TCS3404 View Datasheet(PDF) - austriamicrosystems AG
Part Name
Description
MFG CO.
'TCS3404' PDF : 56 Pages View PDF
TCS3404, TCS3414 − Application Information: Hardware
Application Information:
Hardware
Figure 50:
Bus Pull-Up Resistors
Power Supply Decoupling and Application
Hardware Circuit
The power supply lines must be decoupled with a 0.1 μF
capacitor placed as close to the device package as possible
(Figure 50). The bypass capacitor should have low effective
series resistance (ESR) and low effective series inductance (ESI),
such as the common ceramic types, which provide a low
impedance path to ground at high frequencies to handle
transient currents caused by internal logic switching.
VBUS
VDD
RP
RP
RPI
TCS3404/14
0.1 mF
INT
SCL
SDA
Pull-up resistors (RP) maintain the SDA and SCL lines at a high
level when the bus is free and ensure the signals are pulled up
from a low to a high level within the required rise time. For a
complete description of I2C maximum and minimum RP values,
please review the NXP I2C design specification at
www.i2c-bus.org/references.
A pull-up resistor (RPI) is also required for the interrupt (INT),
which functions as a wired-AND signal in a similar fashion to
the SCL and SDA lines. A typical impedance value between 10kΩ
and 100kΩ can be used. Please note that while the figure above
shows INT being pulled up to VDD, the interrupt can optionally
be pulled up to VBUS.
ams Datasheet
[v1-00] 2015-Nov-11
Page 43
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