The RV5C339A is a CMOS real-time clock IC connected to the CPU by three signal lines CE (Chip Enable), SCLK (Serial Clock), and SIO (Serial Input/Output), and configured to perform serial transmission of time and calendar data to the CPU. This model incorporates different functional circuits, including the periodic interrupt circuit, 2 alarm circuits, oscillation circuit, oscillation halt sensing circuit, supply voltage monitoring circuit, 32-kHz clock output function, and oscillation adjustment circuit. The product features ultra-compact size and low power consumption.
The Ricoh RV5C339A is a CMOS real-time clock integrated circuit designed to interface with CPUs using only three signal lines: Chip Enable (CE), Serial Clock (SCLK), and Serial Input/Output (SIO). It features timekeeping and calendar counters in BCD format, supporting automatic leap year identification up to the year 2099. The device includes two alarm circuits for generating interrupt signals at preset times and a high-precision oscillation adjustment circuit.
| Supply Voltage Range | 1.45 to 5.5 volts |
|---|---|
| Typical Standby Current | 0.35pA at 3V |
| Maximum Clock Frequency | 2 MHz |
| Operating Temperature Range | -40 to +85 °C |
| Package Type | 10-pin SSOP-G |
The maximum input voltage allowed for both the CE and SCLK pins is 5.5 volts.
Yes, it includes a 1900/2000 identification bit to ensure Year 2000 compliance.
The 32KOUT pin outputs pulses at a frequency of 32.768 kHz.