Micrel, Inc.

SM802116

July 2011

3

M9999-071811-A

Pin Description (Continued)

Pin Number

Pin Name

Pin Type

Pin Level

Pin Function

5, 11, 16, 18

TEST

Factory Test pins, Do not connect anything to these pins.

1

VDD

PWR

Core Power Supply

13, 14, 15

VSS

PWR

Core Power Supply Ground

17

VDDO1

PWR

Power Supply for Output Bank 1

21

VSSO1

PWR

Power Supply Ground for Output Bank 1

8

REF_IN

I, (SE)

LVCMOS

Reference Clock Input

9

XTAL_IN

I, (SE)

12pF crystal

Crystal Reference Input, no load caps needed.

(see Figure 5)

10

XTAL_OUT

O, (SE)

12pF crystal

Crystal Reference Output, no load caps needed.

(se Figure 5)

6

FSEL

I, (SE)

LVCMOS

Frequency Select, 1 = 106.25MHz, 0 = 212.5MHz,

45KΩ pull-up

7

OE1

I, (SE)

LVCMOS

Output Enable, Q1 disables to tri-state,

0 = Disabled, 1 = Enabled, 45KΩ pull-up

12

OE2

I, (SE)

LVCMOS

Output Enable, Q2 disables to tri-state,

0 = Disabled, 1 = Enabled, 45KΩ pull-up

Truth Tables

PLL_BYPASS

XTAL_SEL

OE2

OE1

INPUT

OUTPUT

0

−

1

1

−

PLL

1

−

1

1

−

XTAL/REF_IN

−

0

1

1

REF_IN

−

−

1

1

1

XTAL

−

−

−

0

1

−

Q2 Tri-state

−

−

1

0

−

Q1 Tri-state

FSEL

Output Frequency

(MHz)

0

212.5

1

106.25