The MCP7940N is a battery-backed I¬=C real-time clock/calendar (RTCC) designed for industrial applications, operating within a temperature range of -40¬8C to +125¬8C. It features a comprehensive timekeeping capability, tracking hours, minutes, seconds, day of the week, day, month, and year, with leap year compensation up to the year 2399. The device supports both 12-hour and 24-hour clock formats and includes dual programmable alarms. This RTCC is optimized for use with 32.768 kHz crystals and incorporates on-chip digital trimming for frequency calibration, achieving a resolution of ¬±1 PPM. It operates with a wide voltage range of 1.8V to 5.5V, with a low typical timekeeping current of 1.2 ¬µA at 3.3V and a backup current of 925 nA at 3.0V. The automatic switchover to battery backup ensures continuous operation during power loss, and the power-fail time-stamp feature logs transitions between power sources. The MCP7940N also includes 64 bytes of battery-backed SRAM for user data storage and features a versatile output pin that can be configured for clock output, alarm signaling, or general-purpose use. The device is packaged in an 8-lead SOIC format, making it suitable for various applications requiring reliable timekeeping and data retention.
IC RTC CLK/CALENDAR I2C 8SOIC Product overview: MCP7940N-E/SN from Microchip Technology is a Clock and Timing IC for clock generation, timing distribution, synchronization, RF systems, communication hardware, and digital boards. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include key electrical ratings, package details, and application requirements. Search-friendly keywords include clock generator, oscillator, timing, synchronization, Clock and Timing IC, Real Time Clocks ICs. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 690-MCP7940N-E/SN can be used for catalog matching and distributor lookup.
Win Source Part Number: 1265301-MCP7940N-E/S
Category: Integrated Circuits (ICs)>Clock/Timing - Real Time Clocks
Series: Automotive, AEC-Q100
Type: Clock/Calendar
Features: Alarm, Leap Year, Square Wave Output, SRAM
Package: Tube
Standard Package: 100
Mounting: SMD (SMT)
Memory Size: 64B
Interface: I2C, 2-Wire Serial
Date Format: YY-MM-DD-dd
Voltage - Supply, Battery: 1.3V ~ 5.5V
Current - Timekeeping (Max): 1.2µA @ 3.3V
Voltage - Supply: 1.8V ~ 5.5V
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package: 8-SOIC
Temperature Range - Operating: -40°C ~ 125°C
ECCN: EAR99
Fake Threat In the Open Market: 83 pct.
MSL Level: 1 (Unlimited)
REACH Status: REACH Unaffected
HTSUS: 8542.39.0001
Mfr: Microchip Technology
Other Names: Q14054672,MCP7940NES
Base Product Number: MCP7940
"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
IC RTC CLK/CALENDAR I2C 8-SOIC
IC RTC CLK/CALENDAR I2C 8SOIC
Real Time Clock (RTC) IC Clock/Calendar 64B I²C, 2-Wire Serial 8-SOIC (0.154", 3.90mm Width)
RTCC, -40 TO 125DEG C, SOIC-8; Date Format:Day; Date; Month; Year; Clock Format:HH:MM:SS; Clock IC Type:RTCC; Supply Voltage Min:1.8V; Supply Voltage Max:5.5V; Clock IC Case Style:SOIC; No. of Pins:8Pins; IC Interface Type:I2C; RoHS Compliant: Yes
| ERSAELECTRONICS PTE. LTD. | Win Source Electronics | DigiKey | ODG (Origin Data Global) | Lingto Electronic Limited | Shenzhen Shengyu Electronics Technology Limited | Quarktwin Technology Ltd. | Newark, An Avnet Company | |
|---|---|---|---|---|---|---|---|---|
| Product Category | IC Timers | IC Clocks | IC Clocks | IC Clocks | IC Clocks | IC Clocks | IC Clocks | IC Clocks |
| Product Number | 690-MCP7940N-E/SN | 1265301-MCP7940N-E/SN | MCP7940N-E/SN-ND | MCP7940N-E/SN | MCP7940N-E/SN | MCP7940N-E/SN | MCP7940N-E/SN | 72AC6176 |
| Product Name | Clock and Timing IC | Integrated Circuits (ICs) - Clock/Timing - Real Time Clocks | Real Time Clocks | Real Time Clocks | Clock/Timing - Real Time Clocks | Integrated Circuits (ICs) - Clock-Timing - Real Time Clocks | Real Time Clocks | Rtcc, -40 To 125Deg C, Soic-8; Date Format Microchip |
| Package Type | Tube | Surface Mount; 8-SOIC (0.154", 3.90mm Width) | Surface Mount; SOIC; "8-SOIC (0.154"", 3.90mm Width)" | Surface Mount; SOIC; Surface Mount | Surface Mount; Surface Mount | Surface Mount; SOIC; 8-SOIC (0.154\", 3.90mm Width) | SOIC | |
| Supply Voltage | 1.8 to 5.5 volts | 1.3 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 | ||
| Operating Temperature | -40 C (-40 F) | -40 to 125 C (-40 to 257 F) | -40 to 125 C (-40 to 257 F) | -40 to 125 C (-40 to 257 F) | -40 to 125 C (-40 to 257 F) | -40 to 125 C (-40 to 257 F) |
