Datasheet ICS671M-01, ICS671M-01T Datasheet (ICST)

ICS671-01

Zero Delay, Low Skew Buffer and Multipler

Description

The ICS671-01 is a low phase noise, high speed
PLL based, 8 output, low skew zero delay buffer
and multiplier. Based on ICS’s proprietary low
jitter Phase Locked Loop (PLL) techniques, the
device provides eight low skew outputs at speeds
up to 160 MHz at 3.3 V. The ICS671-01 includes
a bank of six outputs running at either x2 or x4
mode, one output running at either x2, x4, or x5
mode, and one more output running at either x1,
x2, or x4 mode. For normal operation, output
clock CLK8 is tied to the FBIN pin.

ICS manufactures the largest variety of clock
generators and buffers, and is the largest clock
supplier in the world.

Block Diagram

Features

• Packaged in 16 pin narrow SOIC

• Clock outputs from 5 to 160 MHz

• Zero input-output delay

• Integrated x2 or x4 selections, and x5 for CLK7

• Eight low-skew (<250 ps) outputs

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

• Tri-state mode for board-level testing

• Advanced, low power, sub-micron CMOS process

• 3.3 V to 5 V operating voltage

CLKIN

FBIN

S1, S0

CLK1
CLK2
CLK3

x2, x4, or x5

PLL

2

Control

Logic

CLK4
CLK5

CLK6
CLK7

CLK8

MDS 671-01 B 1 Revision 051700 Printed 11/15/00

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

ICS671-01

Zero Delay, Low Skew Buffer and Multipler

Pin Assignment

ICS671-01

16

1

CLK1

2

3
VDD
GND

CLK3
CLK4

S0

4

5

6

7

8

16 pin narrow (150 mil) SOIC

Output Clock Mode Select Table

S1 S0 CLK1:6 CLK7 CLK8 Input range

0 0 Tri-state (high impedance) Tri-state (high impedance) Tri-state (high impedance) ­0 1 x2 x5 x1 5 to 30 MHz
1 0 x 2 x2 x2 15 to 80 MHz
1 1 x4 x 4 x4 7.5 to 40 MHz

15
14
13

12
11
10

9

FBINCLKIN
CLK8
CLK7CLK2
VDD
GND
CLK6

CLK5
S1

Pin Descriptions

Number Name Type Description

1 CLKIN I Clock Input.

2, 3, 6, 7,

10, 11

4, 13 VDD P Power supply. Connect both pins to same voltage (either 3.3 V or 5 V).
5, 12 GND P Connect to ground.

8 S0 I Select input 0. See table above.

9 S1 I Select input 1. See table above.
14 CLK7 I Clock Output 7. See table above.
15 CLK8 I Clock Output 8. See table above. Normally use this clock as feedback.
16 FBIN I Feedback Input. Connect to CLK8 under normal operations.

CLK1:6 O Clock Outputs 1:6. See above table.

Key: I = Input; O = output; P = power supply connection.

External Components

The ICS671-01 requires a minimum number of external components for proper operation. Decoupling
capacitors of 0.01µF should be connected between VDD and GND on pins 4 and 5, and VDD and GND
on pins 13 and 12, as close to the device as possible. A series termination resistor of 33 Ω may be used close
to each clock output pin to reduce reflections.

MDS 671-01 B 2 Revision 051700 Printed 11/15/00

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

ICS671-01

Zero Delay, Low Skew Buffer and Multipler

Electrical Specifications

Parameter Conditions Minimum Typical Maximum Units

ABSOLUTE MAXIMUM RATINGS (note 1)

Supply voltage, VDD Referenced to GND -0.5 7 V
Inputs and Clock Outputs Referenced to GND -0.5 VDD+0.5 V
Electrostatic Discharge MIL-STD-883 2000 V
Ambient Operating Temperature 0 70 °C
Soldering Temperature Max of 10 seconds 260 °C
Junction temperature 150 °C
Storage temperature -65 150 °C

DC CHARACTERISTICS (VDD = 3.3 V unless specified otherwise)

Operating Voltage, VDD 3.13 5.50 V
Input High Voltage, VIH, CLKIN pin only VDD/2+1 VDD/2 V
Input Low Voltage, VIL, CLKIN pin only VDD/2 VDD/2-1 V
Input High Voltage, VIH 2 V
Input Low Voltage, VIL 0.8 V
Output High Voltage, VOH IOH=-25mA 2.4 V
Output Low Voltage, VOL IOL=25mA 0.4 V
Output High Voltage, VOH, CMOS level IOH=-8mA VDD-0.4 V

Operating Suppl Current, IDD (Note 2)
Operating Suppl Current, IDD (Note 3)

Short Circuit Current Each output ±50 mA
Input Capacitance S0, S1, FBIN 7 pF

AC CHARACTERISTICS (VDD = 3.3 V unless specified otherwise)

Input Clock Frequency See table on page 2 5 80 MHz
Output Clock Frequency See table on page 2 5 160 MHz
Output Clock Rise Time, CL=30pF 0.8 to 2.0V 1.5 ns
Output Clock Fall Time, CL=30pF 2.0 to 0.8V 1.5 ns
Output Clock Duty Cycle, VDD=3.3V At VDD/2 40 50 60 %
Device to Device Skew, equally loaded rising edges at VDD/2 700 ps
Output to Output Skew, equally loaded rising edges at VDD/2 250 ps
Input to Output Skew, FBIN to CLK8 rising edges at VDD/2 ±350 ps
Maximum Absolute Jitter 300 ps
Cycle to Cycle Jitter, 30pF loads 500 ps

Notes: 1. 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.

2. With CLKIN = 20 MHz, FBIN to CLK8, all outputs at 40 MHz.

3. With CLKIN = 80 MHz, FBIN to CLK8, all outputs at 160 MHz.

No Load, S1=1, S0=0 25 mA
No Load, S1=1, S0=0 74 mA

MDS 671-01 B 3 Revision 051700 Printed 11/15/00

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

Zero Delay, Low Skew Buffer and Multipler

Package Outline and Package Dimensions
(

For current dimensional specifications, see JEDEC Publication No. 95.)

16 pin SOIC narrow

Symbol Min Max Min Max

A 0.0532 0.0688 1.35 1.75

A1

EH

INDEX

AREA

12

h x 45°

D

B 0.0130 0.0200 0.33 0.51

C

D 0.3859 0.3937 9.80 10.00

E 0.1497 0.1574 3.80 4.00

e .050 BSC 1.27 BSC

H 0.2284 0.2440 5.80 6.20

h 0.0099 0.0195 0.25 0.50
L 0.0160 0.0500 0.41 1.27

ICS671-01

Inches Millimeters

0.0040 0.0098 0.10 0.24

0.0075 0.0098 0.19 0.24

A1

e

C

B

A

L

Ordering Information

Part/Order Number Marking Shipping packaging Package Temperature

ICS671M-01 ICS671M-01 tubes 16 pin SOIC 0-70 °C

ICS671M-01T ICS671M-01 tape and reel 16 pin SOIC 0-70 °C

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

MDS 671-01 B 4 Revision 051700 Printed 11/15/00

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