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Product Detailed Parameters
- Description：RTC ARTASIE SPI W/PWR MNGT 16QFN
- Series：Artasie
- Package：Tape & Reel (TR),Cut Tape (CT)
- Mfr：Ambiq Micro, Inc.
- Type：Clock/Calendar
- Features：Alarm, Leap Year, RAM, Square Wave Output, Supervisor, Trickle Charger, Unique ID, Watchdog Timer
- Memory Size：256B
- Time Format：HH:MM:SS:hh (12/24 hr)
- Date Format：YY-MM-DD-dd
- Interface：SPI
- Voltage - Supply：1.5V ~ 3.6V
- Voltage - Supply, Battery：1.4V ~ 3.6V
- Current - Timekeeping (Max)：0.17µA ~ 0.22µA @ 1.8V ~ 3V
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Package / Case：16-VFQFN Exposed Pad
- Supplier Device Package：16-QFN (3x3)
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Overview
The Ambiq Micro AM1815AQ is a Real-Time Clock (RTC) and Calendar IC from the Artasie family, designed for ultra-low power applications. It features an SPI interface, supports 12/24-hour time formats, and includes leap year compensation. The device operates on a main supply of 1.5V to 3.6V and a battery backup of 1.4V to 3.6V. Timekeeping current consumption ranges from 0.17µA to 0.22µA at 1.8V to 3V. It integrates 256 bytes of RAM, a watchdog timer, alarm functions, and a trickle charger. The component is housed in a 16-VFQFN exposed pad package.
Feature Summary
- Ultra-low power RTC with timekeeping current as low as 0.17µA @ 1.8V
- Integrated 256-byte RAM and Unique ID registers
- Supports SPI interface with Alarm, Leap Year, and Square Wave Output
- Includes Watchdog Timer, Supervisor, and Trickle Charger capabilities
Applications
- Battery-powered IoT devices requiring precise timekeeping
- Wearable electronics with strict power constraints
- Industrial equipment needing watchdog and reset management
- Portable consumer electronics utilizing SPI communication
Procurement Notes
Verify the specific ordering suffix against the manufacturer's official datasheet to confirm package type and reel specifications. Ensure compatibility with the required voltage levels and interface protocols before procurement. Check for any recent revisions or obsolescence notices directly from Ambiq Micro or authorized distributors.
Selection Notes
Select this model when SPI connectivity is preferred over I2C for RTC functionality. Consider the 16-QFN package dimensions for PCB layout constraints. Evaluate the 256-byte RAM requirement against application data storage needs. Confirm that the operating temperature range of -40°C to 85°C meets environmental specifications.
Part Context
The AM1815AQ belongs to the Ambiq Micro Artasie AM18X5 family of real-time clocks. This series is characterized by its focus on ultra-low power consumption combined with sophisticated power management features. The AM1815 variant specifically denotes the inclusion of certain memory and interface configurations within the broader Artasie product line.
Replacement Considerations
Consult the official Ambiq Micro documentation for direct cross-references. Verify pinout compatibility and register mapping if substituting with other RTC models. Ensure equivalent power consumption and interface support are maintained in alternative components.
