MCP7940N Real-Time Clock/Calendar with SRAM
I2C real-time clock/calendar with SRAM and battery backup input. Uses external 32.768 kHz crystal (6-9 pF load). Open-drain SDA and multifunction MFP outputs.
Aliase:MCP7940N-I/SN
SOIC8 Top View
8 Pins
Pinout Table8
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | X1 | Analog | Quartz crystal input / external oscillator input |
| 2 | X2 | Analog | Quartz crystal output |
| 3 | VBAT | Power | Battery backup supply input for RTCC and SRAM |
| 4 | Vss | Ground | Ground |
| 5 | SDA | Digital | Bidirectional serial data (I2C), open-drain |
| 6 | SCL | Digital | Serial clock (I2C) input |
| 7 | MFP | Digital | Multifunction pin: alarm / square wave / general output, open-drain |
| 8 | Vcc | Power | Primary power supply |