Diodes Launch Automotive‑Grade Low‑Power RTCs with Wide Temperature Range
Diodes now offers automotive‑grade, low‑power real‑time clock (RTC) solutions – the PT7C4363BQ and PT7C4563BQ (the latter featuring an adjustable timer) – designed to meet stringent automotive reliability requirements.
The PT7C4363BQ and PT7C4563BQ are qualified to AEC‑Q100 Grade 1, operating reliably from –40 °C to +125 °C. They are PPAP‑capable and fabricated in IATF 16949‑certified facilities. With an operating voltage range of 1.3 V to 5.5 V and a backup current of just 400 nA at 3.0 V, these devices deliver exceptional power efficiency for long‑life applications.
Each part is engineered for direct interfacing with an external, low‑cost 32.768 kHz crystal featuring an equivalent series resistance up to 100 kΩ. Beyond standard timekeeping, the RTCs can output a selectable square‑wave at 1 Hz, 32 Hz, 1 024 Hz, or 32 768 Hz. Time and date data are accessed via a robust I²C interface, with automatic month‑length and leap‑year handling, and an integrated alarm function. Both devices are available in the compact SOIC‑8 package.
Figure: Functional block diagram for PT7C4363BQ and PT7C4563BQ. (Source: Diodes)
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