Datasheet > DS4000D0BGA

DS4000D0BGA

更新时间： 2023-02-15 00:00:00

品牌	Logo	应用领域
达拉斯 - DALLAS		/
页数	文件大小	规格书
14页	246K
描述
Oscillator, 10MHz Min, 19.44MHz Max, 13MHz Nom,

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DS4000D0BGA 数据手册

DS4000

TEMPERATURE-COMPENSATED CRYSTAL OSCILLATOR

The DS4000 can either function as a standalone TCXO or as a digitally controlled TCXO. When used as

a standalone TCXO, the only requirements needed to function properly are power, ground, and an output.

However, the 2-wire interface must be used to tune (push and pull) the crystal.

The DS4000 is capable of supplying two different outputs, F₁and F₂.

1) F₁is the base frequency of the crystal unit inside of the device. The output type is a CMOS square

wave.

2) F₂is a programmable frequency output. The frequency select register can program this output to an

integer division of the base (F₁) frequency. The duty cycle (DC) bit determines if the output is an

n + 1 or a 2(n + 1) division of F₁.

F₂FREQUENCY SELECT REGISTER (FSR) (5Dh)

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

F₂= F₁/ (FSR value + 1); with DC = 0

F₂= F₁/ [2 x (FSR value + 1)]; with DC = 1

TCXO CONTROL REGISTER (60h)

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

F₂OE

BIT 2

F₁OE

BIT 1

F_T

BIT 0

DC – Duty Cycle Bit. If 50% duty cycle is desired, then this bit must be set to logic 1. The default

condition at power-up is logic 0.

F_T– This bit must be programmed by the user to a 0.

F₁OE – F₁Output Enable Bit. This bit allows the user to disable/enable the F₁output.

F₂OE – F₂Output Enable Bit. This bit allows the user to disable/enable the F₂output.

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