2

Simplified Block Diagram

+

-

LEVEL

SHIFTER

BUFFER

BUFFER AMP

OSC IN 2

3 OSC OUT

EXTERNAL CRYSTAL

FREQ 1

FREQ 2

7

6

ENABLE

8

15pF

15pF

4

5

OUTPUT

1

N

P

P

IN

OUT

OSCILLATOR

(NOTE 2)

(NOTE 2)

(NOTE 2)

1 OF 4

DECODE

FREQUENCY SELECTION TRUTH TABLE

ENABLE

FREQ 1

FREQ 2

SWITCH

OUTPUT RANGE

11

1

10kHz - 100kHz

11

0

100kHz - 1MHz

10

1

1MHz - 5MHz

10

0

5MHz - 10MHz+

0

X

X

X

High Impedance

NOTE:

2. Logic input pull-up resistors are constant current source of 0.4

µA.

HA7210