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PI6CFGL201B

RevB

03/16/16

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PI6CFGL201B

2-Output Low Power PCIE Gen 1-2-3 Clock Generator

Pin Description

Pin# Pin Name

Type

Description

1

XTAL_IN

Input

Crystal input or reference input clock, Nominally 25.00MHz.

2

XTAL_OUT

Output

Crystal output.

3

VDDXTAL

Power

3.3V Power supply for XTAL.

4

SADR/REF1.8 Input/Output Latch to select SMBus Address/1.8V LVCMOS REF1.8 output. This pin has an internal

pull-down.

5

VDDREF1.8

Power

Power supply for the REF1.8 output

6

GNDDIG

Power

Ground pin for digital circuitry

7

VDDDIG3.3

Power

3.3V digital power (dirty power)

8

SCLK_3.3

Input

Clock pin of SMBus circuitry, 3.3V tolerant.

9

SDATA_3.3

Input/Output Data pin for SMBus circuitry, 3.3V tolerant.

10

GND

Power

Ground pin.

11

VDDO1.8

Power

Power supply, nominal 1.8V, range 1.05V~3.3V.

12

OE0#

Input

Active low input for enabling CLK0 pair 0. This pin has an internal pull-down.

1 =disable outputs, 0 = enable outputs

13

CLK0

Output

Differential true clock output

14

CLK0#

Output

Differential Complementary clock output

15

GNDA

Power

Ground pin for the PLL core.

16

VDDA3.3

Power

3.3V power for the PLL core.

17

CLK1

Output

Differential true clock output

18

CLK1#

Output

Differential Complementary clock output

19

OE1#

Input

Active low input for enabling CLK1 pair 1. This pin has an internal pull-down.

1 =disable outputs, 0 = enable outputs

20

VDDO1.8

Power

Power supply, nominal 1.8V, range 1.05V~3.3V.

21

GND

Power

Ground pin.

22

CKPWRGD_

PD#

Input

Input notifies device to sample latched inputs and start up on first high assertion. Low

enters Power Down Mode, subsequent high assertions exit Power Down Mode. This

pin has internal pull-up resistor.

23

SS_EN_tri

Input

Latched select input to select spread spectrum amount at initial power up :

1 = -0.5% spread, M = -0.25%, 0 = Spread Off

This pin has an internal pull-down.

24

GNDXTAL

Power

GND for XTAL

Typical Crystal Requirement

Parameter

Test Conditions Min.

Type

Max.

Units

Mode of Oscillation

Fundamental

Frequency

25

MHz

Equivalent Series Resistance (ESR)

Ω

Shunt Capacitance

pF

Recommended Crystal Specification

a) FL2500047, SMD 3.2X2.5(4P), 25MHz, CL=18pF, +/-20ppm, http://www.pericom.com/pdf/datasheets/se/FL.pdf

b) FY2500091, SMD 5x3.2(4P), 25MHz, CL=18pF, +/-30ppm, http://www.pericom.com/pdf/datasheets/se/FY_F9.pdf

15-0134