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參數(shù)資料
型號: TPS65920BZCH
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA139
封裝: 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139
文件頁數(shù): 106/115頁
文件大小: 1232K
代理商: TPS65920BZCH
Signalswing
limitingcircuit
Biasgenerator
andstartup
circuit
XI
XO
Signal
shaping
Squarewave:
Vpp=VIO_1P8V
Y
Currentcontrol
circuitandmode
selection
Floating
VBATOK
(1)
Internal
GND
Internal
GND
VBATOK
(1)
037-040
SWCS037G
– MAY 2008 – REVISED APRIL 2011
(1)
Switches close by default and open only if register access enables very-low-power mode when VBAT
< 2.7 V.
Figure 11-9. 32-kHz Oscillator in Bypass Mode Block Diagram Without Crystal Option 3
Table 11-7 lists the electrical constraints required by the 32-kHz input square- or sine-wave clock.
Table 11-7. 32-kHz Input Square- or Sine-Wave Clock Source Electrical Characteristics
Name
Parameter Description
Min
Typ
Max
Unit
f
Frequency
32.768
kHz
CI
Input capacitance
35
pF
CFI
On-chip foot capacitance to GND on each input (see Figure 11-7, Figure 11-8, and
10
pF
VPP
Square-/sine-wave amplitude in bypass mode or not
1.8(1)
V
VIH
Voltage input high, square wave in bypass mode
0.8
V
VIL
Voltage input low, square wave in bypass mode
0.6
V
(1)
Bypass input maximum voltage is the same as the maximum voltage provided for the I/O interface.
Table 11-8 lists the timing requirements of the 32-kHz square-wave input clock.
Table 11-8. 32-kHz Square-Wave Input Clock Source Timing Requirements
Name
Parameter
Description
Min
Typ
Max
Unit
CK0
1/tC(32KHZ)
Frequency, 32 kHz
32.768
MHz
CK1
tW(32KHZ)
Pulse duration, 32 kHz low or high
0.45*tC(32KHZ)
0.55*tC(32KHZ)
μs
CK3
tR(32KHZ)
Rise time, 32 kHz(1)
0.1*tC(32KHZ)
μs
CK4
tF(32KHZ)
Fall time, 32 kHz(1)
0.1*tC(32KHZ)
μs
(1)
The capacitive load is 30 pF.
90
Clock Specifications
Copyright
2008–2011, Texas Instruments Incorporated
focus.ti.com: TPS65930/TPS65920
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