BL55070
zip: 200233
Shanghai Belling Corp., Ltd
Tel: 86-021-64850700 Fax: 86-021-64855865
8
Fclk
Fclk
Tclk
Tsh1
Tsh2
tlow
thig
thd
AC Characteristic
Test Condition
Vdd=5V,normal mode
Vdd=3.3V, power saving
mode
Ta=25
o
C
Min
125
21
1
5
5
5
4
250
Symbol Parameter
Oscillator
frequency
Oscillator
frequency
Half oscillator cycle
CS start hold time
SCL start hold time
High time
Low time
SCL hold time
Typ
180
31
-
-
-
-
-
Max
300
48
3
Unit
KHz
KHz
uA
us
us
us
us
ns
Fig 6
Typical Application Circuit
No
te:
1/
when I
2
C are idle mode,SDA and SCL must be connect to high level(by pull up
resistor),otherwise the device maybe can not go into power saving mode.
2/
3/
In power-saving mode, SCL frequency must be less than 21KHz.
Work at
1/3 bias, Vdd – Vlcd must be more than 2.9V。
bias,
2.9V。
9
Fig 7
6
BELLING [ SHANGHAI BELLING CO., LTD. ]
