RTC IC With 114x8 NVSRAM And NVSRAM Control,Real-Time Clock (RTC) With NVRAM Control

The CMOS BQ4285 is Real-Time Clock (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.
The BQ4285 write-protects the Clock calendar, and b8d storage Registers during power failure. A backup battery then maintains data and operates the Clock and calendar.
The BQ4285 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 BQ4285 integrates a battery-backup controller to make a standard CMOS SRAM nonvolatile during power-fail conditions. During power-fail, the BQ4285 automatically write-protects the external SRAM and provides a VCC output sourced from the Clock backup battery.
By Texas Instruments
BQ4285 's PackagesBQ4285 's pdf datasheet

BQ4285 pdf datasheet download

BQ4285 Pinout, Pinouts
BQ4285 pinout,Pin out
This is one package pinout of BQ4285,If you need more pinouts please download BQ4285's pdf datasheet.

BQ4285 Application circuits
BQ4285 circuits
This is one application circuit of BQ4285,If you need more circuits,please download BQ4285's pdf datasheet.

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