1

PS8704A

9/22/04

1:5/1:7 3.3V CMOS Clock Drivers

Description

Pericom Semiconductor’s PI49FCT3280x is a 3.3V very low-skew

clock buffer from a single low-capacitance input that produces five

outputs on PI49FCT32802 and seven outputs on PI49FCT32803.

Excellent output signals to power and ground ratio minimize power

and ground noise, and also improves output performance.

The PI49FCT3280x integrates series damping resistors on all

outputs.

Pin Configuration (PI49FCT32802)

Block Diagram (PI49FCT32802)

PI49FCT32802

PI49FCT32803

Features

• Low skew: < 200ps

• Fast switching frequency >133 MHz

• Fast output rise/fall time < 1.5ns

• Low propagation delay < 2.5ns

• Low input capacitance < 6.0pF

• 5V Tolerant input

• Rail-to-Rail CMOS outputs

• Industrial Temperature: –40°C to +85°C

• 3.3V ±10% operation

• Packages (Pb-free & Green available):

– 16-pin 150-mil wide QSOP (Q)

– 16-pin 173-mil wide TSSOP (L)

A

Pin Configuration (PI49FCT32803)

Block Diagram (PI49FCT32803)

A

VCC

A

1

16

B4

GND

2

15

B3

B0

3

14

GND

VCC

4

13

B2

B1

5

12

VCC

GND

6

11

NC

NC

7

10

GND

VCC

8

9

16-Pin

L, Q

VCC

A

1

16

B6

GND

2

15

B5

B0

3

14

GND

VCC

4

13

B4

B1

5

12

VCC

GND

6

11

B3

B2

7

10

GND

VCC

8

9

16-Pin

L, Q

Pin Description

Pin Name

Description

PI49FCT32802

PI49FCT32803

A

A

Input

B0–B4

B0–B6

Outputs

GND

GND

Ground

Power