| BQ4285EP Description | | RTC IC With 114x8 NVSRAM and NVSRAM Control, Alarm Wake-up 3V Op on L Version | | BQ4285EP Vendor | | Texas Instruments | | BQ4285EP Features | - Direct clock/calendar replacement for IBM® AT-compatible computers and other applications
- 114 bytes of general nonvolatile storage
- Enhanced features include:
- System wake-up capability—alarm interrupt output active in battery-backup mode
- 2.7-3.6V operation (bq4285L); 4.5-5.5V operation (bq4285E)
- 2kHz output for power management
- Automatic backup and write-protect control to external SRAM
- Functionally compatible with the DS1285
- Less than 0.5µA load under battery operation
- 14 bytes for clock/calendar and control
- BCD or binary format for clock and calendar data
- Calendar in day of the week, day of the month, months, and years, with automatic leap-year adjustment
- Time of day in seconds, minutes, and hours
- 12- or 24-hour format
- Optional daylight saving adjustment
- Programmable square wave out-put
- Three individually maskable interrupt event flags:
- Periodic rates from 122us to 500ms
- Time-of-day alarm once per second to once per day
- End-of-clock update cycle
- 24-pin plastic DIP or SOIC
| | BQ4285EP Datasheet and Application Notes | | | Parameter | Value | | Supply Voltage (V) | 5 | | Bus Interface | Multiplexed | | Memory Density (Kb) | 0.114 | | Pin/Package | 24PDIP | | Approx. 1KU Price (US$) | 2.35 | | Status | ACTIVE | | Temp (oC) | 0 to 70 | | Budget Price ($US) | QTY | 2.35 | 1KU | | Package Type | Pins | PDIP (N) | 24 | | STD Pack QTY | 15 | | Products related to BQ4285EP | | BQ4285E |
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