June 2005

ASM5I9773A

rev 0. 3

2.5V or 3.3V, 200 MHz, 12-Output Zero Delay Buffer

3 of 16

Notice: The information in this document is subject to change without notice.

Pin Configuration

1

Pin

Name

I/O

Type

Description

11

PECL_CLK

I, PU

LVPECL

LVPECL reference clock input.

12

PECL_CLK#

I

LVPECL

LVPECL reference clock input.

9

TCLK0

I, PU

LVCMOS LVCMOS/LVTTL reference clock input.

10

TCLK1

I, PU

LVCMOS LVCMOS/LVTTL reference clock input.

44,46,48,50

QA(3:0)

O

LVCMOS Clock output bank A.

32,34,36,38

QB(3:0)

O

LVCMOS Clock output bank B.

16,18,21,23

QC(3:0)

O

LVCMOS Clock output bank C.

29

FB_OUT

O

LVCMOS Feedback clock output. Connect to FB_IN for normal operation.

31

FB_IN

I, PU

LVCMOS

Feedback clock input. Connect to FB_OUT for normal operation. This

input should be at the same voltage rail as input reference clock.

See Table 1. Frequency Table.

25

SYNC

O

LVCMOS

Synchronous pulse output. This output is used for system

synchronization.

6

PLL_EN

I, PU

LVCMOS

PLL enable/bypass input. When Low, PLL is disabled/bypassed and

the input clock connects to the output dividers.

2

MR#/OE

I, PU

LVCMOS

Master reset and Output enable/disable input.

See Table 2. Function Table (Configuration Controls).

8

TCLK_SEL

I, PU

LVCMOS

LVCMOS Clock reference select input.

See Table 2. Function Table (Configuration Controls).

7

REF_SEL

I, PU

LVCMOS

LVCMOS/LVPECL Reference select input.

See Table 2. Function Table (Configuration Controls).

52

VCO_SEL

I, PU

LVCMOS

VCO Operating frequency select input.

See Table 2. Function Table (Configuration Controls).

14

INV_CLK

I, PU

LVCMOS

QC(2,3) Phase selection input.

See Table 2. Function Table (Configuration Controls).

5,26,27

FB_SEL(2:0)

I, PU

LVCMOS Feedback divider select input. See Table 6.

42,43

SELA(1,0)

I, PU

LVCMOS

Frequency select input, Bank A.

See Table 3. Function Table (Bank A).

40,41

SELB(1,0)

I, PU

LVCMOS

Frequency select input, Bank B.

See Table 4. Function Table (Bank B).

19,20

SELC(1,0)

I, PU

LVCMOS

Frequency select input, Bank C.

See Table 5. Function Table (Bank C).

3

SCLK

I, PU

LVCMOS Serial clock input.

4

SDATA

I, PU

LVCMOS Serial data input.

45,49

VDDQA

Supply

VDD

2.5V or 3.3V Power supply for bank A output clocks

33,37

VDDQB

Supply

VDD

2.5V or 3.3V Power supply for bank B output clocks

22,17

VDDQC

Supply

VDD

2.5V or 3.3V Power supply for bank C output clocks

13

AVDD

Supply

VDD

2.5V or 3.3V Power supply for PLL

28

VDD

Supply

VDD

2.5V or 3.3V Power supply for core and inputs

1

AVSS

Supply

Ground

Analog Ground.

15,24,30,35,

39,47,51

VSS

Supply

Ground

Common Ground.

Notes:

1. PU = Internal pull up, PD = Internal pull down.

2. A 0.1µF bypass capacitor should be placed as close as possible to each positive power pin (<0.2”). If these bypass capacitors are not close to the pins their

high frequency filtering characteristics will be cancelled by the lead inductance of the traces.

3. AVDD and VDD pins must be connected to a power supply level that is at least equal or higher than that of VDDQA, VDDQB, and VDDQC power supply pins.