841N254B datasheet(4/24 Pages) IDT

Part #	841N254B

Description	FemtoClock NG Crystal-to-LVDS/ HCSL Clock Synthesizer

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Manufacturer	IDT [Integrated Device Technology]

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Revision B, May 23, 2016

841N254B Datasheet

Absolute Maximum Ratings

NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress

specifications only. Functional operation of the product at these conditions or any conditions beyond those listed in the DC Characteristics or

AC Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.

DC Electrical Characteristics

Table 4A. Power Supply DC Characteristics, VDD = VDDOA = VDDOB = 3.3V±5% or 2.5V±5%, TA = -40°C to 85°C

Table 4B. LVCMOS/LVTTL Input DC Characteristics, VDD = VDDOA = VDDOB = 3.3V±5% or 2.5V±5%, TA = -40°C to 85°C

Item

Rating

Supply Voltage, VDD

3.6V

Inputs, VI

XTAL_IN

Other Inputs

0V to 2V

-0.5V to VDD + 0.5V

Outputs, VO (HCSL)

-0.5V to VDD + 0.5V

Outputs, IO (LVDS)

Continuous Current

Surge Current

10mA

15mA

Package Thermal Impedance,



JA

37.7°C/W (0 mps)

Storage Temperature, TSTG

-65

C to 150C

Symbol

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

VDD

Core Supply Voltage

3.135

3.3

3.465

V

2.375

2.5

2.625

V

VDDA

Analog Supply Voltage

VDD – 0.30

3.3

VDD

V

VDD – 0.30

2.5

VDD

V

VDDOA&B Output Supply Voltage

3.135

3.3

3.465

V

2.375

2.5

2.625

V

IDDA

Analog Supply Current

30

mA

IDD

Power Supply Current

113

mA

IDDOA&B

Output Supply Current

72

mA

Symbol

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

VIH

Input High Voltage

VDD = 3.3V

2

VDD + 0.3

V

VDD = 2.5V

1.7

VDD + 0.3

V

VIL

Input Low Voltage

VDD = 3.3V

-0.3

0.8

V

VDD = 2.5V

-0.3

0.7

V

IIH

Input High

Current

nOEA, nOEB,

BYPASS, REF_SEL,

REF_CLK, F_SEL[1:0]

VDD = VIN = 2.625V or 3.465V

150

µA

IIL

Input Low

Current

nOEA, nOEB,

BYPASS, REF_SEL,

REF_CLK, F_SEL[1:0]

VDD = 2.625V or 3.465V,

VIN = 0V

-5

µA

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