MK2703B - Integrated Circuit Systems, Inc.

MK2703B

MDS 2703B C 1Revision 012006

Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

PLL AUDIO CLOCK SYNTHESIZER

Description

The MK2703B is a low-cost, low-jitter, high

performance PLL clock synthesizer designed to

replace oscillators and PLL circuits in set-top box and

multimedia systems. Using ICS’ patented analog

Phase Locked Loop (PLL) techniques, the device uses

a 27 MHz crystal or clock input to produce a buffered

reference clock and a selectable audio clock.

ICS manufactures the largest variety of Set-Top Box

and multimedia clock synthesizers for all applications.

Consult ICS to eliminate VCXOs, crystals and

oscillators from your board.

Features

•Packaged in 8-pin SOIC

•Available in Pb (lead) free package

•Uses an inexpensive, fundamental mode crystal or

clock

•Patented zero ppm synthesis error in all clocks

•All frequencies are frequency locked

•Advanced, low power, sub-micron CMOS process

•Operating voltage of 3.3 V or 5 V

•Industrial temperature version available

Block Diagram

Audio Clock

PLL Clock

Synthesis

and Control

Circuitry

27 MHz

crystal or

clock input

VDD

Crystal

Oscillator

S1:0

27M

GND

Capacitors are required for crystal tuning

PLL AUDIO CLOCK SYNTHESIZER

MDS 2703B C 2Revision 012006

Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

MK2703B

Pin Assignment

8-pin (150 mil) SOIC

AUDIO CLOCK OUTPUT SELECT TABLE

Key: 0 = Connect pin directly to ground

1 = Connect pin directly to VDD

Pin Descriptions

External Components

Decoupling Capacitor

As with any high-performance mixed-signal IC, the

MK2703B must be isolated from system power supply

noise to perform optimally.

A decoupling capacitor of 0.01µF must be connected

between VDD and GND on pins 2 and 3. It must be

connected close to the MK2703B to minimize lead

inductance. No external power supply filtering is

required for the MK2703B.

Series Termination Resistor

A 33Ω terminating resistor can be used next to the

clock outputs for trace lengths over one inch.

Crystal Load Capacitors

The total on-chip capacitance is approximately 16 pF. A

parallel resonant, fundamental mode, AT cut 27 MHz

crystal should be used. The device crystal connections

should include pads for small capacitors from X1 to

ground and from X2 to ground. These capacitors are

used to adjust the stray capacitance of the board to

VDD

GND

27M

CLK

X21

S1 S0 CLK (MHz)

0 0 8.192

0 1 11.2896

1 0 12.288

1 1 24.576

Number

Name

Type

Pin Description

1 X1 XI Crystal Connection. Connect to a 27 MHz fundamental crystal or clock.

2 VDD Power Connect to +3.3 V or +5 V.

3 GND Power Connect to ground.

4 27M Output 27 MHz buffered reference clock output.

5 CLK Output Audio clock output per table above.

6 S1 Input Audio clock frequency select input #1. Determines CLK output per table

above. Internal pull-up resistor.

7 S0 Input Audio clock frequency select input #0. Determines CLK output per table

above. Internal pull-up resistor.

8 X2 XO Crystal connection to a 27 MHz crystal, or leave unconnected for clock

output.

PLL AUDIO CLOCK SYNTHESIZER

MDS 2703B C 3Revision 012006

Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

MK2703B

match the nominally required crystal load capacitance.

Because load capacitance can only be increased in this

trimming process, it is important to keep stray

capacitance to a minimum by using very short PCB

traces (and no vias) between the crystal and device.

Crystal capacitors, if needed, must be connected from

each of the pins X1 and X2 to ground.

The value (in pF) of these crystal caps should equal

(CL -16 pF)*2. In this equation, CL= crystal load

capacitance in pF. Example: For a crystal with an 18 pF

load capacitance, each crystal capacitor would be 4 pF

[(18-16) x 2] = 4.

Absolute Maximum Ratings

Stresses above the ratings listed below can cause permanent damage to the MK2703B. These ratings,

which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of

the device at these or any other conditions above those indicated in the operational sections of the

specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can

affect product reliability. Electrical parameters are guaranteed only over the recommended operating

temperature range.

Recommended Operation Conditions

DC Electrical Characteristics

VDD=3.3 V ±5% , Ambient temperature -40 to +85°C, unless stated otherwise

Item Rating

Supply Voltage, VDD -0.5 V to 7 V

All Inputs and Outputs -0.5 V to VDD+0.5 V

Ambient Operating Temperature, MK2703BS (commercial) 0 to +70°C

Ambient Operating Temperature, MK2703BSI (industrial) -40 to +85°C

Storage Temperature -65 to +150°C

Soldering Temperature 260°C

Parameter Min. Typ. Max. Units

Ambient Operating Temperature -40 +85 °C

Power Supply Voltage (measured in respect to GND) +3.13 +5.50 V

Parameter Symbol Conditions Min. Typ. Max. Units

Operating Voltage VDD 3.13 5.50 V

Input High Voltage VIH X1 pin only

Note 1

(VDD/2)+1 VDD/2 V

Input Low Voltage VIL X1 pin only

Note 1

VDD/2 (VDD/2)-1 V

Input High Voltage VIH S0, S1 pins 2.0 V

Input Low Voltage VIL S0, S1 pins 0.8 V

PLL AUDIO CLOCK SYNTHESIZER

MDS 2703B C 4Revision 012006

Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

MK2703B

Note 1: CMOS level input. Nominal trigger point is VDD/2 for 3.3 V or 5 V operation

AC Electrical Characteristics

VDD = 3.3 V ±5%, Ambient Temperature -40 to +85° C, unless stated otherwise

Note 1: Measured with 15 pF load.

Thermal Characteristics

Output High Voltage VOH IOH = -12 mA 2.4 V

Output Low Voltage VOL IOL = 12 mA 0.4 V

Output High Voltage, CMOS level VOH IOH = -4 mA VDD-0.4 V

Operating Supply Current IDD No load

VDD = 3.3 V

10 mA

Short Circuit Current CLK output ±50 mA

Input Capacitance CIN S0, S1 pins 5 pF

Nominal Output Impedance 20 Ω

Frequency Synthesis Error All Clocks 0 ppm

Internal Pull-Up Resistor RPUP S1, S0 pins 750 kΩ

Parameter Symbol Conditions Min. Typ. Max. Units

Input Crystal or Clock Frequency FIN 27 MHz

Output Clock Rise Time tOR 0.8 to 2.0 V, Note 1 0.7 1.5 ns

Output Clock Fall Time tOF 2.0 to 8.0 V, Note 1 0.7 1.5 ns

Output Clock Duty Cycle at VDD/2, Note 1 40 60 %

Maximum Absolute Jitter, short

term

tja Deviation from

mean

±150 ps

Parameter Symbol Conditions Min. Typ. Max. Units

Thermal Resistance Junction to

Ambient

θJA Still air 150 °C/W

θJA 1 m/s air flow 140 °C/W

θJA 3 m/s air flow 120 °C/W

Thermal Resistance Junction to Case θJC 40 °C/W

Parameter Symbol Conditions Min. Typ. Max. Units

PLL AUDIO CLOCK SYNTHESIZER

MDS 2703B C 5Revision 012006

Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

MK2703B

Marking Diagram – MK2703BS

Marking Diagram – MK2703BSLF

Marking Diagram – MK2703BSI

Marking Diagram – MK2703BSILF

Notes:

1. ###### is the lot number.

2. YYWW is the last two digits of the year and the week number that the part was assembled.

3. “L” or “LF” denotes Pb (lead) free packaging.

4. “I” denotes industrial temperature range.

5. Bottom marking: (origin). Origin = country of origin if not USA.

MK2703B

######

YYWW

MK2703BL

######

YYWW

MK2703BI

######

YYWW

2703BIL

######

YYWW

PLL AUDIO CLOCK SYNTHESIZER

MDS 2703B C 6Revision 012006

Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

MK2703B

Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Narrow Body)

Package dimensions are kept current with JEDEC Publication No. 95

Ordering Information

Parts that are ordered with a “LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant.

While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS)

assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would

result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial

applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary

environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any

circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or

critical medical instruments.

Part / Order Number Marking Shipping Packaging Package Temperature

MK2703BS see page 5 Tubes 8-pin SOIC 0 to +70° C

MK2703BSTR Tape and Reel 8-pin SOIC 0 to +70° C

MK2703BSI Tubes 8-pin SOIC -40 to +85° C

MK2703BSITR Tape and Reel 8-pin SOIC -40 to +85° C

MK2703BSLF Tubes 8-pin SOIC 0 to +70° C

MK2703BSLFTR Tape and Reel 8-pin SOIC 0 to +70° C

MK2703BSILF Tubes 8-pin SOIC -40 to +85° C

MK2703BSILFTR Tape and Reel 8-pin SOIC -40 to +85° C

INDEX

AREA

1 2

SEATING

PLANE

- C -

.10 (.004) C

h x 45

*For reference only. Controlling dimensions in mm.

Millimeters Inches*

Symbol MinMaxMinMax

A 1.35 1.75 .0532 .0688

A1 0.10 0.25 .0040 .0098

B 0.330.51.013.020

C 0.19 0.25 .0075 .0098

D 4.80 5.00 .1890 .1968

E 3.80 4.00 .1497 .1574

e 1.27 BASIC 0.050 BASIC

H 5.80 6.20 .2284 .2440

h 0.250.50.010.020

L 0.401.27.016.050

α0°8°0°8°