECOMMENDED FOR NEW DESIGNS

Wake-Up Timer with Pushbutton Control

Part Models: 16
1ku List Price: Starting From $2.40

Viewing:

Overview

1.5V to 36V Supply Input Range
Adjustable Wake-Up Period: 250ms to 39 Days
Adjustable Maximum Awake Time
0.8μA Quiescent Current
0.3μA Shutdown Current
Pushbutton Input with Debouncing
Low Leakage EN Output Allows DC/DC Converter Control (LTC2956-1)
High Voltage EN Output Drives External P-Channel MOSFET (LTC2956-2)
±25kV ESD HBM on PB Input
12-Lead 3mm × 3mm QFN and MSOP Packages

The LTC2956 is a micropower, wide input voltage range, configurable wake-up timer with pushbutton control. It periodically wakes up and turns on a connected system to perform tasks like monitoring temperature or capturing images. After completing the task, the LTC2956 turns the system off to conserve power.

The wake-up timer period can be adjusted from 250ms to 39 days using configuration resistors. The system awake time can be controlled by the input pulse at the SLEEP pin or adjusted by the capacitor at the ONMAX pin. The LTC2956 operates over a wide supply input range from 1.5V to 36V. The low 800nA quiescent current suits battery powered applications.

The pushbutton input allows the user to shutdown, turn on or reset the wake-up timer. With the timer in shutdown, the quiescent current drops to 300nA. The LTC2956 also provides three status outputs to indicate mode transitions and pushbutton events. Two versions are available for applications requiring either positive or negative enable polarities.

Applications

Heartbeat Timers
Periodic Wake-Up Control
Portable and Battery-Powered Equipment
Intervalometers
Data Acquisition

Part Models: 16
1ku List Price: Starting From $2.40

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
LTC2956CMS-1#PBF	12-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956CMS-1#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956CMS-2#PBF	12-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956CMS-2#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956CUD-1#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956CUD-1#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956CUD-2#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956CUD-2#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956IMS-1#PBF	12-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956IMS-1#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956IMS-2#PBF	12-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956IMS-2#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956IUD-1#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956IUD-1#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956IUD-2#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2956IUD-2#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
		PCN24_0004_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC2956CMS-1#PBF	PRODUCTION
LTC2956CMS-1#TRPBF	PRODUCTION
LTC2956CMS-2#PBF	PRODUCTION
LTC2956CMS-2#TRPBF	PRODUCTION
LTC2956IMS-1#PBF	PRODUCTION
LTC2956IMS-1#TRPBF	PRODUCTION
LTC2956IMS-2#PBF	PRODUCTION
LTC2956IMS-2#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0129_Form Material_Report
LTC2956CMS-1#PBF	PRODUCTION
LTC2956CMS-1#TRPBF	PRODUCTION
LTC2956CMS-2#PBF	PRODUCTION
LTC2956CMS-2#TRPBF	PRODUCTION
LTC2956IMS-1#PBF	PRODUCTION
LTC2956IMS-1#TRPBF	PRODUCTION
LTC2956IMS-2#PBF	PRODUCTION
LTC2956IMS-2#TRPBF	PRODUCTION

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

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Oscillators 1
LTC6995		TimerBlox: Long Timer, Low Frequency Oscillator
Protection Switches & Controllers 1
LTC4231	RECOMMENDED FOR NEW DESIGNS	Micropower Hot Swap Controller

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC2956-1
LTC2956-2

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

LTC2956-1 Demo Board | Wake-Up Timer with Pushbutton Control, EN Pin

Buy Now View Details

Product Details

Demonstration circuits 2254A-A and 2254A-B feature the LTC2956-1 and LTC2956-2, respectively. The LTC2956 is a micropower, wide input voltage range, configurable wake-up timer with pushbutton control. It periodically wakes up and turns on a connected system to perform tasks like monitoring temperature or capturing images. After completing the task, the LTC2956 turns the system off to conserve power. The wake-up timer period can be adjusted from 250ms to 39 days.