Integrated

Circuit

Systems, Inc.

General Description

Features

ICS9112-06/07

Block Diagram

Low Skew Output Buffer

9112-06 9112-07 Rev H 1/22/99

Pin Configuration

16 pin SOIC

•

Zero input - output delay

•

Frequency range 25 - 75 MHz (3.3V), 30-90MHz (5.0V)

•

Less than 200 ps Jitter between outputs

•

Skew controlled outputs

•

Skew less than 250 ps between outputs

•

Available in 8 or 16 pin versions, 150 mil SOIC packages

•

3.3V ±10%, 5.0V±10% operation

The ICS9112 is a high performance, low skew, low jitter clock

driver. It uses a phase lock loop (PLL) technology to align, in

both phase and frequency, the REF input with the CLKOUT

signal. It is designed to distribute high speed clocks in PC

systems operating at speeds from 25 to

75 MHz (30 to 90mHz for 5V operation).

ICS9112 is a zero delay buffer that provides synchronization

between the input and output. The synchronization is

established via CLKOUT feed back to the input of the PLL.

Since the skew between the input and output is less than +/-

350 pS, the part acts as a zero delay buffer.

The ICS9112 comes in with two different options; dash 06

and dash 07. The dash 07 is available in a 16 pin 150 mil SOIC

package. It has two banks of four outputs controlled by two

address lines. Depending on the selected address line, bank B

or both banks can be put in a tri-state mode. In this mode, the

PLL is still running and only the output buffers are put in a

high impedance mode. The test mode shuts off the PLL and

connects the input directly to the output buffers (see table

below for functionality).

The dash 06 is an eight pin 150 mil SOIC package. It has five

output clocks. In the absence of REF input, both ICS9112-06

and -07 will be in the power down mode. In this mode, the

PLL is turned off and the output buffers are pulled low. Power

down mode provides the lowest power consumption for a

standby condition.

8 pin SOIC

2

S

F1

S

F

A

K

L

C

)

4

,

1

(

B

K

L

C

)

4

,

1

(

T

U

O

K

L

C

t

u

p

t

u

O

e

c

r

u

o

S

L

L

P

n

w

o

d

t

u

h

S

00

e

t

a

t

s

i

r

Te

t

a

t

s

i

r

Tn

e

v

i

r

DL

L

PN

01

n

e

v

i

r

De

t

a

t

s

i

r

Tn

e

v

i

r

DL

L

PN

10

t

s

e

T

e

d

o

M

t

s

e

T

e

d

o

M

t

s

e

T

e

d

o

M

F

E

RY

11

n

e

v

i

r

Dn

e

v

i

r

Dn

e

v

i

r

DL

L

PN

Functionality (-07)

ICS reserves the right to make changes in the device data identified in this publication

without further notice. ICS advises its customers to obtain the latest version of all device

data to verify that any information being relied upon by the customer is current and accurate.