Datasheet > IDT5V7855

IDT5V7855

更新时间： 2024-11-24 05:39:07

品牌	Logo	应用领域
艾迪悌 - IDT		可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
14页	1061K
描述
EEPROM Programmable PLL Die for LVCMOS Crystal Oscillator

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IDT5V7855 数据手册

EEPROM Programmable PLL Die for

LVCMOS Crystal Oscillator

IDT5V7855

DATA SHEET

General Description

Features

The IDT5V7855 is a programmable PLL-based clock generator used

for crystal oscillator modules. The device incorporates an on-chip

crystal oscillator with a programmable capacitor tuning array to

support direct connection with fundamental-mode crystals between

16MHz – 50MHz. The capacitor tuning array offers a total of 9 bits of

resolution and provides a step of 0.01pF.

• Input: 16MHz – 50MHz fundamental mode crystal

• Output frequency range: 1MHz – 170MHz in PLL mode,

1MHz – 50MHz in non-PLL mode

• On-chip EEPROM to store device configuration

– 19-bit high-resolution fractional programmable multiplier

– 3-bit prescaler

– 7-bit output divider

– 9-bit crystal oscillator tuning capacitor array

– Selectable function power down or OE control pin

The device incorporates on-chip non-volatile EEPROM cells which

can store all the device settings and maintain them even when there

is no power. The serial programming interface is implemented with

dual-use pins for the clock and data. The CONT input can be

programmed as either a power down input or an output enable input.

Crystal oscillator modules using this device can be stocked as blank

parts and custom frequencies programmed in package at the last

stage before shipping. This enables fast-turn manufacture of custom

and standard crystal oscillators without the need for expensive

dedicated crystals.

• In-package serial programming interface through dual-use pins

• Full 2.5V and 3.3V operating supply

• Maximum frequency shift across supply voltage: 1ppm

• Available in die pack, lead-free RoHS compliant

• ESD Human Body Model (HBM) and Machine Model (MM):

– HBM: 2000V

– MM: 200V

The IDT PLL uses a patent-pending fractional multiplier technique to

provide ultra-high resolution multiplication and division from input to

output with low jitter. In addition, prescaler and post-

• Small die size: 0.75mm x 0.75mm

• Supports 20mm x 16mm package size

• -40°C to 85°C ambient operating temperature

divider circuits are included to enhance the granularity of clock

scaling. The PLL may also be bypassed in order to operate the

device as a non-PLL fundamental-mode crystal oscillator for

applications that do not require frequency multiplication. The device

is fabricated using advance technology and can support both 2.5V

and 3.3V operation. The device is small enough to fit into

small-footprint crystal oscillators. This is the industry’s smallest

programmable die and can support crystal oscillator packages as

small as 20mm x 16mm.

Functional Block Diagram

Pad Assignment

V_DD

Output

Divider

OUT

V_DD

÷2

OUT

OSC

PFD

VCO

Pre-Scaler

3-bit

7-bit

Fractional

Multiplier

Tuning

Cap

19-bit

V^SS

CONT

9-bit

EEPROM

IDT5V7855

Pullup

CONT

0.75mm x 0.75mm Die

IDT5V7855-DPK REVISION A MARCH 11, 2010

12 3 4 5 6 7...14

中文翻译

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与IDT5V7855相关器件

型号	品牌	获取价格	描述	数据表
IDT5V80001GI	IDT	获取价格	Clock Generator
IDT5V80001GI8	IDT	获取价格	Clock Generator
IDT5V925	IDT	获取价格	PROGRAMMABLE CLOCK GENERATOR
IDT5V925BI	IDT	获取价格	Programmable LVCMOS/LVTTL Clock Generator
IDT5V925QGI	IDT	获取价格	PROGRAMMABLE CLOCK GENERATOR
IDT5V925QGI8	IDT	获取价格	Clock Generator, 160MHz, PDSO16, 0.150 INCH, QSOP-16
IDT5V925QI	IDT	获取价格	PROGRAMMABLE CLOCK GENERATOR
IDT5V925QI8	IDT	获取价格	Clock Generator, 160MHz, PDSO16, 0.150 INCH, LEAD FREE, QSOP-16
IDT5V926	IDT	获取价格	SINGLE OUTPUT CLOCK GENERATOR
IDT5V926A	IDT	获取价格	Single Output Clock Generator

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