I2C interface with 56Byte NVRAM RTC
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The PT7C4311 serial real-time clock is a low-power clock/calendar with a programmable square-wave output. Address and data are transferred serially via a 2-wire bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in the 24- hour format indicator.
Table 1 shows the basic functions of PT7C4311. More details are shown in section: overview of functions.
Support I2C-Bus (High speed mode 400kHz)
Includes time (Hour/Minute/Second) and calendar (Century/Year/Month/Date/Day) counter functions
Year 2000 compliant
Automatic switch-over and deselect circuitry
Time keeping voltage: 1.2V to 5.5V
Software clock calibration
56 bytes of general purpose RAM
Ultra-low battery supply current of 0.3μA
Low operating current of 70μA
Battery or super cap back-up
Operating temperature: -40°C to 85°C
Automatic leap year compensation
Special software programmable output
| Alarm Interrupt | 0 |
|---|---|
| Battery Backup | 1 |
| Clock Calibration | 1 |
| Compliance(Only Automotive supports PPAP) | Standard |
| Interface | I2C |
| NV Ram | 56x8 |
| Time Display | 24 |
A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.
| PCN # | Issue Date | Implementation Date | Subject |
|---|---|---|---|
| PCN-2678 | 2024-03-29 | 2024-09-25 | Device End of Life (EOL) |
| PCN-2651 | 2023-11-13 | 2023-11-13 | Qualified Additional Fab Source, Assembly Test Sites, Die Revision, BOM, Datasheet, Tape and Reel Packing Quantity. |
| PCN-2642 | 2023-09-05 | 2024-03-05 | Device End of Life (EOL) |
| PCN-2510 | 2021-02-26 | 2021-05-26 | Qualified Additional A/T Sites, Fab Site and Data Sheet Change |
| PCN-2505 | 2021-01-26 | 2021-07-26 | Device End of Life (EOL) |
