DS1302 Trickle-Charge Timekeeping RTC
Trickle-charge timekeeping chip containing a real-time clock/calendar and 31 bytes of static RAM. Communicates with microprocessors via a simple 3-wire SPI-like synchronous serial interface (CE, SCLK, I/O) and operates down to 2.0V.
Aliase:DS1302N, DS1302+, Real Time Clock, RTC IC, Dallas RTC
DIP-8 Top View
8 Pins
Pin-Tabelle8
| Pin | Signal / Name | Typ | Alternative Funktionen |
|---|---|---|---|
| 1 | VCC2 | Power | Primary Power Supply (+2.0V to +5.5V) |
| 2 | X1 | Analog | 32.768 kHz Quartz Crystal Input Terminal (6pF Load) |
| 3 | X2 | Analog | 32.768 kHz Quartz Crystal Output Terminal |
| 4 | GND | Ground | Ground Reference (0V) |
| 5 | CE | Digital | Chip Enable / Reset Input (Active High, initiates 3-wire communication) |
| 6 | I/O | Digital | 3-Wire Synchronous Serial Data Line (Bidirectional) |
| 7 | SCLK | Digital | Serial Clock Input |
| 8 | VCC1 | Power | Backup Battery / Supercapacitor Supply Input (Trickle Charge Enabled) |