PI6C3Q991-IJ datasheet(1/10 Pages) PERICOM

Part #	PI6C3Q991-IJ

Description	3.3V Programmable Skew PLL Clock Driver

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Manufacturer	PERICOM [Pericom Semiconductor Corporation]

Direct Link	http://www.pericom.com

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1 / 10 page

1

PS8449A

10/09/00

Features

PI6C3Q99X family provides following products:

PI6C3Q991:32-pinPLCCversion

PI6C3Q993:28-pinQSOPversion

Inputs are 5V I/O Tolerant

4 pairs of programmable skew outputs

Low skew: 200ps same pair; 250ps all outputs

Selectable positive or negative edge synchronization:

Excellent for DSP applications

Synchronous output enable

Output frequency: 3.75 MHz to 85 MHz

2x, 4x, 1/2, and 1/4 outputs

3 skew grades:

3-level inputs for skew and PLL range control

PLL bypass for DC testing

Externalfeedback,internalloopfilter

12mA balanced drive outputs

Low Jitter: < 200ps peak-to-peak

Industrial temperature range

Pin-to-pincompatiblewithIDTQS5V991andQS5V993

Availablein32-pinPLCCand28-pinQSOP

Description

ThePI6C3Q99Xfamilyisahighfanout3.3VPLL-basedclockdriver

intended for high performance computing and data-communica-

tions applications. A key feature of the programmable skew is the

abilityofoutputstoleadorlagtheREFinputsignal.ThePI6C3Q991

has 8 programmable skew outputs in 4 banks of 2, while the

PI6C3Q993 has 6 programmable skew outputs and 2 zero skew

outputs.Skewiscontrolledby3-levelinputsignalsthatmaybehard-

wiredtoappropriateHIGH-MID-LOWlevels.

When the GND/sOE pin is held low, all the outputs are synchro-

nously enabled. However, if GND/sOE is held high, all the outputs

except3Q0and3Q1aresynchronouslydisabled.Furthermore,when

the V CCQ/PE is held high, all the outputs are synchronized with the

positive edge of the REF clock input. When VCCQ /PE is held low,

alltheoutputsaresynchronizedwiththenegativeedgeof REF.Both

devices have LVTTL outputs with 12mA balanced drive outputs.

PinConfigurations

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PI6C3Q991, PI6C3Q993

3.3V Programmable Skew PLL Clock Driver

SuperClock®

REF

VCCQ

FS

3F0

3F1

VCCQ/PE

VCCN

4Q1

4Q0

GND

3Q1

3Q0

VCCN

FB

GND

TEST

2F1

2F0

GND/sOE

1F1

1F0

VCCN

1Q0

1Q1

GND

2Q0

2Q1

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

2F0

GND/sOE

1F1

1F0

VCCN

1Q0

1Q1

GND

3F1

4F0

4F1

VCCQ/PE

VCCN

4Q1

4Q0

GND

5

6

7

8

9

10

11

12

13

29

28

27

26

25

24

23

22

21

4

3 2

1 32 31 30

14 15 16 17 18 19 20

PI6C3Q993

PI6C3Q991

28-Pin

Q

32-Pin

J

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PI6C3Q991-IJ Datasheet(PDF) 1 Page - Pericom Semiconductor Corporation

PI6C3Q991-IJ Datasheet(HTML) 1 Page - Pericom Semiconductor Corporation

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