Datasheet > BU9873

BU9873

更新时间： 2022-02-26 10:33:13

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
40页	1221K
描述
I2C BUS Serial Interface RTC with High-precision Oscillation Adjustment

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BU9873 数据手册

Daattaasshheeeett

BU9873

AC Characteristics

_DD≥1.8V

Typ

－

V_DD≥2.5V

Item

Symbol

Unit

Min

Max

100

－

Min

Typ

－

Max

400

－

SCL Clock Frequency

f_SCL

t_LOW

kHz

μs

SCL Clock “L” Time

4.7

4.0

4.7

250

－

1.3

0.6

100

SCL Clock “H” Time

t_HIGH

－

Start Condition Hold Time

Stop Condition Setup Time

Start Condition Setup Time

Data Setup Time

t_HD:STA

t_SU:STO

t_SU:STA

t_SU:DAT

t_HDH:DAT

t_HDL:DAT

t_PL:DAT

t_PZ:DAT

t_R

－

“H” Data Hold Time

－

“L” Data Hold Time

－

SDA “L” Stable Time After Falling of SCL

SDA Off Stable Time After Falling of SCL

Rising Time of SCL and SDA (Input)

Falling Time of SCL and SDA (Input)

－

2.0

1000

300

0.9

300

－

t_F

－

Spike Width that can be Filtered

t_SP

－

Unless additional specified: V_SS=0V, Topt=－40°C to +85°C

(Note1)Not 100% TESTED Condition

Input data level: V_IL=0.2×V_DDV_IH=0.8×V_DD

Input data timing reference level: 0.3×V_DD/0.7×V_DD

Output data timing reference level: 0.3×V_DD/0.7×V_DD

Rise/Fall time: ≦20ns

t_R

t_F

t_HIGH

SCL

t_HD:STA

t_LOW

t_SU:DAT

t_HD:DAT

SDA

(INPUT)

t_PL:DAT

t_PZ:DAT

SDA

(OUTPUT)

Figure 5. Input and output timing

SCL

SDA

t_SU:STA

t_HD:STA

t_SU:STO

START BIT

STOP BIT

Figure 6. Start and stop condition

www.rohm.com

TSZ02201-0919AGZ00010-1-2

6/37

TSZ22111・15・001

13.Sep.2013 REV.001

1...3 4 567 8 9...40

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