HT9032C datasheet(6/14 Pages) HOLTEK

6 / 14 page

Application Circuits

Application circuit 1

Application circuit 2

HT9032C/HT9032D

Rev. 1.40

September 30, 2002

Normally, the PDWN pin and the RTIME pin control the

operation mode of the HT9032. When both pins are

HIGH, the HT9032 is set at the power down mode, con-

suming less than 1

mA of supply current. When a valid

power ring arrives, the RTIME pin will be driven below

VT- and the portions of the part involved in the ring signal

analysis are enabled. This is partial power up mode,

consuming approximately 1.9mA typically. Once the

PDWN pin is below VT-, the part will be fully powered up,

and ready to receive FSK. During this mode, the device

current will increase to approximately 3.2mA (typ). The

state of the RTIME pin is now a

²don¢t care² as far as the

part is concerned. After the FSK message has been re-

ceived, the PDWN pin can be allowed to return to VDD

and the part will return to the power down mode.

H T 1 0 5 0

T I P

V D D

X 2

P D W N

V S S

R I N G

X 1

D O U T

H T 9 0 3 2 D

3 . 5 8 M H z

1 0 M W

3 0 p .

1 5 k W

1 8 k W

2 0 0 k W

0 . 0 1 m .

4 7 0 k W

0 . 0 1 m .

2 0 0 k W

0 . 2 m .

T I P

R I N G

0 . 2 m .

0 . 1 m .

9 V

V D D

M C U

H T 1 0 5 0

T I P

V D D

R T I M E

R D E T 1

X 2

P D W N

V S S

R I N G

C D E T

R D E T

X 1

R D E T 2

D O U T C

D O U T

H T 9 0 3 2 C

2 0 k W

3 . 5 8 M H z

1 0 M W

3 0 p .

V D D

2 7 0 k W

0 . 2 m .

1 5 k W

1 8 k W

2 0 0 k W

0 . 0 1 m .

4 7 0 k W

0 . 0 1 m .

2 0 0 k W

0 . 2 m .

T I P

R I N G

0 . 2 m .

0 . 1 m .

9 V

V D D

M C U

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