HT9170B(1999) 查看數據表（PDF） - Holtek Semiconductor

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HT9170B
(Rev.:1999)

DTMF Receiver

Holtek Semiconductor 

Timing Diagrams

tR E J

Tone

Tone n

t IR

t IA

Tone n+1

tD P

EST

tD P

tA C C

tD A

tD P

V TRT

R T /G T

D 0~D 3

DV

OE

Tone C ode n 1

tP D V

tP D O

Tone C ode n

tD O V

tG T P

tP D V

tD D O

Figure 3. Steering timing

Tone

Tone

PW DN

EST

tP U

Figure 4. Power up timing

HT9170

tG T A

Tone C ode n+1

tE D O

8

December 20, 1999

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