Datasheet Microchip MCP7940N
| Manufacturer | Microchip |
| Series | MCP7940N |
The MCP7940N series of low-power Real-Time Clocks (RTC) uses digital timing compensation for an accurate clock/calendar, a programmable output control for versatility, and a power sense circuit that automatically switches to the backup supply
Datasheets
MCP7940N Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover
PDF, 1.4 Mb, File published: Mar 20, 2014
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Status
| MCP7940N-E/MS | MCP7940N-E/SN | MCP7940N-I/MS | MCP7940N-I/P | MCP7940N-I/SN | MCP7940N-I/ST | MCP7940NT-E/MS | MCP7940NT-E/SN | MCP7940NT-E/SNVAO | MCP7940NT-I/MNY | MCP7940NT-I/MS | MCP7940NT-I/SN | MCP7940NT-I/ST | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lifecycle Status | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) | Production (Appropriate for new designs but newer alternatives may exist) |
Packaging
| MCP7940N-E/MS | MCP7940N-E/SN | MCP7940N-I/MS | MCP7940N-I/P | MCP7940N-I/SN | MCP7940N-I/ST | MCP7940NT-E/MS | MCP7940NT-E/SN | MCP7940NT-E/SNVAO | MCP7940NT-I/MNY | MCP7940NT-I/MS | MCP7940NT-I/SN | MCP7940NT-I/ST | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| Package | MSOP | SOIC | MSOP | PDIP | SOIC | TSSOP | MSOP | SOIC | SOIC | TDFN | MSOP | SOIC | TSSOP |
| Pins | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
Parametrics
| Parameters / Models | MCP7940N-E/MS | MCP7940N-E/SN | MCP7940N-I/MS | MCP7940N-I/P | MCP7940N-I/SN | MCP7940N-I/ST | MCP7940NT-E/MS | MCP7940NT-E/SN | MCP7940NT-E/SNVAO | MCP7940NT-I/MNY | MCP7940NT-I/MS | MCP7940NT-I/SN | MCP7940NT-I/ST |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alarms | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) | 2 Alarms (1 sec) |
| Digital_Trimming | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) | -127 to +127ppm (1 ppm steps) |
| Ibat Current, nA | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 |
| Interface | I²C™ | I²C™ | I²C™ | I²C™ | I²C™ | I²C™ | I²C™ | I²C™ | I²C™ | I²C™ | I²C™ | I²C™ | I²C™ |
| Operating Temperature Range, °C | -40 to +125 | -40 to +125 | -40 to +85 | -40 to +85 | -40 to +85 | -40 to +85 | -40 to +125 | -40 to +125 | -40 to +85 | -40 to +85 | -40 to +85 | -40 to +85 | |
| Outputs | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK | IRQ/CLK |
| Power-Fail Timestamp | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore | VCC Fail and VCC Restore |
| Temperature Range | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 | -40 to +125 |
| Unique ID, MAC_Address | None | None | None | None | None | None | None | None | None | None | None | None | None |
| User SRAM, Bytes | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 |
| Vbat Range, V | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 | 1.3 - 5.5 |
| Vcc Range, V | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 | 1.8 - 5.5 |
Eco Plan
| MCP7940N-E/MS | MCP7940N-E/SN | MCP7940N-I/MS | MCP7940N-I/P | MCP7940N-I/SN | MCP7940N-I/ST | MCP7940NT-E/MS | MCP7940NT-E/SN | MCP7940NT-E/SNVAO | MCP7940NT-I/MNY | MCP7940NT-I/MS | MCP7940NT-I/SN | MCP7940NT-I/ST | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RoHS | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Model Line
Series: MCP7940N (13)
Manufacturer's Classification
- Clock and Timing > Real-Time Clock > RTCC