CLVC1GX04MDRLREP datasheet(7/15 Pages) TI1

Part #	CLVC1GX04MDRLREP

Description	CRYSTAL OSCILLATOR DRIVER

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Manufacturer	TI1 [Texas Instruments]

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APPLICATION INFORMATION

Values of C1 and C2 are chosen so that

and C1 ≡ C2. Rs is the current-limiting resistor, and the

of C2 at resonance frequency, i.e.,

. RF is the feedback resistor that is used to bias the inverter in the

RF ≅ 2.2 MΩ

CL ≅ 16 pF

C1 ≅ 32 pF

C2 ≅ 32 pF

X2

X1

CLOAD

RLOAD

a) Logic Diagram View

Rs ≅ 1 kΩ

Y

SN74LVC1GU04

Portion

SN74LVC1G04

Portion

SN74LVC1GX04-EP

CRYSTAL OSCILLATOR DRIVER

SGDS029 – SEPTEMBER 2007

Figure 3 shows a typical application of the SN74LVC1GX04 in a Pierce oscillator circuit. The buffered inverter

(SN74LVC1G04 portion) produces a rail-to-rail voltage waveform. The recommended load for the crystal shown

in this example is 16 pF. The value of the recommended load (CL) can be found in the crystal manufacturer's

data sheet.

value depends on the maximum power dissipation of the crystal. Generally, the recommended value of Rs is

specified in the crystal manufacturer's data sheet and, usually, this value is approximately equal to the reactance

linear region of operation. Usually, the value is chosen to be within 1 M

Ω to 10 MΩ.

Figure 3. Oscillator Circuit

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CLVC1GX04MDRLREP Datasheet(PDF) 7 Page - Texas Instruments

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