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BU9873 반도체 회로 부품 판매점

I2C BUS Serial Interface RTC



ROHM Semiconductor 로고
ROHM Semiconductor
BU9873 데이터시트, 핀배열, 회로
Datasheet
Real-Time Clock (RTC) series
I2C 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 I2C 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.
Important Characteristics
Time Keeping Voltage
Time Keeping Current 1
(VDD=3V, Ta=+25°C)
Time Keeping Current 2
(VDD=3V, Ta=-40°C to +85°C)
Power Supply Voltage
Access Frequency 1
(VDD=1.8V to 2.5V)
Access Frequency 2
(VDD=2.5V to 5.5V)
1.45V to 5.5V
0.4µA (Typ)
1.0µA (Max)
1.8V to 5.5V
100kHz (Max)
400kHz (Max)
Features
Connected to the CPU via I2C Interface
Time (Hour Minute Second, Selectable 12-Hour
and 24-Hour Mode Setting)
Calendar (YearMonthDayWeek)
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
Package
W (Typ) x D (Typ) x H (Max)
SOP8
MSOP8
5.00mm x 6.20mm x 1.71mm 2.90mm x 4.00mm x 0.90mm
SOP- J8
VSON008X2030
4.90mm x 6.00mm x 1.65mm 2.00mm x 3.00mm x 0.60mm
TSSOP-B8
3.00mm x 6.40mm x 1.20mm
Product structure: Silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has no designed protection against radioactive rays
1/37
TSZ02201-0919AGZ00010-1-2
13.Sep.2013 REV.001
http://www.Datasheet4U.com


BU9873 데이터시트, 핀배열, 회로
BU9873
Typical Application Circuit
Datasheet
Figure 1. Typical application circuit (with primary battery)
Figure 2. Typical application circuit (with secondary battery)
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/37
TSZ02201-0919AGZ00010-1-2
13.Sep.2013 REV.001
http://www.Datasheet4U.com




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