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HT9172 Datasheet(PDF) 6 Page - Holtek Semiconductor Inc

Part # HT9172
Description  DTMF Receiver
Download  13 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT9172 Datasheet(HTML) 6 Page - Holtek Semiconductor Inc

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Timing Diagrams
HT9172
Rev. 1.00
6
March 30, 2006
t I A
t I R
T o n e
E S T
R T / G T
D 0 ~ D 3
D V
O E
t P D V
t D D O
t P D O
t A C C
t E D O
t G T A
t R E J
t D P
t D A
t G T P
t D O V
T o n e n
T o n e n + 1
T o n e C o d e n + 1
V T R T
t P D V
t D P
t D P
T o n e C o d e n – 1
T o n e C o d e n
Figure 3. Steering Timing
T o n e
P W D N
E S T
T o n e
t P U
Figure 4. Power-up Timing


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