Datasheet

PRODUCTPREVIEW
MSP432P401R, MSP432P401M
www.ti.com SLAS826 –MARCH 2015
High-Frequency Crystal Oscillator, HFXT (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
f
OSC
= 1 MHz
HFXTBYPASS = 0, HFXTDRIVE = 0,
HFFREQ = 0
3.57
C
L,eff
= 16 pF
Typical ESR , C
SHUNT
FCNTHF_EN = 0
f
OSC
= 4 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 0
0.89
C
L,eff
= 16 pF
Typical ESR , C
SHUNT
FCNTHF_EN = 0
ms
f
OSC
= 8 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 1
0.66
C
L,eff
= 16 pF
Typical ESR , C
SHUNT
FCNTHF_EN = 0
f
OSC
= 16 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 2
0.53
C
L,eff
= 16 pF
Typical ESR , C
SHUNT
FCNTHF_EN = 0
t
START,HFXT
Start-up time
(4)
3.0 V
f
OSC
= 24 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 3
470
C
L,eff
= 16 pF
Typical ESR , C
SHUNT
FCNTHF_EN = 0
f
OSC
= 32 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 4
435
C
L,eff
= 16 pF
Typical ESR , C
SHUNT
FCNTHF_EN = 0
µs
f
OSC
= 40 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 5
425
C
L,eff
= 16 pF
Typical ESR , C
SHUNT
FCNTHF_EN = 0
f
OSC
= 48 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 6
420
C
L,eff
= 16 pF
Typical ESR , C
SHUNT
FCNTHF_EN = 0
Integrated effective load
C
L,eff
1 pF
capacitance
(5) (6)
f
Fault,HFXT
Oscillator fault frequency
(7) (8)
400 700 kHz
(4) Does not include programable startup counter.
(5) Includes parasitic bond and package capacitance (approximately 2 pF per pin).
Because the PCB adds additional capacitance, TI recommeds verifying the correct load by measuring the oscillator frequency through
MCLK or SMCLK. For a correct setup, the effective load capacitance should always match the specification of the crystal.
(6) Requires external capacitors at both terminals. Values are specified by crystal manufacturers. Recommended values supported are
14 pF, 16 pF, and 18 pF. Maximum shunt capacitance of 7 pF.
(7) Frequencies above the MAX specification do not set the fault flag. Frequencies in between the MIN and MAX might set the flag. A static
condition or stuck at fault condition will set the flag.
(8) Measured with logic-level input frequency but also applies to operation with crystals.
Copyright © 2015, Texas Instruments Incorporated Specifications 33
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