BU9873 Datasheet | ROHM

Features - - - - 2 Connected to the CPU via I C 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 k Hz 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 Package W (Typ) x D (Typ) x H (Max) SOP8 5.00mm x 6.20mm x 1.71mm MSOP8 2.90mm x 4.00mm x 0.90mm - - - - - - - SOP- J8 4.90mm x 6.00mm x 1.65mm VSON008X2030 2.00mm x 3.00mm x 0.60mm TSSOP-B8 3.00mm x 6.40mm x 1.20mm ○Product structure: Silicon monolithic integrated circuit .rohm. © 2013 ROHM Co., Ltd. All rights reserved. TSZ22111- 14- 001 ○This product has no designed protection against radioactive rays 1/37 TSZ02201-0919AGZ00010-1-2 13.Sep.2013 REV.001 http://.. Typical Application Circuit Figure 1. Typical application circuit (with primary battery) Figure 2. Typical application circuit (with secondary battery) .rohm. © 2013 ROHM Co., Ltd. All rights reserved. TSZ22111- 15- 001 2/37 TSZ02201-0919AGZ00010-1-2 13.Sep.2013 REV.001 http://.. Pin Configuration (TOP VIEW) VDD 8 OSCIN 7 OSCOUT 6 :SOP8 :SOP-J8 :TSSOP-B8 :MSOP8 :VSON008X2030 INTRB 5 BU9873F BU9873FJ BU9873FVT BU9873FVM BU9873NUX 1 32KOUT 2 SCL 3 SDA 4 VSS Figure 3. Pin configuration Pin Description Pin No. 1 2 3 4 5 6 7 8 Symbol 32KOUT SCL SDA VSS INTRB OSCOUT OSCIN VDD Input/Output Output Function The 32KOUT pin is used to output 32.768 k Hz clock pulses, which is controlled by an internal register. This pin is enabled during power-on from 0V, and is CMOS push-pull output. The SCL pin is used to input clock pulses synchronizing the...