RTC IC With 114x8 NVSRAM And NVSRAM Control, Alarm Wake-up 3V Op On L Version

The CMOS BQ4285E L is Enhanced RTC With NVRAM Control,a low-power Microprocessor peripheral providing a time-of-day Clock and 100-year calendar with alarm features and battery operation. Other features include three maskable interrupt sources, square wave output, and 114 bytes of general nonvolatile storage.
A 32.768kHz output is available for sustaining power-management activities. Wake-up capability is provided by an alarm interrupt, which is active in battery-backup mode.
The BQ4285E L write-protects the Clock calendar, and storage Registers during power failure. A backup battery then maintains data and operates the Clock and calendar.
The BQ4285E L is a fully compatible Real-Time Clock for IBM AT-compatible computers and other applications. The only external components are a 32.768kHz crystal and a backup battery.
The BQ4285E L integrates a battery-backup controller to make a standard CMOS SRAM nonvolatile during power-fail conditions. During power-fail, the BQ4285E L automatically write-protects the external SRAM and provides a VCC output sourced from the Clock backup battery.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
BQ4285EP Texas Instruments RTC IC With 114x8 NVSRAM and NVSRAM Control, Alarm Wake-up 3V Op on L Version 24-PDIP 0 to 70
BQ4285E 's PackagesBQ4285E 's pdf datasheet

BQ4285E Pinout, Pinouts
BQ4285E pinout,Pin out
This is one package pinout of BQ4285E,If you need more pinouts please download BQ4285E's pdf datasheet.

BQ4285E Application circuits
BQ4285E circuits
This is one application circuit of BQ4285E,If you need more circuits,please download BQ4285E's pdf datasheet.

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