ICS8524AYT datasheet(1/17 Pages) IDT

Part #	ICS8524AYT

Description	LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-HSTL FANOUT BUFFER

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Manufacturer	IDT [Integrated Device Technology]

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8524AY

www.icst.com/products/hiperclocks.html

REV. B AUGUST 1, 2007

1

ICS8524

LOW SKEW, 1-TO-22

DIFFERENTIAL-TO-HSTL FANOUT BUFFER

GENERAL DESCRIPTION

The ICS8524 is a low skew, 1-to-22 Differential-

to-HSTL Fanout Buffer and a member of the

HiPerClockS™Family of High Performance Clock

Solutions from ICS. The ICS8524 has two select-

able clock inputs. The CLK, nCLK pair can accept

most standard differential input levels. The PCLK, nPCLK pair

can accept LVPECL, CML, or SSTL input levels. The device is

internally synchronized to eliminate runt pulses on the outputs

during asynchronous assertion/deassertion of the OE pin. The

ICS8524’s low output and part-to-part skew characteristics

make it ideal for workstation, server, and other high performance

clock distribution applications.

FEATURES

• 22 differential HSTL outputs

each with the ability to drive 50

Ω to ground

• Selectable differential CLK, nCLK or LVPECL clock inputs

• CLK, nCLK pair can accept the following differential

input levels: LVPECL, LVDS, HSTL, SSTL, HCSL

• PCLK, nPCLK supports the following input types:

LVPECL, CML, SSTL

• Maximum output frequency: 500MHz

• Translates any single-ended input signal (LVCMOS, LVTTL,

GTL) to HSTL levels with resistor bias on nCLK input

• Output skew: 80ps (maximum)

• Part-to-part skew: 700ps (maximum)

• Jitter, RMS: 0.04ps (typical)

• LVPECL and HSTL mode operating voltage supply range:V

DD

= 3.3V ± 5%, V

DDO = 1.6V to 2V, GND = 0V

• 0°C to 85°C ambient operating temperature

• Pin compatible with the SY89824L and NB100EP223

BLOCK DIAGRAM

PIN ASSIGNMENT

HiPerClockS™

ICS

CLK

nCLK

PCLK

nPCLK

Q0:Q21

nQ0:nQ21

LE

Q

D

CLK_SEL

OE

0

1

22

64-Lead TQFP E-Pad

10mm x 10mm x 1.0mm package body

Y package

Top View

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

1 2 3 4 5 6

7 8 9 10 11 12 13 14 15 16

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

ICS8524

VDDO

Q14

nQ14

Q15

nQ15

Q16

nQ16

Q17

nQ17

Q18

nQ18

Q19

nQ19

Q20

nQ20

VDDO

nQ6

Q6

nQ5

Q5

nQ4

Q4

nQ3

Q3

nQ2

Q2

nQ1

Q1

nQ0

Q0

VDDO

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