ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR SPI 16QFN
- Series：-
- Package：Tape & Reel (TR),Cut Tape (CT)
- Mfr：Abracon LLC
- Type：Clock/Calendar
- Features：Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer
- Memory Size：256B
- Time Format：HH:MM:SS:hh
- Date Format：YY-MM-DD-dd
- Interface：SPI
- Voltage - Supply：1.7V ~ 3.6V
- Voltage - Supply, Battery：1.5V ~ 3.6V
- Current - Timekeeping (Max)：0.17µA ~ 0.22µA @ 1.8V ~ 3V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Package / Case：16-VFQFN Exposed Pad
- Supplier Device Package：16-QFN (3x3)
Download product information
Overview
The Abracon AB1815-T3 is a Real-Time Clock (RTC) IC featuring an SPI serial interface. It operates within a supply voltage range of 1.7V to 3.6V and supports battery backup from 1.5V to 3.6V. The device provides timekeeping with HH:MM:SS:hh format and YY-MM-DD-dd date format. It includes 256 bytes of general-purpose RAM, alarm capabilities, leap year calculation, and a watchdog timer. Current consumption varies by mode: 0.17µA to 0.22µA during timekeeping at 1.8V–3V. It is housed in a 16-VFQFN Exposed Pad package.
Feature Summary
- SPI Interface: Supports 3-wire or 4-wire SPI communication up to 2 MHz.
- Ultra-low Power Modes: Consumes as low as 14 nA with RC oscillator and 22 nA with autocalibration at 3V.
- Power Management: Includes integrated ~1 Ω power switch, system sleep manager, and supercapacitor trickle charger.
- Advanced Timekeeping: Features automatic leap year calculation, programmable alarms on all counters, and watchdog timer with hardware reset.
Applications
- Smart cards
- Wireless sensors and tags
- Medical electronics
- Utility meters
- Data loggers
Procurement Notes
Verify the specific suffix '-T3' against official documentation to confirm packaging details such as Tape & Reel specifications. Ensure the selected variant matches the required SPI interface configuration, as other family members may utilize I2C. Confirm that the 16-VFQFN exposed pad thermal connection requirements are met in the design.
Selection Notes
Select the AB1815-T3 when an SPI interface is preferred over I2C for host controller compatibility. Consider the ultra-low current consumption modes (RC vs. XT) based on required timing accuracy versus power budget constraints. Ensure the application utilizes the 256-byte RAM for parameter retention if the host processor requires data storage during power-down states.
Part Context
The AB1815 belongs to the AB18X5 Real-Time Clock with Power Management family. It is software and pin compatible with the AB08X5 series but distinguishes itself through the inclusion of advanced power management features like the integrated power switch and sleep FSM, which are absent in the baseline AB08X5 components.
Replacement Considerations
The AB0815 is a software and pin-compatible alternative within the same package. However, it lacks the advanced power management features found in the AB1815, such as the integrated power switch and system sleep manager. Verify interface compatibility if substituting with non-family RTCs.
