MCP7940N-E/SN MICROCHIP Real Time Clock

The MCP7940N‑E/SN from Microchip is a low‑power I²C real‑time clock/calendar with 64‑byte battery‑backed SRAM, factory‑programmed 64‑bit unique ID for security, dual alarms, a programmable square‑wave output, and digital clock calibration achieving ±1.7 min/year accuracy. For selection, the device supports a 1.8–5.5 V main supply, 1.3–5.5 V backup, draws just 1.2 µA at 3.3 V timekeeping current, and features automatic leap‑year correction, power‑fail timestamp, and seamless switchover/brown‑out protection; its AEC‑Q100 qualification and ‑40 °C to +125 °C range suit harsh environments. In application, it excels in utility meters, vending machines, data loggers, medical instruments, industrial controllers, automotive dashboard clocks, smart‑home gateways, POS terminals, server motherboards, GPS‑based time references, and any always‑on embedded system that must maintain accurate time across power cycles. In stock at HL Electronics – request a quote for fast delivery.