BU64240GWZ ROHM [Rohm], BU64240GWZ Datasheet - Page 4

• Manufacturer Part Number: BU64240GWZ
• Description: Silicon Monolithic Integrated Circuit
• Manufacturer: ROHM [Rohm]

Characteristics of the SDA and SCL bus lines for 2-wire serial interface.
Definition of timing on the 2-wire serial interface
(Unless otherwise specified, Ta=-25～+85°C, VCC=2.3～4.8V )
※
The maximum bit transfer rates of 100 kbit/s for STANDARD-MODE devices and 400 kbit/s for FAST-MODE devices
This transfer rates is provided the maximum transfer rates, for example it is able to drive 100 kbit/s of clocks with FAST-MODE.
SCL
SDA
LOW level input voltage
High level input voltage
Hysteresis of Schmitt trigger inputs
LOW level output voltage at 3mA sink current
Pulse width of spikes which must be suppressed by
the input filter
Input current each I/O pin with an input voltage
between 0.1V and 0.9VIN
SCL clock frequency
Hold time (repeated) START condition. After this
period, the first clock pulse is generated
LOW period of the SCL clock
High period of the SCL clock
Set-up time for repeated START condition
Data hold time
Data set-up time
Set-up time for STOP condition
Bus free time between a STOP and START condition
6
STANDARD-MODE and FAST-MODE 2-wire serial interface devices must be able to transmit or receive at that speed.
Fig.4 Definition of timing for serial data
tHD : STA
tBUF
Parameter
max
tSU : DAT
tLOW
tHIGH
tHD;DAT
tSU;STO
tHD;STA
tSU;STA
tSU;DAT
Symbol
tHIGH
tHD : DAT
tLOW
Vhys
fSCL
tBUF
VOL
VIH
VIL
tSP
REV. A
Ii
STANDARD-MODE
SDA
SCL
Min.
1.26
-0.5
250
-10
4.0
4.7
4.0
4.7
4.0
4.7
0
0
0
-
-
Fig.5 Definition of timing for START and STOP bit
tSU : STA
Max.
3.45
100
0.5
4.8
0.4
50
10
-
-
-
-
-
-
-
-
※
6
tHD : STA
START BIT
1.26
0.15
Min.
-0.5
100
-10
0.6
1.3
0.6
0.6
0.6
1.3
FAST-MODE
0
0
0
-
STOP BIT
tSU : STO
Max.
400
0.5
4.8
0.4
0.9
50
10
※
-
-
-
-
-
-
-
-
6
Unit
kHz
uA
ns
us
us
us
us
us
ns
us
us
V
V
V
V
4/5