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BUY BQ4842YMA-85 https://www.utsource.net/itm/p/1568749.html
RO Series - Econoline Unregulated DC-DC Converters; Input Voltage Vdc: 12V; Output Voltage Vdc: 09V; Power: 1W; Industry Standard Pinout; 1kVDC & 2kVDC Isolation; UL94V-0 Package Material; Optional Continuous Short Circuit Protected; Fully Encapsulated; Custom Solutions Available; Efficiency to 85%
The BQ4842YMA-85 is a 32-pin DIP integrated circuit from Texas Instruments. It is a low-power, high-accuracy, real-time clock (RTC) with a built-in power-fail detection circuit. The device is designed to provide a time and calendar function with an accuracy of ±2 minutes/year at a temperature range of -40°C to +85°C. Features: * Low power consumption: 0.4μA in battery backup mode * High accuracy: ±2 minutes/year * Built-in power-fail detection circuit * 32-pin DIP package Applications: * Automotive systems * Industrial control systems * Telecommunications systems * Home appliances * Personal computers (For reference only)