em91401 ELAN Microelectronics Corp, em91401 Datasheet - Page 16

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em91401

Manufacturer Part Number
em91401
Description
Tone/pulse Switchable Dialer With Lcd Interface And Dual-tone Melody Generator
Manufacturer
ELAN Microelectronics Corp
Datasheet

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<Note>L=LSB,M=MSB, sT=START bit time, spT=STOP bit time
@ : It can be triggled by extension telephone set for hold function release
* This specification are subject to be changed without notice.
OSC.
HKS
KEY
HFI
KT
or
KEY IN
MELODY
XMUTE
KEY IN
HKS
SDO
HDO
KT
HKS
HFO
SDO
PO
HF
HF
Tdly
5
HD
Figure 8. SDO operating timing
Figure 9. HF and HD operating timing
HF
Figure 10. Off-Hook delay time
Tdb
HD
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
0
"0" digit dialing time
sT
0
sT b0
1 0
HD
L
b1 b2 b3 b4 b5 spT spT
1
Tbit
2
0
AND DUAL-TONE MELODY GENERATOR
0
HD
0 0
M
HF
0
1
HD
Hi-impedance
HD @
Hi-impedance
ms
93
EM91401 SERIES
Hi-impedance
10.1.1997
Thdrdb
16

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