Pin Assignment

Pin Description

Pin No.

Pin Name

I/O

Description

1

OSCI

I

These pins are connected to the external parts of an oscillating

circuit.

2

OSCO

O

3

MIXO

O

Mixer output pin. Connect a 455kHz ceramic filter between this

pin and the IFIN pin.

4

VCC

¾

Positive power supply

5

IFIN

I

Input terminal for IF Amp.

6

DEC

I

Bias Decoupling

7

FSKR

I

Reference input of differential amplifier for waveform shaping.

Connect the capacitor externally.

8

IFO

O

IF Amplifier Output pin. Connect the discri-

minator through the coupling capacitor.

9

QUAD

I

FM demodulator phase shift input pin connected to a quadrature

detector phase shifter.

10

AFO

O

FM demodulator output pin

11

LPFI

I

Low Pass Filter Input pin

12

LPFO

O

Low Pass Filter Output pin

13

BS

I

Battery-saving Control pin

²H² Normal Operation

²L² Battery-saving

HT9011

2

March 1, 2000

Preliminary

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

OS C I

OS C O

MI X O

VC C

IF IN

DE C

F SKR

IF O

QUA D

AF O

MI X I

GN D

RE G O

RE G C

AL M

FS K O

CHG

BS

LP F O

LP F I

H T 9011

2 0 S S O P