The MCP7940X series, including the MCP79400, MCP79401, and MCP79402, features a battery-backed I¬=C real-time clock/calendar with integrated SRAM and protected EEPROM. This device tracks time with internal counters for hours, minutes, seconds, days, months, and years, and supports leap year compensation up to the year 2399. It operates within a voltage range of 1.8V to 5.5V and has a low timekeeping current of 1.2 ¬µA at 3.3V, making it suitable for low-power applications. The MCP7940X includes 64 bytes of battery-backed SRAM and a 64-bit protected EEPROM area, which can store critical information securely. The device supports I¬=C communication at clock rates up to 400 kHz and features dual programmable alarms, a versatile output pin for clock or alarm signals, and a power-fail timestamp function that logs transitions between battery and main power. It is available in an 8-lead SOIC package, making it compatible with various PCB designs. The operating temperature range is industrial-grade, from -40¬8C to +85¬8C.
"Real Time Clock (RTC) IC Clock/Calendar 64B I²C, 2-Wire Serial 8-SOIC (0.154"", 3.90mm Width)"
IC RTC CLK/CALENDAR I2C 8-SOIC
Manufacturer: Microchip Technology
Win Source Part Number: 926740-MCP79402-I/SN
Operating Temperature Range: -40°C ~ 85°C
Features: Real Time Clock (RTC) IC Clock/Calendar 64B I²C, 2-Wire Serial 8-SOIC (0.154", 3.90mm Width)
Package: 8-SOIC (0.154", 3.90mm Width)
Package: Tube
Mounting: Surface Mount
Family Name: MCP79402
Categories: Integrated Circuits (ICs)
Case / Package: 8-SOIC
ECCN: EAR99
Popularity: High
Fake Threat In the Open Market: 33 pct.
Supply and Demand Status: Balance
Quantity per package: 100
MSL Level: 1 (Unlimited)
Estimated Pruduction Lead Time: 48 Weeks
REACH Status: REACH Unaffected
HTSUS: 8542.39.0001
IC RTC CLK/CALENDAR I2C 8SOIC
RTCC, GP I2C, 64B SRAM, ID, 8SOIC; Date Format:YYYY:MM:WK:DD
IC RTC CLK/CALENDAR I2C 8-SOIC
Real Time Clock (RTC) IC Clock/Calendar 64B I²C, 2-Wire Serial 8-SOIC (0.154", 3.90mm Width)
I2C SOIC-8 Real-time Clocks (RTC) ROHS
| DigiKey | ODG (Origin Data Global) | Win Source Electronics | Shenzhen Shengyu Electronics Technology Limited | Newark, An Avnet Company | Lingto Electronic Limited | Quarktwin Technology Ltd. | LCSC Electronics Technology (HK) Limited | |
|---|---|---|---|---|---|---|---|---|
| Product Category | IC Clocks | IC Clocks | IC Clocks | IC Clocks | IC Clocks | IC Clocks | IC Clocks | IC Clocks |
| Product Number | MCP79402-I/SN-ND | MCP79402-I/SN | 926740-MCP79402-I/SN | MCP79402-I/SN | 12X8721 | MCP79402-I/SN | MCP79402-I/SN | MCP79402-I/SN |
| Product Name | Real Time Clocks | Real Time Clocks | Clock/Timing - Clock/Timing - Real Time Clocks - MCP79402-I/SN | Integrated Circuits (ICs) - Clock-Timing - Real Time Clocks | Rtcc, Gp I2C, 64B Sram, Id, 8Soic; Date Format Microchip | Clock/Timing - Real Time Clocks | Real Time Clocks | RTC/Clock Chip >> Real-time Clocks (RTC) |
| Device Type | Real Time Clock | Clock/Calendar; Real Time Clock | Real Time Clock | Clock/Calendar; Real Time Clock | Alarm RTC; Real Time Clock | Real Time Clock | Real Time Clock | Real Time Clock |
| Package Type | Surface Mount; SOIC; "8-SOIC (0.154"", 3.90mm Width)" | Surface Mount; SOIC; Surface Mount | Surface Mount; 8-SOIC | Surface Mount; Surface Mount | SOIC | Surface Mount; SOIC; 8-SOIC (0.154\", 3.90mm Width) | SOIC | |
| Supply Voltage | 1.8 to 5.5 volts | 1.8 to 5.5 volts | 1.8 to 5.5 volts | 1.8 to 5.5 volts | 1.8 to 5.5 volts |
