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TDA4VM21 Datasheet(PDF) 205 Page - Texas Instruments

Part # TDA4VM21
Description  TDA4VM Processors
PDF  331 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
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TDA4VM21 Datasheet(HTML) 205 Page - Texas Instruments

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The crystal must be in the fundamental mode of operation and parallel resonant. Table 6-34 summarizes the
required electrical constraints.
Table 6-34. WKUP_LFOSC0 Crystal Electrical Characteristics
NAME
DESCRIPTION
MIN
TYP
MAX
UNIT
fp
Parallel resonance crystal frequency
32768
Hz
Cf1
Cf1 load capacitance for crystal parallel resonance with Cf1 = Cf2
12
24
pF
Cf2
Cf2 load capacitance for crystal parallel resonance with Cf1 = Cf2
12
24
pF
Cshunt
Shunt capacitance
ESRxtal – 40 Ω
4
pF
ESRxtal – 60 Ω
3
pF
ESRxtal – 80 Ω
2
pF
ESRxtal – 100 Ω
1
pF
ESR
Crystal effective series resistance
100
kΩ
When selecting a crystal, the system design must consider the temperature and aging characteristics of a based
on the worst case environment and expected life expectancy of the system.
Table 6-35 details the switching characteristics of the oscillator and the requirements of the input clock.
Table 6-35. WKUP_LFOSC0 Switching Characteristics – Crystal Mode
NAME
DESCRIPTION
MIN
TYP
MAX
UNIT
fxtal
Oscillation frequency
32768
Hz
tsX
Start-up time
96.5
ms
VDDA_WKUP
WKUP_LFOSC0_XO
t
sX
Time
VSS
VDDA_WKUP (min.)
VDD_WKUP (min.)
VSS
VDD_WKUP
J7ES_LF_OSC_STARTUP_13
Figure 6-36. WKUP_LFOSC0 Start-up Time
6.9.4.1.7 WKUP_LFOSC0 Not Used
Figure 6-37 shows the recommended oscillator connections when WKUP_LFOSC0 is not used.
WKUP_LFOSC0 may be a no-connect while the oscillator remains disabled since the internal pull-down resistor
is enabled by default.
www.ti.com
TDA4VM-Q1, TDA4VM
SPRSP36K – SEPTEMBER 2021 – REVISED APRIL 2024
Copyright © 2024 Texas Instruments Incorporated
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Product Folder Links: TDA4VM-Q1 TDA4VM



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