Integrated

Circuit

Systems, Inc.

ICS8501

8501

www.icst.com

REV. A - AUGUST 23, 2000

1

• 16 small swing DCM outputs

• Translates any differential input signal(PECL, HSTL, LVDS,

DCM) to DCM levels without external bias networks

• Translates single ended input levels to DCM levels with a

resistor bias network on the nCLK input

• Translates single ended input levels to inverted DCM levels

with a resistor bias network on the CLK input

• Voh(max) = 1.2V

• 40% of Voh ≤ Vcrossover ≤ 60% of Voh

• 45% ≤ Duty Cycle ≤ 55%

• Output frequency up to 500MHz

• 100ps output skew

• 3.3V operating supply

• 48 lead low-profile QFP(LQFP), 7mm x 7mm x 1.4mm

package body, 0.5mm package lead pitch

• 0°C to 70°C ambient operating temperature

48 47 46 45 44 43 42 41 40 39 38 37

13 14 15 16 17 18 19 20 21 22 23 24

1

2

3

4

5

6

7

8

9

10

11

12

36

35

34

33

32

31

30

29

28

27

26

25

VCC

Q11

nQ11

Q10

nQ10

GND

Q9

nQ9

Q8

nQ8

VCC

nc

CLK

VCC

nQ0

Q0

nQ1

Q1

GND

nQ2

Q2

nQ3

Q3

VCC

ICS8501

The ICS8501 is a low skew, 1-to-16 Differential

Current Mode Fanout Buffer and a member of

the HiPerClockS™ family of High Performance

Clock Solutions from ICS. The ICS8501 is de-

signed to translate any differential signal levels

to small swing differential current mode(DCM) output levels.

An external reference resistor is used to set the value of the

current supplied to an external load load/termination resis-

tor. The load resistor value is chosen to equal the value of

the characteristic line impedance of 50Ω. The ICS8501 is char-

acterized at an operating supply voltage of 3.3V.

The small swing outputs, accurate crossover voltage and duty

cycle makes the ICS8501 ideal for interfacing to today’s most

advanced microprocessors.

HiPerClockS™

,&6

CLK

nCLK

Q0

nQ0

Q1

nQ1

Q2

nQ2

Q3

nQ3

Q4

nQ4

Q5

nQ5

Q6

nQ6

Q7

nQ7

Q15

nQ15

Q14

nQ14

Q13

nQ13

Q12

nQ12

Q11

nQ11

Q10

nQ10

Q9

nQ9

Q8

nQ8

48-Lead LQFP

Y Package

Top View