Datasheet ICS615M, ICS615MT Datasheet (ICST)

PRELIMINARY INFORMATION

ICS615

I CR O

C

LOC K

Description

The ICS615 is a low cost, low jitter, high
performance PLL clock synthesizer designed to
replace 13.5, 27, and 54MHz crystals and
oscillators. Using analog/digital Phase-Locked
Loop (PLL) techniques, the device uses an
inexpensive external 13.5 MHz crystal or clock
input to produce output clocks of 13.5 MHz,
27 MHz, and 54 MHz .

ICS/MicroClock manufactures the largest variety
of Set-Top Box and multimedia clock synthesizers
for all applications. Our patented integrated
VCXO further reduces component count and cost
(see the MK2720). If more than three clock
outputs are needed, see the MK277x family of
parts. Consult ICS/MicroClock to eliminate
VCXOs, PLLs, crystals and oscillators from your
board.

Set-Top Box Clock Source

Features

• Packaged in 8 pin narrow SOIC

• Output clocks of 54, 27, and 13.5MHz

• Uses a 13.500 MHz clock or external crystal

• Full CMOS outputs with 25mA output drive
capability at TTL levels

• Low skew outputs

• Advanced, low power, sub-micron CMOS process

• +3.3V or +5V operating voltage

• See the MK2720 for these frequencies plus the
VCXO function, in an 8 pin SOIC.

Block Diagram

13.5 MHz
Clock or
Crystal

X1

X2

VDD GND

Input
Buffer/
Crystal

Oscillator

PLL/Clock

Synthesis
Circuitry

Output

Buffer

Output

Buffer

Output

Buffer

54 MHz Clock

27 MHz Clock

13.5 MHz Clock

MDS 615 A 1 Revision 052098 Printed 11/15/00

Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•[phone]tel•www.icst.com

PRELIMINARY INFORMATION

ICS615

Pin Assignment

I CR O

C

LOC K

ICS615

27M NC

GND

X1

X2

1 8
2

3
4

7
6

5

8 pin (150 mil) SOIC

13.5M
54M

Set-Top Box Clock Source

VDD

Pin Descriptions

Number Name Description

1 27M 27 MHz clock output.
2 GND Connect to ground.
3 X1 Crystal connection. Connect to a13.5 MHz clock or crystal.
4 X2 Crystal connection. Connect to a 13.5 MHz crystal. Leave unconnected for clock input.
5 54M 54 MHz clock output.
6 13.5M 13.5 MHz clock output.
7 VDD VDD. Connect to +3.3V or +5V.
8 NC No Connect. This is an unused power down pin for 27 MHz clock

MDS 615 A 2 Revision 052098 Printed 11/15/00

Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•[phone]tel•www.icst.com

PRELIMINARY INFORMATION

ABSOLUTE MAXIMUM RATINGS (note 1)

DC CHARACTERISTICS (VDD = 5.0V unless noted)

AC CHARACTERISTICS (VDD = 5.0V unless noted)

ICS615

I CR O

C

LOC K

Set-Top Box Clock Source

Electrical Specifications

Parameter Conditions Minimum Typical Maximum Units

Supply voltage, VDD Referenced to GND 7 V
Inputs and Clock Outputs Referenced to GND -0.5 VDD+0.5 V
Ambient Operating Temperature 0 70 °C
Soldering Temperature Max of 10 seconds 260 °C
Storage temperature -65 150 °C

Operating Voltage, VDD 3.00 5.50 V
Output High Voltage, VOH IOH=-4mA 2.4 V
Output Low Voltage, VOL IOL=4mA 0.4 V
Output High Voltage, VOH, CMOS level IOH=-4mA VDD-0.4 V
Operating Supply Current, IDD No Load 30 mA
Short Circuit Current ±30 mA

Input Clock 13.5 MHz
Output Clock Rise Time 0.4 to 2.4V, CL=25pF 1.5 2.5 ns
Output Clock Fall Time 2.4 to 0.4V, CL=25pF 1.5 2.5 ns
Output Clock Duty Cycle At 1.4V 45 50 55 %
Skew between any two outputs 1 ns
Maximum Absolute Jitter, short term 250 ps

Note: Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged

exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.

External Components

The ICS615 requires a minimum number of external components for proper operation. A decoupling
capacitor of 0.1µF should be connected between VDD and GND on pins 7 and 2, as close to the ICS615
as possible. A series termination resistor of 33Ω may be used for the clock outputs. The normal use is with a
clock input into pin 3, with pin 4 left unconnected. For a crystal input, consult ICS/MicroClock.

MDS 615 A 3 Revision 052098 Printed 11/15/00

Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•[phone]tel•www.icst.com

PRELIMINARY INFORMATION

Inches

Millimeters

ICS615

I CR O

C

LOC K

Package Outline and Package Dimensions

8 pin SOIC

E H

Pin 1

h x 45°

c

Q

D

e

b

Set-Top Box Clock Source

Symbol Min Max Min Max

A 0.055 0.068 1.397 1.7272
b 0.013 0.019 0.330 0.483

D 0.185 0.200 4.699 5.080

E 0.150 0.160 3.810 4.064

H 0.225 0.245 5.715 6.223

e

h 0.015 0.381

Q 0.004 0.01 0.102 0.254

A

Ordering Information

Part/Order Number Marking Shipping packaging Package Temperature

ICS615M ICS615M tubes 8 pin SOIC 0-70°C

ICS615MT ICS615M tape and reel 8 pin SOIC 0-70°C

CHANGE HISTORY
Version Date first published Status Comments
A 5/20/98 Preliminary Original

While the information presented herein has been checked for both accuracy and reliability, ICS/MicroClock 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/MicroClock. ICS/MicroClock reserves the right to change any circuitry or specifications without notice. ICS/MicroClock
does not authorize or warrant any ICS/MicroClock product for use in life support devices or critical medical instruments.

MDS 615 A 4 Revision 052098 Printed 11/15/00

Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•[phone]tel•www.icst.com