HT9015 datasheet(3/23 Pages) HOLTEK

3 / 23 page

Pin Assignment

Pin Description

Pin No.

Pin Name

I/O

Description

VCO2

Connects LC network with VCO1 pin to provide the tank circuit

for the received voltage control oscillator

C_RECT

¾ Normally connected to ground through a capacitor.

RX_OUT

Receiver phase detector output. The PDT of RX-PLL detects

phase errors from the received PLL. The output is connected to

external low pass filter.

TX_OUT

Transmitter phase detector output. The PDT of TX-PLL detects

phase errors from the transmitted PLL. The output is connected

to an external low pass filter.

GND2

¾ Digital ground

TX_IN

14-bit programmable transmit counter input. The output signal

from the external VCO circuit can be AC coupled to this pin.

HT9015

April 10, 2000

Preliminary

VC O 2

C_ RE CT

RX _ O UT

TX _ O U T

GND2

TX _ I N

VC C 3

LO 1

LO 2

SI G_ O U T

CL K

DA T A

ST B

FI L _ O U T

FI L _ I N

CO M P _ O UT

C_ NF

MI C _ O U T

MI C _ I N

PR E_ I N

PR E_ O U T

EXP_ O U T

RE CE _ I N

RO 1

VC O 1

VC O _ C O N T

V CC2

1 S T M IX IN

VR EF

1S T M I X O U T

E _ RE CT

2 N D M IX IN

N_ RE C

2N D M I X O U T

V CC1

IF _ I N

DE C

GND1

IF _ O U T

QU A D

AF _ O U T

N_ F I L _ O UT

N _ F I L_I N

D_ CO M P _ I N

D_ CO M P _ O UT

R SSI

BAT _ AL M

RO 2

H T 9 0 1 5

4 8 SSO P

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