Datasheet ICS503M, ICS503MT Datasheet (ICST)

PRELIMINARY

PRELIMINARY

INFORMATION

INFORMATION

ICS503

LOCO™ PLL Clock Multiplier

Description

The ICS503 is a member of the LOCO™ family,
the most cost effective way to generate a high
quality, high frequency clock output from a low
frequency crystal or clock input. The name LOCO
stands for LOw Cost Oscillator, as it is designed
to replace crystals and crystal oscillators in most
electronic systems. Using Phase-Locked-Loop
(PLL) techniques, the device uses a standard
fundamental mode, inexpensive crystal to produce
output clocks up to 160 MHz.

Stored in the chip’s ROM is the ability to generate
9 different multiplication factors, allowing one
chip to be used in two or three different
applications (see page 2).

Features

• Packaged as 8 pin SOIC or die

• ICS’ lowest cost PLL clock family

• Generates 16.9344 MHz for stereo codecs from
the 14.31818 MHz motherboard clock

• Can be cost effective in replacing a single
surface-mount crystal

• Can be driven by other 5xx series

• Input crystal frequency of 5 - 27 MHz

• Input clock frequency of 2 - 50 MHz

• Output clock frequencies up to 160 MHz

• Low jitter - 50 ps one sigma

• Duty cycle of 45/55 up to 160 MHz

• Operating voltages of 3.0 to 5.5V

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

Block Diagram

Crystal or
clock input

S0
S1

X1/ICLK

X2

VDD GND

Clock Multiplier

Crystal

Oscillator

Optional crystal capacitors

• Advanced, low power CMOS process

PLL

Output

Circuitry

and

ROM

Buffer

CLK

MDS 503 A 1 Revision 111000

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

Pin Assignment

PRELIMINARY

PRELIMINARY

INFORMATION

INFORMATION

ICS503

LOCO™ PLL Clock Multiplier

X1/ICLK

VDD
GND

NC

1 8

2
3
4

X2

7

S1

6

S0

5

CLK

Clock Decoding Table (MHz)

S1 S0 Multiplier Typical Input (MHz) CLK (MHz) Input Range (MHz) at 5V Input Range (MHz) at 3.3V

0 0 10 10 100 2 ≤ Input ≤ 16 2 ≤ Input ≤ 10
0 M 16 10 160 2 ≤ Input ≤ 10 2 ≤ Input ≤ 6

0 1 1.1111 27 30.00 20 ≤ Input ≤ 50 20 ≤ Input ≤ 40
M 0 2.4444 14.31818 35.00 10 ≤ Input ≤ 50 10 ≤ Input ≤ 40
M M 2.4164 14.31818 34.60 10 ≤ Input ≤ 50 10 ≤ Input ≤ 40
M 1 2.4 14.31818 34.36 10 ≤ Input ≤ 50 10 ≤ Input ≤ 40

1 0 5.5873 14.31818 80.00 14 ≤ Input ≤ 28 14 ≤ Input ≤ 18

1 M 1.1827 14.31818 16.934 14 ≤ Input ≤ 30 14 ≤ Input ≤ 30

1 1 4.1905 14.31818 60.00 5 ≤ Input ≤ 38 5 ≤ Input ≤ 24

0 = connect directly to ground, 1 = connect directly to VDD, M = leave unconnected (floating).

Pin Descriptions

Number Name Type Description

1 X1/ICLK I Crystal connection or clock input.
2 VDD P Connect to +3.3V or +5V.
3 GND P Connect to ground.
4 NC - Nothing is connected to this pin.
5 CLK O Clock output per Table above. Output frequency equals input frequency times multiplier.
6 S0 TI Select 0 for output clock. Connect to GND or VDD or float.
7 S1 TI Select 1 for output clock. Connect to GND or VDD or float.
8 X2 O Crystal connection. Leave unconnected for clock input.

Key: I = Input, TI = Tri-Level Input, O = output, P = power supply connection

MDS 503 A 2 Revision 111000

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

PRELIMINARY

ABSOLUTE MAXIMUM RATINGS (stresses beyond these can permanently damage the device)

DC CHARACTERISTICS (VDD = 5.0V unless otherwise noted)

AC CHARACTERISTICS (VDD = 5.0V unless otherwise noted)

PRELIMINARY

INFORMATION

INFORMATION

ICS503

LOCO™ PLL Clock Multiplier

Electrical Specifications

Parameter Conditions Minimum Typical Maximum Units

Supply Voltage, VDD Referenced to GND 7 V
Inputs Referenced to GND -0.5 VDD+0.5 V
Clock Output 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 5.5 V
Input High Voltage, VIH, ICLK only ICLK (Pin 1) (VDD/2)+1 VDD/2 V
Input Low Voltage, VIL, ICLK only ICLK (Pin 1) VDD/2 (VDD/2)-1 V
Input High Voltage, VIH S1, S0 VDD-0.5 V
Input Low Voltage, VIL S1, S0 0.5 V
Output High Voltage, VOH, CMOS high IOH=-4mA VDD-0.4 V
Output High Voltage, VOH IOH=-25mA 2.4 V
Output Low Voltage, VOL IOL=25mA 0.4 V
IDD Operating Supply Current, 14 MHz crystal No Load, 80MHz 16 mA
Short Circuit Current CLK output ±70 mA
Input Capacitance, S1, S0 Pins 6, 7 4 pF

Input Frequency, crystal input See table on page 2 5 27 MHz
Input Frequency, clock input See table on page 2 2 50 MHz
Output Frequency VDD = 4.5 to 5.5V 14 160 MHz
Output Frequency VDD = 3.0 to 3.6V 14 100 MHz
Output Clock Rise Time 0.8 to 2.0V 1 ns
Output Clock Fall Time 2.0 to 0.8V 1 ns
Output Clock Duty Cycle at VDD/2 45 49 to 51 55 %
Absolute Clock Period Jitter Deviation from mean ±120 ps
One Sigma Clock Period Jitter 50 ps

MDS 503 A 3 Revision 111000

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

PRELIMINARY

Inches

Millimeters

PRELIMINARY

INFORMATION

INFORMATION

ICS503

LOCO™ PLL Clock Multiplier

External Components / Crystal Selection

The ICS503 requires a 0.01µF decoupling capacitor to be connected between VDD and GND. It must be
connected close to the ICS503 to minimize lead inductance. No external power supply filtering is required
for this device. A 33Ω terminating resistor can be used next to the CLK pin. The total on-chip capacitance
is approximately 6 pF, so a parallel resonant, fundamental mode crystal should be used. If exact tuning of
the frequency is required, crystal capacitors should be connected from each of the pins X1 and X2 to
ground as shown in the Block Diagram on page 1. The value (in pF) of these crystal caps should be equal
to (CL-6)*2, where CL is the crystal load capacitance in pF. These external capacitors are only required for

applications where the exact frequency is critical. For a clock input, connect to X1 and leave X2
unconnected (no capacitors on either).

Package Outline and Package Dimensions

8 pin SOIC

E H

Q

Pin 1

e

D

h x 45°

A

c

b

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

Ordering Information

Part/Order Number Marking Package Temperature

ICS503M ICS503M 8 pin SOIC 0-70°C

ICS503MT ICS503M 8 pin SOIC on tape and reel 0-70°C

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 503 A 4 Revision 111000

LOCO is a trademark of ICS

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