EM91440 View Datasheet(PDF) - ELAN Microelectronics

Part Name

Description

Manufacturer

EM91440

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR

ELAN Microelectronics 

EM91440 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

AND DUAL-TONE MELODY GENERATOR

HKS

KEY IN

KT

SDO

2

Tdb

sT sT b0 b1 b2 b3 b4 b5 spT spT

Tbit

0 1 0 1 0 0 00 0 1

L

M

<Note>L=LSB,M=MSB, sT=START bit time, spT=STOP bit time

Figure 8. SDO operating timing

Hi-impedance

HKS

KEY IN

HFO

HDO

XMUTE

SDO

PO

HF HD HF HD

HD

HD HF HD

HD @

280

Thdrdb

ms

MELODY

@ : It can be triggled by extension telephone set for hold function release

Figure 9. HF and HD operating timing

Hi-impedance

HFI

or

HKS

KEY

KT

OSC.

HF

5

Tdly

0

"0" digit dialing time

Figure 10. Off-Hook delay time

* This specification are subject to be changed without notice.

Hi-impedance

10.1.1997 17

Share Link: