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XIO2221 Datasheet(PDF) 22 Page - Texas Instruments |
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XIO2221 Datasheet(HTML) 22 Page - Texas Instruments |
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22 / 196 page  XIO2221 SCPS216A – JULY 2009 – REVISED FEBRAURY 2010 www.ti.com Table 2-3. Power-Supply Terminals I/O EXTERNAL SIGNAL BALL NO. DESCRIPTION TYPE PARTS VDD_15 G03 H03 K10 PWR Bypass 1.5-V digital core power for the link M06 B08 P07 capacitors VDDA_15 B10 B09 B07 PWR Filter 1.5-V analog power for the link B05 VDD_33 E03 M05 J10 PWR Bypass 3.3-V digital I/O power for the link H10 G10 capacitors VDD_33_AUX B12 This terminal is connected to VSS through a pulldown resistor, since the XIO2221 does not support auxiliary power. VDDA_33 C03 A10 PWR Filter 3.3-V analog power for the link. This supply terminal is separated from the other power terminals internal to the device to provide noise isolation. DVDD_CORE C09 F03 M09 PWR Bypass Digital 1.95-V circuit power for the PHY. A combination of capacitors high-frequency decoupling capacitors near each terminal is suggested, such as paralleled 0.1 mF and 0.001 mF. An additional 1-mF capacitor is required for voltage regulation. These supply terminals are separated from the other power terminals internal to the device to provide noise isolation. PLLVDD_CORE M07 PWR Bypass PLL 1.95-V circuit power for the PHY. A combination of high-frequency capacitors decoupling capacitors near each terminal is suggested, such as paralleled 0.1 mF and 0.001 mF. An additional 1-mF capacitor is required for voltage regulation, and the PLLVDD_CORE terminals must be separate from the DVDD_CORE terminals. These supply terminals are separated from the other power terminals internal to the device to provide noise isolation. DVDD_33 C08 J03 K03 PWR Bypass 3.3-V digital I/O power for the PHY capacitors AVDD_33 M04 E10 F10 PWR Filter 3.3-V analog power for the PHY J09 K09 M10 PLLVDD_33 N07 PWR Filter PLL 3.3-V circuit power for the PHY. This supply terminal is separated from the other power terminals internal to the device to provide noise isolation. A combination of high-frequency decoupling capacitors near the terminal are suggested, such as paralleled .1uF and .001uF. Lower frequency 10uF filtering capacitors are also recommended. VDD_15_COMB C12 PWR Bypass Internal 1.5-V main power output for external bypass capacitor filtering capacitors Caution: Do not use this terminal to supply external power to other devices. VDD_33_COMB B11 PWR Bypass Internal 3.3-V main power output for external bypass capacitor filtering capacitors Caution: Do not use this terminal to supply external power to other devices. VDD_33_COMBIO C11 PWR Bypass Internal 3.3-V IO power output for external bypass capacitor filtering capacitors Caution: Do not use this terminal to supply external power to other devices. 22 Overview Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): XIO2221 |
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