ICS8534-01

LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER

IDT™ / ICS™ 3.3V LVPECL FANOUT BUFFER

2

ICS8534AY-01 REV. A DECEMBER 6, 2007

Table 1. Pin Descriptions

NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.

Number

Name

Type

Description

1, 16, 17, 32,

33, 48, 49, 64

Power

Output supply pins for LVPECL outputs.

2, 3, 12, 13

nc

Unused

No connect.

Power

Core supply pin for LVPECL outputs.

5

CLK

Input

Pulldown

Non-inverting differential clock input.

6

nCLK

Input

Pullup/

Pulldown

7

CLK_SEL

Input

Pullup

Clock select input. When HIGH, selects PCLK, nPCLK inputs.

When LOW, selects CLK, nCLK inputs. LVCMOS / LVTTL interface levels.

8

PCLK

Input

Pulldown

Non-inverting differential LVPECL clock input.

9

nPCLK

Input

Pullup/

Pulldown

10

Power

Negative supply pin.

11

OE

Input

Pullup

Output enable. When logic HIGH, the outputs are enabled (default).

When logic LOW, the outputs are disabled and drive differential low:

Qx = LOW, nQx = HIGH. LVCMOS / LVTTL interface levels.

14, 15

nQ21, Q21

Output

Differential clock outputs. LVPECL interface Levels.

18, 19

nQ20, Q20

Output

Differential clock outputs. LVPECL interface Levels.

20, 21

nQ19, Q19

Output

Differential clock outputs. LVPECL interface Levels.

22, 23

nQ18, Q18

Output

Differential clock outputs. LVPECL interface Levels.

24, 25

nQ17, Q17

Output

Differential clock outputs. LVPECL interface Levels.

26, 27

nQ16, Q16

Output

Differential clock outputs. LVPECL interface Levels.

28, 29

nQ15, Q15

Output

Differential clock outputs. LVPECL interface Levels.

30, 31

nQ14, Q14

Output

Differential clock outputs. LVPECL interface Levels.

34, 35

nQ13, Q13

Output

Differential clock outputs. LVPECL interface Levels.

36, 37

nQ12, Q12

Output

Differential clock outputs. LVPECL interface Levels.

38, 39

nQ11, Q11

Output

Differential clock outputs. LVPECL interface Levels.

40, 41

nQ10, Q10

Output

Differential clock outputs. LVPECL interface Levels.

42, 43

nQ9, Q9

Output

Differential clock outputs. LVPECL interface Levels.

44, 45

nQ8, Q8

Output

Differential clock outputs. LVPECL interface Levels.

46, 47

nQ7, Q7

Output

Differential clock outputs. LVPECL interface Levels.

50, 51

nQ6, Q6

Output

Differential clock outputs. LVPECL interface Levels.

52, 53

nQ5, Q5

Output

Differential clock outputs. LVPECL interface Levels.

54, 55

nQ4, Q4

Output

Differential clock outputs. LVPECL interface Levels.

56, 57

nQ3, Q3

Output

Differential clock outputs. LVPECL interface Levels.

58, 59

nQ2, Q2

Output

Differential clock outputs. LVPECL interface Levels.

60, 61

nQ1, Q1

Output

Differential clock outputs. LVPECL interface Levels.

59

nQ0, Q0

Output

Differential clock outputs. LVPECL interface Levels.