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BU9873FVM-GTTR Datasheet(PDF) 1 Page - Rohm |
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BU9873FVM-GTTR Datasheet(HTML) 1 Page - Rohm |
1 / 40 page Datasheet ○Product structure : Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays 1/37 TSZ02201-0919AGZ00010-1-2 © 2013 ROHM Co., Ltd. All rights reserved. 13.Sep.2013 REV.001 www.rohm.com TSZ22111・14・001 Real-Time Clock (RTC) series I 2C BUS Serial Interface RTC with High-precision Oscillation Adjustment BU9873 Outline The BU9873 is a CMOS real-time clock, which has a built-in interrupt generation function. This product is connected to the CPU via I 2C interface, and configured to perform serial transmission of time and calendar data to the CPU. A high-precision oscillation adjustment circuit is also integrated, which is capable of adjusting time counts with digital method, and correcting deviations in the oscillation frequency of the crystal oscillator. Features ■ Connected to the CPU via I 2C Interface ■ Time (Hour ・ Minute ・ Second, Selectable 12-Hour and 24-Hour Mode Setting) ■ Calendar (Year・Month・Day・Week) ■ Periodic Interrupt Function (Output from INTRB, Ranging from 1 Second to 1 Month) ■ Alarm Interrupt Function (Day-of-Week ・ Hour ・ Minute in Setting Format, Output from INTRB) ■ Oscillation Halt Sensing Function ■ 32.768 kHz Clock Output (Output from 32KOUT with Control Pin) ■ ±30 Second Adjustment Function ■ Automatic Leap Year Recognition up to the Year 2099 ■ Built-in Oscillation Stabilizing Capacitors (CG, CD) ■ High-Precision Oscillation Adjustment Circuit Important Characteristics ■ Time Keeping Voltage 1.45V to 5.5V ■ Time Keeping Current 1 0.4µA (Typ) (VDD=3V, Ta=+25°C) ■ Time Keeping Current 2 1.0µA (Max) (VDD=3V, Ta=-40°C to +85°C) ■ Power Supply Voltage 1.8V to 5.5V ■ Access Frequency 1 100kHz (Max) (VDD=1.8V to 2.5V) ■ Access Frequency 2 400kHz (Max) (VDD=2.5V to 5.5V) Package W (Typ) x D (Typ) x H (Max) VSON008X2030 2.00mm x 3.00mm x 0.60mm TSSOP-B8 3.00mm x 6.40mm x 1.20mm SOP8 5.00mm x 6.20mm x 1.71mm SOP- J8 4.90mm x 6.00mm x 1.65mm MSOP8 2.90mm x 4.00mm x 0.90mm |
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