June 2005

ASM2I99456

rev 0.2

3.3V/2.5V LVCMOS Clock Fanout Buffer

3 of 14

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

Table 1. Pin Configuration

Pin Number

Pin

I/O

Type

Function

3

4

PECL_CLK,

PECL_CLK

Input

LVPECL

Differential Clock reference

Low Voltage positive ECL input

5,6,7

FSELA, FSELB,

FSELC

Input

LVCMOS

Output bank divide select input

32

MR/OE

Input

LVCMOS

Internal reset and output tristate control

8,11,15,20,24,27,31

GND

Supply

Negative Voltage supply output bank (GND)

25,29

18,22

9,13, 17

VCCA,

VCCB

VCCC

Supply

Positive Voltage supply for output banks

2

VCC

Supply

Positive Voltage supply core (VCC)

30,28,26

QA0 - QA2

Output

LVCMOS

Bank A Outputs

23,21,19

QB0 - QB2

Output

LVCMOS

Bank B Outputs

10,12,14,16

QC0 - QC3

Output

LVCMOS

Bank C Outputs

1

NC

-

-

No Connect

Note:1 VCCB is internally connected to VCC.

Table 2. Supported Single and Dual Supply Configurations

Supply voltage

configuration

VCC

1

VCCA

2

VCCB

3

VCCC

4

GND

3.3V

3.3V

3.3V

3.3V

3.3V

0V

Mixed voltage supply

3.3V

3.3V or 2.5V

3.3V

3.3V or 2.5V

0 V

2.5V

2.5V

2.5V

2.5V

2.5V

0 V

Note: 1 VCC is the positive power supply of the device core and input circuitry. VCC voltage defines the input threshold and levels

2 VCCA is the positive power supply of the bank A outputs. VCCA voltage defines bank A output levels

3 VCCB is the positive power supply of the bank B outputs. VCCB voltage defines bank B output levels. VCCB is internally connected to VCC.

4 VCCC is the positive power supply of the bank C outputs. VCCC voltage defines bank C output levels

Table 3. Function Table (Controls)

Control

Default

0

1

FSELA

0

FSELB

0

FSELC

0

MR/OE

0

Outputs enabled

Internal reset

Outputs disabled (tristate)

Table 4. Absolute Maximum Ratings

1

Symbol

Characteristics

Min

Max

Unit

Condition

Supply Voltage

-0.3

4.6

V

DC Input Voltage

-0.3

V

DC Output Voltage

-0.3

V

DC Input Current

±20

mA

DC Output Current

±50

mA

Storage temperature

-40

125

°C

Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect

device reliability.