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BU9873FVM-GTTR Datasheet(PDF) 1 Page - Rohm

Part # BU9873FVM-GTTR
Description  I2C BUS Serial Interface RTC with High-precision Oscillation Adjustment
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BU9873FVM-GTTR Datasheet(HTML) 1 Page - Rohm

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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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