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TSB43AB22 データシート(PDF) 20 Page - Texas Instruments

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部品番号 TSB43AB22
部品情報  INTERGRATED 1394a-2000 OHCI PHY/LINK-LAYER CONTROLLER
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

TSB43AB22 データシート(HTML) 20 Page - Texas Instruments

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2–8
Table 2–8. Power Supply Terminals
TERMINAL
TYPE
I/O
DESCRIPTION
NAME
NO.
TYPE
I/O
DESCRIPTION
AGND
109–111, 117,
126–128
Supply
Analog circuit ground terminals. These terminals must be tied together to the low-impedance
circuit board ground plane.
AVDD
1, 2, 107, 108,
120
Supply
Analog circuit power terminals. A parallel combination of high frequency decoupling capacitors
near each terminal is suggested, such as 0.1
µF and 0.001 µF. Lower frequency 10-µF filtering
capacitors are also recommended. These supply terminals are separated from PLLVDD and
DVDD internal to the device to provide noise isolation. They must be tied at a low-impedance
point on the circuit board.
DGND
17, 23, 33, 44,
55, 64, 68, 75,
83, 103
Supply
Digital circuit ground terminals. These terminals must be tied together to the low-impedance
circuit board ground plane.
DVDD
15, 27, 39, 51,
59, 72, 88,
100
Supply
Digital circuit power terminals. A parallel combination of high frequency decoupling capacitors
near each DVDD terminal is suggested, such as 0.1 µF and 0.001 µF. Lower frequency 10-µF
filtering capacitors are also recommended. These supply terminals are separated from PLLVDD
and AVDD internal to the device to provide noise isolation. They must be tied at a low-impedance
point on the circuit board.
PLLGND
8
Supply
PLL circuit ground terminal. This terminal must be tied to the low-impedance circuit board
ground plane.
PLLVDD
7
Supply
PLL circuit power terminal. A parallel combination of high frequency decoupling capacitors near
the terminal is suggested, such as 0.1
µF and 0.001 µF. Lower frequency 10-µF filtering
capacitors are also recommended. This supply terminal is separated from DVDD and AVDD
internal to the device to provide noise isolation. It must be tied to a low-impedance point on the
circuit board.
REG18
30, 93
Supply
REG18. 1.8-V power supply for the device core. If the internal voltage regulator is enabled
(REG_EN is tied low), these terminals must be left unconnected. The internal voltage regulator
provides 1.8 V from DVDD. When the internal regulator is disabled (REG_EN is high), the
REG18 terminals can be used to supply an external 1.8-V supply to the TSB43AB22 core. It
is recommended that 0.1-
µF bypass capacitors be used and placed close to these terminals.
VDDP
20, 35, 48, 62,
78
Supply
PCI signaling clamp voltage power input. PCI signals are clamped per the PCI Local Bus
Specification. In addition, if a 5-V ROM is used, the VDDP must be connected to 5 V.


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