TCA6507_16 Datasheet, PDF (33/45 Pages) Texas Instruments – Low-Voltage 7-Bit I2C and SMBus LED Driver

www.ti.com
TCA6507
SCPS164C – MAY 2007 – REVISED JANUARY 2016
Glitches in the power supply can also affect the power-on reset performance of this device. The glitch width
(V_{CC_GW}), and height (V_{CC_GH}) are dependent on each other. The bypass capacitance, source impedance, and
device impedance are factors that affect power-on reset performance. Figure 28 and Recommended Supply
Sequencing and Ramp Rates provide more information on how to measure these specifications.
V_CC
V_{CC_GH}
Time
V_{CC_GW}
Figure 28. Glitch Width and Glitch Height
V_POR is critical to the power-on reset. V_POR is the voltage level at which the reset condition is released and all the
registers and the I²C/SMBus state machine are initialized to their default states. The value of V_POR differs based
on the V_CC being lowered to or from 0. Figure 29 and Recommended Supply Sequencing and Ramp Rates
provide more details on this specification.
V_CC
V_POR
V_PORF
POR
Time
Figure 29. V_POR
Time
Copyright © 2007–2016, Texas Instruments Incorporated
Product Folder Links: TCA6507
Submit Documentation Feedback
33