Electronic Components Datasheet Search |
|
TCA9554PWR Datasheet(PDF) 25 Page - Texas Instruments |
|
|
TCA9554PWR Datasheet(HTML) 25 Page - Texas Instruments |
25 / 39 page V CC Time V CC_GH V CC_GW VCC Ramp-Up Time to Re-Ramp Time Ramp-Down VCC drops below V 50 mV PORF – VCC_RT VCC_FT VCC_TRR TCA9554 www.ti.com SCPS233D – MARCH 2012 – REVISED AUGUST 2015 10 Power Supply Recommendations 10.1 Power-On Reset Requirements In the event of a glitch or data corruption, TCA9554 can be reset to its default conditions by using the power-on reset feature. Power-on reset requires that the device go through a power cycle to be completely reset. This reset also happens when the device is powered on for the first time in an application. The two types of power-on reset are shown in and Figure 29. Figure 29. VCC is Lowered Below the POR Threshold, Then Ramped Back Up to VCC Table 8 specifies the performance of the power-on reset feature for TCA9554 for both types of power-on reset. Table 8. Recommended Supply Sequencing And Ramp Rates(1) PARAMETER MIN TYP MAX UNIT VCC_FT Fall rate See Figure 29 1 ms VCC_RT Rise rate See Figure 29 0.1 ms Time to re-ramp (when VCC drops to VPOR_MIN – 50 mV or when VCC_TRR See Figure 29 2 μs VCC drops to GND) Level that VCCP can glitch down to, but not cause a functional VCC_GH See Figure 30 1.2 V disruption when VCC_GW = 1 μs Glitch width that will not cause a functional disruption when VCC_GW See Figure 30 10 μs VCC_GH = 0.5 × VCC (1) All supply sequencing and ramp rate values are measured at TA = 25°C Glitches in the power supply can also affect the power-on reset performance of this device. The glitch width (VCC_GW) and height (VCC_GH) are dependent on each other. The bypass capacitance, source impedance, and device impedance are factors that affect power-on reset performance. Figure 30 and Table 8 provide more information on how to measure these specifications. Figure 30. Glitch Width and Glitch Height VPORR is critical to the power-on reset. VPORR 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 power-on-reset voltage differs based on the VCC being lowered to or from 0 (VPORR or VPORF). Figure 31 and Table 8 provide more details on this specification. Copyright © 2012–2015, Texas Instruments Incorporated Submit Documentation Feedback 25 Product Folder Links: TCA9554 |
Similar Part No. - TCA9554PWR |
|
Similar Description - TCA9554PWR |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |