Micrel, Inc.

SM803020

July 22, 2013

5

Revision 1.0

hbwhelp@micrel.com or (408) 955-1690

Pin Number

Pin Name

Pin Type

Pin Level

Pin Function

B19, B32

NC

A25

VCXO_OUT

O, SE

VCXO output, 8 to 10pF, programmable

A26

VCXO_IN

I, SE

VCXO input, 8 to 10pF, programmable

A24

VC

I

Control voltage for VCXO, positive slope

Truth Tables

PLL_BYPASS

XTAL_SEL

OEA

OEB

OEC

OED

Input

Output

0

−

1

1

1

1

−

PLL

1

−

1

1

1

1

−

XTAL/REF_IN

−

0

1

1

1

1

REF_IN

−

−

1

1

1

1

1

XTAL

−

−

−

0

1

1

1

−

QA Tri-state

−

−

1

0

1

1

−

QB Tri-state

−

−

1

1

0

1

−

QC Tri-state

−

−

1

1

1

0

−

QD Tri-state

FSEL

Output Frequency (MHz)

1

Primary

0

Secondary

Output Logic Programming

Available output logic types are LVPECL (default), LVDS,

HCSL and LVCMOS.

Each output can be programmed individually to any of the

four logic types through SPI.

Unused outputs can be disabled to high impedance.

All logic types are differential except LVCMOS. LVCMOS

signals are single ended coming out of the Qx pins. During

LVCMOS operation the /Qx pins are disabled.