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SiT9347

220 MHz to 725 MHz Endura™ Series Ultra-low Jitter Differential Oscillator

Description

The

SiT9347

is a 220.000001 MHz to 725 MHz

differential MEMS XO engineered for low-jitter, high

reliability applications. Utilizing SiTime’s unique

DualMEMS™

temperature

sensing

and

TurboCompensation™ technology, the SiT9347 delivers

exceptional dynamic performance by providing

resistance to airflow, thermal gradients, shock and

vibration. This device also integrates multiple on-chip

regulators to filter power supply noise, eliminating the

need for a dedicated external LDO.

The SiT9347 can be factory programmed for any

combination of frequency, stability, voltage, and output

signaling. Programmability enables designers to optimize

clock configurations while eliminating long lead times and

customization costs associated with quartz devices

where each frequency is custom built.

The wide frequency range and programmability makes

this device ideal for telecom, networking, and industrial

applications that require a variety of frequencies and

operate in noisy environments.

Refer to

Manufacturing Notes

for proper reflow profile,

tape and reel dimension, and other manufacturing

related information.

Features



0.1 ppb/g acceleration sensitivity for harsh environments

Any frequency between 220.000001 MHz and 725 MHz,

accurate to 6 decimal places.

LVPECL, LVDS and HCSL output signaling

0.1ps RMS phase jitter (random) for Ethernet applications

Frequency stability as low ±10 ppm

Wide temperature range from -40°C to 105°C

Contact SiTime

for higher temperature range options

Industry-standard packages: 3.2 x 2.5, 7.0 x 5.0 mm

and 5.0 x 3.2 mm package

Applications



Airborne Communications

Command and Control

Field Communications

Airframe/Engine Management Control

Radar

SATCOM

Block Diagram

Package Pinout

OE/NC

GND

VDD

OUT-

OUT+

Figure 1. SiT9347 Block Diagram

Figure 2. Pin Assignments (Top view)

(Refer to

Table 6

for Pin Descriptions)

Rev 0.5

July 22, 2019

www.sitime.com

SiT9347

220 MHz to 725 MHz Endura™ Series Ultra-low Jitter Differential Oscillator

Ordering Information

SiT9347AC -1B2A33E322.265625T

Part Family

“SiT9347”

Packaging

“T”, “Y”, “D” or “E”

Refer to table below for packing method

[1]

Leave Blank for Bulk

Revision Letter

“A” is the revision of Silicon

Frequency

Temperature Range

“C”: Extended Commercial, -20 to 70°C

“I”: Industrial, -40 to 85°C

“B”: -40 to 95°C

“E”: Extended Industrial, -40 to 105°C

220.00001 to 725 MHz for LVDS and

LVPECL output drivers

[2]

220.00001 to 500 MHz for HCSL driver

Feature Pin

“N”: No Connect

“E”: Output Enable

Signalling Type

“1”: LVPECL

“2”: LVDS

“4”: HCSL

Package Size

“B”: 3.2 x 2.5 mm

“C”: 5.0 x 3.2 mm with center pad

“E”: 7.0 x 5.0 mm with center pad

Frequency Stability

“F”:

“1”:

“2”:

“3”:

±10 ppm

±20 ppm

±25 ppm

±50 ppm

Voltage Supply

“25”: 2.5 V ±10%

“28”: 2.8 V ±10%

“30”: 3.0 V ±10%

“33”: 3.3 V ±10%

Special Features

“A” for Low g-Sensitivity, 0.1ppb/g

Notes:

1. Bulk is available for sampling only.

Contact SiTime

for higher frequency HCSL options.

Table 1. Ordering Codes for Supported Tape & Reel Packing Method

Device Size

(mm x mm)

7.0 x 5.0

5.0 x 3.2

3.2 x 2.5

8 mm T&R

(3ku)

—

8 mm T&R

(1ku)

—

12 mm T&R

(3ku)

—

12 mm T&R

(1ku)

—

16 mm T&R

(3ku)

16 mm T&R

(1ku)

Rev 0.5

Page 2 of 18

www.sitime.com

SiT9347

220 MHz to 725 MHz Endura™ Series Ultra-low Jitter Differential Oscillator

TABLE OF CONTENTS

Description ................................................................................................................................................................................... 1

Features ....................................................................................................................................................................................... 1

Applications .................................................................................................................................................................................. 1

Block Diagram .............................................................................................................................................................................. 1

Package Pinout ............................................................................................................................................................................ 1

Ordering Information .................................................................................................................................................................... 2

Electrical Characteristics .............................................................................................................................................................. 2

Waveform Diagrams..................................................................................................................................................................... 6

Termination Diagrams .................................................................................................................................................................. 8

LVPECL ................................................................................................................................................................................ 8

LVDS ................................................................................................................................................................................... 10

HCSL .................................................................................................................................................................................. 11

Dimensions and Patterns ― 3.2 x 2.5 mm

................................................................................................................................ 12

Dimensions and Patterns ― 5.0 x 3.2 mm

................................................................................................................................ 12

Dimensions and Patterns ― 7.0 x 5.0 mm

................................................................................................................................ 13

Additional Information................................................................................................................................................................. 14

Revision History ......................................................................................................................................................................... 15

Rev 0.5

Page 2 of 18

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SiT9347

220 MHz to 725 MHz Endura™ Series Ultra-low Jitter Differential Oscillator

Electrical Characteristics

All Min and Max limits in the Electrical Characteristics tables are specified over temperature and rated operating voltage

with standard output termination shown in the termination diagrams. Typical values are at 25°C at nominal supply voltage.

Table 2. Electrical Characteristics – Common to LVPECL, LVDS and HCSL

Parameter

Output Frequency Range

Frequency Stability

Symbol

F_stab

Min.

220.000001

-10

Typ.

–

Max.

725

+10

Unit

MHz

ppm

Condition

Accurate to 6 decimal places

Inclusive of initial tolerance, operating temperature, rated power

supply voltage and load variations.

Contact SiTime

for ±10 ppm.

Inclusive of initial tolerance, operating temperature, rated power

supply voltage and load variations

Frequency Range

Frequency Stability

-20

-25

-50

First Year Aging

10 Year Aging

20 Year Aging

F_1y

F_10y

F_20y

-0.7

-1.4

-1.6

–

±0.4

±0.8

±1.0

+20

+25

+50

+0.7

+1.4

+1.6

ppm

At 85°C

Temperature Range

Operating Temperature Range

T_use

-20

-40

Acceleration (g) sensitivity,

Gamma Vector

Supply Voltage

F_g

–

+70

+85

+95

+105

°C

Extended Industrial

Low sensitivity grade; total gamma over 3 axes; 15 Hz to 2 kHz; MIL-

PRF-55310, computed per section 4.8.18.3.1

Extended Commercial

Industrial

Rugged Characteristics

–

0.1

ppb/g

Supply Voltage

Vdd

2.97

2.70

2.52

2.25

Input Voltage High

Input Voltage Low

Input Pull-up Impedance

Duty Cycle

Startup Time

OE Enable/Disable Time

VIH

VIL

Z_in

T_start

T_oe

70%

–

3.30

3.00

2.80

2.50

–

100

–

3.63

3.30

3.08

2.75

–

30%

3.0

3.8

Vdd

kΩ

µs

Measured from the time Vdd reaches its rated minimum value.

f = 322.265625 MHz. Measured from the time OE pin reaches rated

VIH and VIL to the time clock pins reach 90% of swing and high-Z.

See

Figure 8

and

Figure 9

Pin 1, OE

Pin 1, OE logic high or logic low

Input Characteristics

Output Characteristics

Startup and OE Timing

Rev 0.5

Page 2 of 18

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SiT9347

220 MHz to 725 MHz Endura™ Series Ultra-low Jitter Differential Oscillator

Table 3. Electrical Characteristics – LVPECL Specific

Parameter

Current Consumption

OE Disable Supply Current

Output Disable Leakage Current

Maximum Output Current

Output High Voltage

Output Low Voltage

Output Differential Voltage Swing

Rise/Fall Time

RMS Period Jitter

[3]

Symbol

Idd

I_OE

I_leak

I_driver

VOH

VOL

V_Swing

Tr, Tf

T_jitt

T_phj

Min.

–

Vdd-1.15

Vdd-2.0

1.2

–

Typ.

–

0.15

–

1.6

225

1.0

0.220

Max.

–

Vdd-0.7

Vdd-1.5

2.0

330

1.6

0.270

Unit

A

Condition

Excluding Load Termination Current, Vdd = 3.3V or 2.5V

OE = Low

Maximum average current drawn from OUT+ or OUT-

See

Figure 4

See

Figure 4

See

Figure 5

20% to 80%, see

Figure 5

f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V

f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz, all

Vdd levels, includes spurs. Temperature ranges -20 to 70ºC and

-40 to 85ºC.

f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,

all Vdd levels, includes spurs. Temperature ranges -40 to 95ºC and

-40 to 105ºC

f = 322.265625 MHz, IEEE802.3-2005 10GbE jitter mask

integration bandwidth = 1.875 MHz to 20 MHz, Includes spurs, all

Vdd levels

f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V

f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz, all

Vdd levels, includes spurs. Temperature ranges -20 to 70ºC and

-40 to 85ºC.

f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,

all Vdd levels, includes spurs. Temperature ranges -40 to 95ºC and

-40 to 105ºC

f = 322.265625 MHz, IEEE802.3-2005 10GbE jitter mask

integration bandwidth = 1.875 MHz to 20 MHz, Includes spurs, all

Vdd levels

Current Consumption

Output Characteristics

Jitter – 7.0 x 5.0 mm Package

RMS Phase Jitter (random)

–

0.220

0.300

–

0.1

–

Jitter – 5.0 x 3.2 and 3.2 x 2.5 mm Packages

RMS Period Jitter

[3]

T_jitt

T_phj

–

1.0

0.225

1.6

0.282

RMS Phase Jitter (random)

–

0.225

0.315

–

0.1

–

Notes:

3. Measured according to JESD65B.

Rev 0.5

Page 2 of 18

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