ALS-PDIC17-79NB-TR8 Datasheet, PDF (5/21 Pages) Everlight Electronics Co., Ltd – I2 Digital Ambient Light Sensor

Surface - Mount
I²C Digital Ambient Light Sensor
ALS-PDIC17-79NB/TR8
AC Characteristics of I2C Signals in Standard and Fast Mode
Parameter
Symbol ^{Standard Mode}
Min. Max.
Fast Mode
Min. max.
I²C clock frequency
fSCL
0
100
0
400
Hold time (repeated) START condition.
After this period, the first clock pulse is
tHD;STA 4.0
0.6
-
generated.
Low period of I²C clock
High period of I²C clock
tLOW
4.7
1.3
tHIGH
4.0
0.6
Set-up time for a repeated START
condition
Data hold time for I²C-bus devices
tSU;STA 4.7
tHD;DAT 0
0.6
3.45 0
0.9
Data set-up time
Rise time of both I²C data and clock
signalss
Fall time of both I²C data and clock
signals
tSU;DAT 250
tr
-
tf
-
-
100
-
1000 5
300
300
0.1
300
Set-up time for STOP condition
tSU;STO 4.0
-
0.6
-
Bus free time between STOP and START _tBUF
4.7
-
condition
1.3
-
Capacitive load for each bus line
Cb
-
400
-
400
Noise margin at the low level for each
VnL
connected device (including hysteresis)
0.1VDD -
0.1VDD -
Noise margin at the high level for each
VnH
connected device (including hysteresis)
0.2VDD -
0.2VDD -
Unit
KHz
uS
uS
uS
uS
uS
nS
nS
nS
uS
uS
pF
V
V
Figure 2. I²C Timing Diagram
Everlight Electronics Co., Ltd.
Document No: DLS-xxxxxxx Rev1
5
http://www.everlight.com
Oct. 12, 2010