ICS570B

Multiplier and Zero Delay Buffer

MDS 570B A

2

Revision 053001

Integrated Circuit Systems, Inc . • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com

PRELIMINARY INFORMATION

Pin Assignment

Number

Name

Type

Description

1

S1

I

Select 1 for output clock. Connect to GND, VDD, or float per decoding table above.

2

VDD

P

Connect to +3.3V.

3

GND

P

Connect to ground.

4

ICLK

CI

Reference clock input.

5

FBIN

CI

Feedback clock input.

6

S0

I

Select 0 for output clock. Connect to GND, VDD, or float per decoding table above.

7

CLK

O

Clock output per table above.

8

CLK/2

O

Clock output per table above. Low skew divide by two of pin 7 clock.

Pin Descriptions

Key: CI = clock input, I = input, O = output, P = power supply connection

Clock Multiplier Decoding Table

(Multiplies input clock by shown amount)

0 = connect directly to ground.

M = leave unconnected (self-biases to VDD/2).

1 = connect directly to VDD.

*Input range with CLK feedback is double that for CLK/2.

FBIN from CLK

FBIN from CLK

FBIN from CLK/2

FBIN from CLK/2

25°C ICLK Input Range

85°C ICLK Input Range

S1

S0

CLK

CLK/2

CLK

CLK/2

FB from CLK/2 *

FB from CLK/2 *

#1

#6

pin # 7

pin # 8

pin # 7

pin # 8

(3.3V, MHz)

(3.3V, MHz)

0

0

Power Down and Tri-State

Power Down and Tri-State

Power Down and Tri-State

Power Down and Tri-State

-

-

0

M

x3

x1.5

x6

x3

2.5 to 25

3 to 25

0

1

x4

x2

x8

x4

2.5 to 19

2.5 to 19

M

0

x8

x4

x16

x8

2.5 to 9.5

2.5 to 9.5

M

M

x6

x3

x12

x6

2.5 to 12.5

2.5 to 12.5

M

1

x10

x5

x20

x10

2.5 to 7.5

2.5 to 7.5

1

0

x1

÷2

x2

x1

5 to 75

8 to 75

1

M

x16

x8

x32

x16

2.5 to 5

2.5 to 5

1

1

x2

x1

x4

x2

2.5 to 37.5

4.5 to 37.5

1

8

2

3

4

7

6

5

S1

GND

CLK

VDD

FBIN

8 pin 150 mil SOIC

ICLK

CLK/2

S0

External Components

The ICS570B requires a 0.01 µF decoupling capacitor to be connected between VDD and GND. It must be

connected close to the ICS570B to minimize lead inductance. No external power supply filtering is required for this

device. A 27

Ω series terminating resistor can be used next to each output pin.