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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 aerospace, industrial and defense

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.

For HCSL output signaling, maximum frequency is

500 MHz.

Contact SiTime

for higher frequency options.

(For additional frequencies, refer to

SiT9346

datasheets)

LVPECL, Low-swing LVPECL, LVDS and HCSL output

signaling

0.1 ps 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 mm

, 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 1.01

17 March 2021

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

220.000001 to 725 MHz for LVDS and

LVPECL output drivers

220.000001 to 500 MHz for HCSL driver

[2]

Feature Pin

“N”: No Connect

“E”: Output Enable

Signalling Type

“1”:

“2”:

“4”:

“5”:

LVPECL

LVDS

HCSL

Low-swing LVPECL

Voltage Supply

“25”: 2.5 V ±10%

“28”: 2.8 V ±10%

“30”: 3.0 V ±10%

“33”: 3.3 V ±10%

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

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

(3 ku)

—

8 mm T&R

(1 ku)

—

12 mm T&R

(3 ku)

—

12 mm T&R

(1 ku)

—

16 mm T&R

(3 ku)

16 mm T&R

(1 ku)

Rev 1.01

Page 2 of 16

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

Timing Diagrams .......................................................................................................................................................................... 7

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

LVPECL and Low-swing LVPECL ......................................................................................................................................... 8

LVDS..................................................................................................................................................................................... 9

HCSL .................................................................................................................................................................................... 9

Dimensions and Patterns ― 3.2 x 2.5 mm

................................................................................................................................ 10

Dimensions and Patterns ― 5.0 x 3.2 mm

................................................................................................................................ 10

Dimensions and Patterns ― 7.0 x 5.0 mm

................................................................................................................................ 11

Additional Information................................................................................................................................................................. 12

Revision History ......................................................................................................................................................................... 13

Rev 1.01

Page 2 of 16

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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, Low-swing LVPECL, LVDS and HCSL

Parameter

Output Frequency Range

Frequency Stability

Symbol

F_stab

Min.

220.000001

-10

-20

-25

-50

First Year Aging

5 Year Aging

10 Year Aging

20 Year Aging

Operating Temperature Range

F_1y

F_5y

F_10y

F_20y

T_use

-0.7

-1.1

-1.3

-1.5

-20

-40

Acceleration (g) sensitivity,

Gamma Vector

Supply Voltage

F_g

–

Typ.

–

±0.4

±0.7

±0.8

±1.0

–

Max.

725

+10

+20

+25

+50

+0.7

+1.1

+1.3

+1.5

+70

+85

+95

+105

0.1

Unit

MHz

ppm

°C

ppb/g

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

At 85°C

Extended Commercial

Industrial

Condition

Accurate to 6 decimal places

Inclusive of initial tolerance, operating temperature, rated power

supply voltage and load variations

Frequency Range

Frequency Stability

Temperature Range

Rugged Characteristics

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 1.01

Page 2 of 16

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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

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

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

Max.

–

Vdd-0.7

Vdd-1.5

2.0

330

Unit

A

Condition

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

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

Current Consumption

Output Characteristics for LVPECL

Output Characteristics for Low-swing LVPECL

–

Vdd-1.2

Vdd-0.75

See

Figure 4

Vdd-1.8

0.4

–

225

1.0

0.220

Vdd-1.25

1.2

1.6

320

1.6

0.270

See

Figure 4

Output frequency 1 to 220 MHz, See

Figure 5

Output frequency greater than 220 MHz, See

Figure 5

20% to 80%. See

Figure 5

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

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

all Vdd levels, includes spurs. Temperature ranges -20 to 70°C

and -40 to 85°C

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

MHz, all Vdd levels, includes spurs. Temperature ranges -40 to

95°C and -40 to 105°C

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 = 3.3 V or 2.5 V

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

all Vdd levels, includes spurs. Temperature ranges -20 to 70°C

and -40 to 85°C.

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

all Vdd levels, includes spurs. Temperature ranges -40 to 95°C

and -40 to 105°C

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

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

all Vdd levels

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]

RMS Phase Jitter (random)

T_jitt

T_phj

–

1.0

0.225

1.6

0.282

–

0.225

0.315

–

0.1

–

Notes:

3. Measured according to JESD65B.

Rev 1.01

Page 2 of 16

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