ASP00886IRGCT datasheet(29/128 Pages) TI1

29 / 128 page

MSP430F5529, MSP430F5528, MSP430F5527, MSP430F5526

MSP430F5525, MSP430F5524, MSP430F5522, MSP430F5521

MSP430F5519, MSP430F5517, MSP430F5515, MSP430F5514, MSP430F5513

www.ti.com

SLAS590M – MARCH 2009 – REVISED NOVEMBER 2015

5.16 Crystal Oscillator, XT2

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)

(1) (2)

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

fOSC = 4 MHz, XT2OFF = 0, XT2BYPASS = 0,

200

XT2DRIVEx = 0, TA = 25°C

fOSC = 12 MHz, XT2OFF = 0, XT2BYPASS = 0,

260

XT2DRIVEx = 1, TA = 25°C

XT2 oscillator crystal

IDVCC.XT2

3.0 V

µA

current consumption

fOSC = 20 MHz, XT2OFF = 0, XT2BYPASS = 0,

325

XT2DRIVEx = 2, TA = 25°C

fOSC = 32 MHz, XT2OFF = 0, XT2BYPASS = 0,

450

XT2DRIVEx = 3, TA = 25°C

XT2 oscillator crystal

fXT2,HF0

XT2DRIVEx = 0, XT2BYPASS = 0(3)

MHz

frequency, mode 0

XT2 oscillator crystal

fXT2,HF1

XT2DRIVEx = 1, XT2BYPASS = 0 (3)

MHz

frequency, mode 1

XT2 oscillator crystal

fXT2,HF2

XT2DRIVEx = 2, XT2BYPASS = 0 (3)

MHz

frequency, mode 2

XT2 oscillator crystal

fXT2,HF3

XT2DRIVEx = 3, XT2BYPASS = 0 (3)

MHz

frequency, mode 3

XT2 oscillator logic-level

fXT2,HF,SW

square-wave input

XT2BYPASS = 1(4) (3)

0.7

MHz

frequency, bypass mode

XT2DRIVEx = 0, XT2BYPASS = 0,

450

fXT2,HF0 = 6 MHz, CL,eff = 15 pF

XT2DRIVEx = 1, XT2BYPASS = 0,

320

fXT2,HF1 = 12 MHz, CL,eff = 15 pF

Oscillation allowance for

OAHF

HF crystals(5)

XT2DRIVEx = 2, XT2BYPASS = 0,

200

fXT2,HF2 = 20 MHz, CL,eff = 15 pF

XT2DRIVEx = 3, XT2BYPASS = 0,

200

fXT2,HF3 = 32 MHz, CL,eff = 15 pF

fOSC = 6 MHz, XT2BYPASS = 0, XT2DRIVEx = 0,

0.5

TA = 25°C, CL,eff = 15 pF

tSTART,HF

Start-up time

3.0 V

fOSC = 20 MHz, XT2BYPASS = 0, XT2DRIVEx = 2,

0.3

TA = 25°C, CL,eff = 15 pF

Integrated effective load

CL,eff

capacitance, HF

mode(6)(1)

Duty cycle

Measured at ACLK, fXT2,HF2 = 20 MHz

40%

50%

60%

Oscillator fault

fFault,HF

XT2BYPASS = 1(8)

300

kHz

frequency(7)

(1)

Requires external capacitors at both terminals. Values are specified by crystal manufacturers. In general, an effective load capacitance

of up to 18 pF can be supported.

(2)

To improve EMI on the XT2 oscillator the following guidelines should be observed.

•

Keep the traces between the device and the crystal as short as possible.

•

Design a good ground plane around the oscillator pins.

•

Prevent crosstalk from other clock or data lines into oscillator pins XT2IN and XT2OUT.

•

Avoid running PCB traces underneath or adjacent to the XT2IN and XT2OUT pins.

•

Use assembly materials and processes that avoid any parasitic load on the oscillator XT2IN and XT2OUT pins.

•

If conformal coating is used, ensure that it does not induce capacitive or resistive leakage between the oscillator pins.

(3)

This represents the maximum frequency that can be input to the device externally. Maximum frequency achievable on the device

operation is based on the frequencies present on ACLK, MCLK, and SMCLK cannot be exceed for a given range of operation.

(4)

When XT2BYPASS is set, the XT2 circuit is automatically powered down. Input signal is a digital square wave with parametrics defined

in the Schmitt-trigger Inputs section of this data sheet.

(5)

Oscillation allowance is based on a safety factor of 5 for recommended crystals.

(6)

Includes parasitic bond and package capacitance (approximately 2 pF per pin).

Because the PCB adds additional capacitance, TI recommends verifying the correct load by measuring the ACLK frequency. For a

correct setup, the effective load capacitance should always match the specification of the used crystal.

(7)

Frequencies below the MIN specification set the fault flag. Frequencies above the MAX specification do not set the fault flag.

Frequencies between the MIN and MAX specifications might set the flag.

(8)

Measured with logic-level input frequency but also applies to operation with crystals.

Specifications

Submit Documentation Feedback

Product Folder Links: MSP430F5529 MSP430F5528 MSP430F5527 MSP430F5526 MSP430F5525 MSP430F5524

MSP430F5522 MSP430F5521 MSP430F5519 MSP430F5517 MSP430F5515 MSP430F5514 MSP430F5513

ASP00886IRGCT bảng dữ liệu(PDF) 29 Page - Texas Instruments

ASP00886IRGCT bảng dữ liệu(HTML) 29 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL