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EM91440C Datasheet(PDF) 17 Page - ELAN Microelectronics Corp

Part # EM91440C
Description  TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
PDF  24 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM91440C Datasheet(HTML) 17 Page - ELAN Microelectronics Corp

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EM91440 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
17
* This specification are subject to be changed without notice.
10.1.1997
Figure 8. SDO operating timing
<Note>L=LSB,M=MSB, sT=START bit time, spT=STOP bit time
HF
HD
HF
HD
HF
HD
HD
HD
HD @
280
ms
Thdrdb
HKS
KEY IN
HFO
HDO
XMUTE
SDO
PO
MELODY
Hi-impedance
Figure 10. Off-Hook delay time
Tdly
"0" digit dialing time
0
5
HF
HFI
or
HKS
KEY
KT
OSC.
Hi-impedance
@ : It can be triggled by extension telephone set for hold function release
Figure 9. HF and HD operating timing
HKS
KEY IN
KT
SDO
Tdb
2
sT
sT b0
b1
b2
b3 b4
b5 spT spT
0
1
0
1
00
0 0
0
1
Tbit
L
M
Hi-impedance



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