Description:The ISL12024 device is a micro-power real-time clock with embedded 64-bit unique ID, timing and crystal compensation, clock/calender, power-fail indicator, two periodic or polled alarms, intelligent battery backup switching, and integrated 512x8-bit EEPROM configured in 16 Bytes per page. The oscillator uses an external, low-cost 32. 768kHz crystal. The real-time clock tracks time with separate registers for hours, minutes, and seconds. The device has calendar registers for date, month, year and day of the
Renesas provides a recommended PCB layout in the application note AN1443, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize noise.
The ISL12024IBZ has a built-in crystal oscillator startup timer that can be programmed to ensure the oscillator is stable before the RTC starts counting. The startup time can be set using the STS register (address 0x01). A typical startup time is around 100ms to 200ms.
The ISL12024IBZ has an operating temperature range of -40°C to +85°C, making it suitable for industrial and automotive applications. However, the device can be operated at temperatures up to +105°C for short periods of time (e.g., during power-up or power-down).
The ISL12024IBZ has a built-in battery switch that allows the device to automatically switch to a backup battery when the main power supply is removed. To implement a battery-backed RTC, connect a battery to the VBAT pin and ensure that the battery voltage is within the recommended range (2.0V to 3.6V). The device will automatically switch to the backup battery when the main power supply is removed.
The typical current consumption of the ISL12024IBZ varies depending on the operating mode. In active mode, the current consumption is around 1.5mA to 2.5mA. In standby mode, the current consumption is around 1.5μA to 3.5μA. In VBAT mode, the current consumption is around 0.5μA to 1.5μA.
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ISL12024IBZ Overview
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