BL55077
zip: 200233
Shanghai Belling Corp., Ltd
Tel: 86-021-64850700 Fax: 86-021-64855865
8
AC Characteristic
Test Condition
Min
Typ
Ta=25
o
C
Max
Unit
Symbol Parameter
Fclk
Fclk
Tclk
Tsh1
Tsh2
tlow
thig
thd
Oscillator
frequency
Oscillator
frequency
Half oscillator cycle
CS start hold time
SCL start hold time
High time
Low time
SCL hold time
Vdd=5V,normal mode
Vdd=3.3V, power saving
mode
125
21
1
5
5
5
4
250
180
31
-
-
-
-
-
300
48
3
KHz
KHz
uA
us
us
us
us
ns
Fig 6
9
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。
。
1/ single application
6