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| Part Number | MCP7940N-I/SN | MCP7940NT-I/SN | MCP7940N-I/ST | MCP79400-I/SN | MCP79401-I/SN | MCP79402-I/SN | MCP7940M-I/SN | MCP7940N-E/SN |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active |
| Type | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar |
| Features | Alarm, Leap Year, Square Wave Output, SRAM | Alarm, Leap Year, Square Wave Output, SRAM | Alarm, Leap Year, Square Wave Output, SRAM | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | Alarm, Leap Year, Square Wave Output, SRAM | Alarm, Leap Year, Square Wave Output, SRAM |
| Memory Size | 64B | 64B | 64B | 64B | 64B | 64B | 64B | 64B |
| Time Format | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd |
| Interface | I²C, 2-Wire Serial | I²C, 2-Wire Serial | I²C, 2-Wire Serial | I²C, 2-Wire Serial | I²C, 2-Wire Serial | I²C, 2-Wire Serial | I²C, 2-Wire Serial | I²C, 2-Wire Serial |
| Voltage - Supply | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V |
| Voltage - Supply, Battery | 1.3V ~ 5.5V | 1.3V ~ 5.5V | 1.3V ~ 5.5V | 1.3V ~ 5.5V | 1.3V ~ 5.5V | 1.3V ~ 5.5V | - | 1.3V ~ 5.5V |
| Current - Timekeeping (Max) | 1.2µA @ 3.3V | 1.2µA @ 3.3V | 1.2µA @ 3.3V | 1.2µA (Typ) @ 3.3V | 1.2µA (Typ) @ 3.3V | 1.2µA (Typ) @ 3.3V | 1µA @ 5.5V | 1.2µA @ 3.3V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 8-SOIC | 8-SOIC | 8-TSSOP | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
