83905AM

http://www.icst.com/products/hiperclocks.html

REV. A JANUARY 20, 2005

1

Integrated

Circuit

Systems, Inc.

ICS83905

PRELIMINARY

The ICS83905 is a low skew, 1-to-6 LVCMOS /

LVTTL Fanout Buffer and a member of the

HiPerClockS™ family of High Performance Clock

Solutions from ICS. The ICS83905 single ended

clock input accepts LVCMOS or LVTTL input lev-

els. The low impedance LVCMOS/LVTTL outputs are designed

to drive 50

Ω series or parallel terminated transmission lines.

The effective fanout can be increased from 6 to 12 by utilizing

the ability of the outputs to drive two series terminated lines.

The ICS83905 is characterized at full 3.3V, 2.5V, and 1.8V,

mixed 3.3V/2.5V, 3.3V/1.8V and 2.5V/1.8V output operating

supply mode. Guaranteed output and part-to-part skew char-

acteristics along with the 1.8V output capabilities makes the

ICS83905 ideal for high performance, single ended applica-

tions that also require a limited output voltage.

• 6 LVCMOS / LVTTL outputs

• Crystal oscillator interface

• Output frequency range: 10MHz to 50MHz

• Crystal input frequency range: 10MHz to 50MHz

• Output skew: 10ps (typical)

• 5V tolerant enable inputs

• Synchronous output enables

• Operating supply modes: Full 3.3V, 2.5V and 1.8V,

mixed 3.3Vcore/2.5V or1.8V operating supply, and

mixed 2.5V core/1.8V operating supply

• 0°C to 70°C ambient operating temperature

• Lead-Free package fully RoHS compliant

• Pin compatible to MPC905

• Industrial version available upon request

HiPerClockS™

ICS

ICS83905

16-Lead SOIC

3.9mm x 9.9mm x 1.38mm body package

M Pacakge

Top View

ICS83905

16-Lead TSSOP

4.4mm x 3.0mm x 0.92mm body package

G Pacakge

Top View

SYNCHRONIZE

SYNCHRONIZE

BCLK0

BCLK1

BCLK2

BCLK3

BCLK4

BCLK5

ENABLE 1

ENABLE 2

XTAL_IN

XTAL_OUT

XTAL_OUT

ENABLE 2

GND

BCLK0

BCLK1

GND

BCLK2

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

XTAL_IN

ENABLE 1

BCLK5

BCLK4

GND

BCLK3

The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial

product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.

20 19 18 17 16

6

7

8

9 10

1

2

3

4

5

15

14

13

12

11

BCLK5

BCLK4

GND

GND

GND

GND

BCLK0

BCLK1

ICS83905

20-Lead VFQFN

4mm x 4mm x 0.9mm

body package

K Package

Top View