SN74LVC1404YZP datasheet(15/32 Pages) TI2

tên linh kiện	SN74LVC1404YZP

Giải thích chi tiết về linh kiện	SN74LVC1404 Oscillator Driver for Crystal Oscillator or Ceramic Resonator

PDF	32 Pages

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nhà sản xuất	TI2 [Texas Instruments]

Trang chủ	https://www.ti.com

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RS = 10 kW

3.5

2.5

1.5

0.5

200

400

600

800

RS = 2 kW

RS = 240 W

Time − ns

RS = 10 kW

3.5

2.5

1.5

0.5

100

150

200

RS = 3 kW

RS = 450 W

SN74LVC1404

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SCES469F – AUGUST 2003 – REVISED MARCH 2020

Product Folder Links: SN74LVC1404

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10.2.3.2 LVC1404 in 10-MHz Crystal-Oscillator Circuit

C1 ≈ C2 = 30 pF

(4)

XC2 = 480 Ω (capacitive reactance at resonance frequency, that is, 10 MHz)

(5)

VCC = 3.3 V

(6)

Figure 6. Effect of RS on Oscillator Waveform (Frequency = 10 MHz)

Table 4. Effect of RS on Duty Cycle and ICC

(Frequency = 10 MHz)

(Ω)

ICC

(mA)

Positive Duty Cycle

(%)

450

6.9

3 k

8.4

47.6

10 k

15.1

43.9

10.2.3.3 LVC1404 in 2-MHz Crystal-Oscillator Circuit

C1 ≈ C2 = 30 pF

(7)

XC2 = 2.4 kΩ (capacitive reactance at resonance frequency, that is, 2 MHz)

(8)

VCC = 3.3 V

(9)

Figure 7. Effect of RS on Oscillator Waveform (Frequency = 2 MHz)

Table 5. Effect of RS on Duty Cycle and ICC

(Frequency = 2 MHz)

(Ω)

ICC

(mA)

Positive Duty Cycle

(%)

240

11.1

45.9

2 k

7.3

47.3

10 k

8.6

46.7

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