HT16D35A/HT16D35B
A.C. Characteristics – I2C Serial Bus
Ta=25°C
V
DD=2.4V to 5.5V VDD=3.0V to 5.5V
Symbol
Parameter
Condition
Unit
Min.
Max.
Min.
Max.
fSCL
Clock frequency
—
—
100
—
400
kHz
Time in which the bus must be
free before a new transmission
can start
tBUF
Bus free time
4.7
—
1.3
—
μs
After this period, the first clock
pulse is generated
tHD: STA
Start condition hold time
4
—
0.6
—
μs
tLOW
tHIGH
SCL Low time
SCL High time
—
—
4.7
4
—
—
1.3
0.6
—
—
μs
μs
Only relevant for repeated
START condition
tSU: STA
Start condition setup time
4.7
—
0.6
—
μs
tHD: DAT
tSU: DAT
tR
Data hold time
—
0
250
—
—
4
—
—
1
0
100
—
—
—
ns
ns
μs
μs
μs
μs
Data setup time
—
SDA and SCL rise time
SDA and SCL fall time
Stop condition set-up time
Output Valid from Clock
Note
Note
—
0.3
0.3
—
tF
0.3
—
3.5
—
tSU: STO
tAA
0.6
—
—
—
0.9
Input Filter Time Constant
(SDA and SCL Pins)
tSP
Noise suppression time
—
20
—
20
ns
Note:ꢀTheseꢀparametersꢀareꢀperiodicallyꢀsampledꢀbutꢀnotꢀ100%ꢀtested.
Timing Diagrams
SPI 3-Wire Serial Bus Timing
tCSW
90%
VDD
90%
CSB
10%
10%
VSS
tCSL
tCLK
tCSH
VDD
90%
90%
tCW
90%
90%
CLK
tCW
10%
10%
10%
10%
VSS
tDS
tHS
90%
VDD
90%
DIO
(INPUT )
10% 10%
VSS
VDD
tPD
tPD
90%
90%
10%
DIO
(OUTPUT )
10%
VSS
Rev. 1.00
6
January 12, 2017
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
